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CHEMISTRY > UNIT#18 CARBOXYLIC ACIDS > Flashcards

UNIT#18 CARBOXYLIC ACIDS Flashcards

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1
Q

The general formula for carboxylic acid is:

A

CnH2nO2

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2
Q

Which of the following is an unsaturated carboxylic acid:

A

Maleic acid

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3
Q

Acetic acid exists as a dimer in benzene due to:

A

Hydrogen Bonding

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4
Q

An acid with an unpleasant smell:

A

Butyric acid

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5
Q

Glacial acetic acid at low temperature is a:

A

Ice like solid

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6
Q

Which of the following is an unsaturated aliphatic organic acid

A

Maleic acid

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7
Q

Which one is a carboxylic acid?

A

Palmitic acid

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8
Q

Organic acid which cannot be obtained by hydrolysis of fats

A

Succinic Acid
(Fats on hydrolysis give unsaturated fatty acids)

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9
Q

By oxidation of which compound carboxylic acids cannot be obtained

A

2-Methyl-2-Propanol

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10
Q

A compound is oxidized to X, by further oxidation of X if the resulting compound is butyric acid, starting compound can be:

A

Butanol

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11
Q

Alkane nitriles on boiling with which type of acid gives organic acids

A

Mineral Acids

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12
Q

If ethanoic acid is to be prepared by hydrolysis of alkane nitriles, which of the following can be the reagent to be hydrolyzed?

A

CH3CN

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13
Q

ALkane nitriles can be prepared by treating alkyl halide with:

A

Alcoholic potassium cyanide

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14
Q

Propanoic acid is produced from ___ on acid hydrolysis.

A

Ethyl cyanide

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15
Q

Potassium carbonate is decomposed by acetic acid and releases a gas, the nature of the gas is:

A

Acidic

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16
Q

Which group of carboxylic acids is active for reaction with alkali metal carbonates?

A

H-atom of OH group

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17
Q

Which reaction can be used in artificial juices formation with carboxylic acids

A

Esterification

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18
Q

The addition of ethyl alcohol in protonated acetic acid is:

A

Nucleophilic addition

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19
Q

Benzyl alcohol and acetic acid give a compound with ___ fragrance.

A

Jasmine

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20
Q

Ammonium acetate converts to acetamide by:

A

➡Heating
➡Dehydration

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21
Q

Which of the following represents acid amide

A

CH3CONH2

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22
Q

Which sequence of groups replaces OH o carboxylic acid with halides, esters and amides respectively?

A

➡X
➡OR
➡NH2

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23
Q

Which gas is released during acid halide formation with the help of thionyl chloride and carboxylic acids

A

SO2

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24
Q

During the formation of an acid amide from ethanoic acid, what actually happens:

A

Displacement of the -OH from the acid by -NH2

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25
Q

Carboxylic acids react with active metals (Na, K, Ca and Mg) to form their salt and :

A

H2 gas

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26
Q

Which pair can be used as a reactant for the preparation of acetyl chloride:

A

➡CH3COOH, PCl5
➡CH3COOH, SOCl2

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27
Q

For the production of a carboxylic acid derivative. The reaction of nucleophilic to carboxyl group is always followed by the displacement of :

A

-OH group

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28
Q

The work of concentrated H2SO4 in the esterification process is as:

A

➡Dehydrating agent
➡Catalyst

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29
Q

Acetyl chloride is soluble in which solvent:

A

➡Water
➡Ether

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30
Q

Which of the following is not an example of an electrophilic substitution reaction?

A

➡Reaction of CH3COOH and Na❌
➡Reaction of CH3COOH and NaHCO3❌
➡Reaction of CH3COOH and Na2CO3❌
➡Reaction of CH3COOH and PCl5✅

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31
Q

Identify reversible reactions among the following.

A

➡Esterification✅
➡Acid Halide Formation❌
➡Acid Anhydride Formation❌
➡Acid Amide Formation❌

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32
Q

Ethyl butyrate is an ester formed by the combination of __ and butyric acid.

A

Ethyl Alcohol

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33
Q

By product produced during hydrolysis of alkane nitrile in the basic medium is:

A

NH3

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34
Q

2CH3COOH + x Ca ➡Ca(OCOCH3)2. Calculate value of ‘x’.

A

1

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35
Q

Which of the following carboxylic acid derivative is the least reactive?

A

Acid Amide

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36
Q

The stronger acid among the following is:

A

➡Cl3CCOOH✅
➡ClCH2COOH❌
➡Cl2CHCOOH❌
➡CH3COOH❌

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37
Q

The strength of the organic acids and chloro substituted acids is measured by the pKa scale such that a smaller value of pKa corresponds to:

A

Stronger acid

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38
Q

Organic acids (Carboxylic acids) are considered as:

A

Weak acids

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39
Q

Identify the strongest conjugate base among the following:

A

➡OH-❌
➡RCOO-❌
➡-OR✅
➡PhO-❌

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40
Q

The fruity smell of organic compounds is because of;

A

Ester

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41
Q

From which of the following sources, acetic acid was first isolated?

A

Vinegar

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42
Q

Acetic acid is used to prepare:

A

➡Acetone
➡Acetate
➡Esters

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43
Q

Which is formed when hydrogen is added to the carboxylic group?

A

Methane

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44
Q

A number of oxygen in the cyclic ring of a dimer of carboxylic acid are:

A

4

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45
Q

Which of the following is used in perfumes

A

Alcohol

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46
Q

Which is formed when hydrogen is added to the carboxylic group in presence of HI in phosphorus

A

Ethane

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47
Q

Acetic acid s used to prepare:

A

➡Acetone
➡Acetate
➡Esters

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48
Q

Which s dibasic carboxylic acid

A

Oxalic acid

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49
Q

In benzene, carboxylic acids exist as ____?

A

Dimers

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50
Q

Which of the following catalyst is used for the preparation of acidic anhydrides?

A

P2O5

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51
Q

The reaction of carboxylic acids which involve H atom removal of OH group from _____ as major products in all reactions?

A

Salts

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52
Q

Which of the following are most soluble in water?

A

Ethanoic acid

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53
Q

Formic acid is obtained from:

A

Ant’s sting

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54
Q

When two carboxylic acids are strongly heated in the presence of P2O5, which product is formed?

A

Acid Anhydrides

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55
Q

Which of the following is a carboxylic acid derivative?

A

Acyl Halide

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56
Q

Which of the following is the weaker acid?

A

CH3COOH

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57
Q

How carboxylic acids are formed from alcohol?

A

Oxidation

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58
Q

Acetic acid is also named as:

A

Ethanoic acid

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59
Q

The flavour of amyl butyrate?

A

Apricot

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60
Q

All are aliphatic carboxylic acids except:

A

➡Methanoic acid❌
➡Ethanoic acid❌
➡Benzoic acid✅
➡Lactic acid❌

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61
Q

Which of the following causes a complete reduction of a carboxylic acid into alkanes?

A

HI/P

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62
Q

Another name for oxalic acid is:

A

Ethanedioic acid

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63
Q

Which one of the following is not fatty acid

A

Phthalic acid

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64
Q

Carboxylic acid with alcohol is called:

A

Esterification

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65
Q

Amino acid and alcohol are mixed which product will be formed?

A

Ether

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66
Q

Phthalic acid is:

A

Dicarboxylic acid

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67
Q

When fat reacts with NaOH, the reaction is called:

A

Saponification

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68
Q

Which of the following is used as a coagulant for latex in the rubber industry:

A

Acetic acid

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69
Q

Glycine is an amino acid which is present in solution as:

A

Zwitter ion

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70
Q

The reverse of esterification is:

A

Hydrolysis

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71
Q

Phthalic acid:

A

Dicarboyxlic aromatic acid

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72
Q

Which one is a weak acid:

A

➡Acetic acid❌
➡Formic acid❌
➡Propanoic acid❌
➡Butanoic acid✅

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73
Q

Hydrolysis of cyano group by aqueous acid results into;

A

Carboxylic acids

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74
Q

Which of the following compounds in the form of an aqueous solution will produce CO2 on reaction with sodium carbonate?

A

C2H5CO-CO

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75
Q

CH3CN + HCl ➡A + B in presence of water in the above reaction will produce CO2 in reaction with sodium carbonate:

A

➡Acetic acid
➡Ammonium chloride

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76
Q

Consider the following reaction CH3COOH + Mg(metal) ➡? What product will form:

A

Magnesium Acetate

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77
Q

CH₃COOH + PCl5 ➡ the products of the above reaction are:

A

CH₃COCl + POCl₃ + HCl

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78
Q

The -NH-CO group is called;

A

Amide group

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79
Q

When CH3-CH2-Oh is oxidized in the presence of K2Cr2O7 and H2SO4, the product formed is:

A

CH₃COOH

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80
Q

When ethanoyl chloride reacts with methylamine an amide is formed. What is the structure of it amide formed?

A

CH3-CO-NHCH3

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81
Q

The relative strength of alcohol, phenol, water and carboxylic acids is;

A

Carboxylic acids > Phenol > Water > Alcohol

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82
Q

Methyl cyanides, on boiling with mineral acids or alkalies, yield:

A

Acetic acid

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83
Q

The formation of ester from acetic acid in presence of acid and ethanol is a:

A

Nucleophilic substitution reaction

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84
Q

CH3-COOH + NH3 ➡
The final products formed are:

A

CH3-CO-NH2 + H2O

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85
Q

Ethyl butyrate and butyl butanoate are esters with the flavour of:

A

Pineapple

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86
Q

Organic compounds ‘X’ and ‘Y’ both can react with Na-metal to evolve hydrogen gas. ‘X’ and ‘Y’ react with each other to form an organic compound ‘Z’ which gives fruity smell. What types of compounds ‘X’, ‘Y’ and

A

➡X: Alcohol
➡Y: Acetic Acid
➡Z: Ester

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87
Q

An organic acid ‘z’ reacts completely with sodium bicarbonate, sodium hydroxide and sodium carbonate. Which of the following represents the structure of ‘z’.

A

H3C-CH2-COOH

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88
Q

CH3COOH + CH3CH2OH ➡ CH3COOC2H5 + H2O
Which of the following will act as a catalyst in the above reaction?

A

H2SO4

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89
Q

Which of the following reaction of a carboxylic acid is reversible?

A

Esterification

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90
Q

The order of the acid strength is:

A

CCl3COOH> CHCl2COOH> CH2ClCOOH> CH3COOH

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91
Q

Compounds having -C≡N group are called;

A

Nitriles

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92
Q

The final product of hydrolysis of nitrile yield:

A

Carboxylic acid

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93
Q

During esterification, the bond from alcohol that breaks in between:

A

Oxygen and Hydrogen

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94
Q

C2H5OH + CH2COOH ➡CH3COOC2H5 + H2O
Which of the following catalyst is used in the above reaction?

A

Conc. H2SO4

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95
Q

Which product s formed by the reaction of a carboxylic acid with alcohol?

A

Ester

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96
Q

Which one will act as a strong acid?

A

Trichloroethanoic acid

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97
Q

Acetyl chloride(Ethanoyl chloride) is used in the synthesis of organic compounds. It is prepared by treating acetic acid with:

A

SOCl2

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98
Q

What will be the outcome of the reaction of methanol with ethanoic acid in the presence of concentrated sulphuric acid?

A

Methyl ethanoate is formed

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99
Q

Which one o the following compounds can exist in the form of cyclic dimers?

A

A carboxylic acid

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100
Q

The reagent used to reduce a carboxylic acid to an alkane is:

A

NaBH4

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101
Q

Which of the following is not a fatty acid?

A

Phenylacetic acid

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102
Q

Select the correct order of acids’ strength.

A

CHCl2COOH>CH2ClCOOH>CH3COOH

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103
Q

Which compound shows the highest boiling point?

A

➡CH3COOH✅
➡C2H5OH❌
➡C2H5-O-C2H5❌
➡(CH3CH2)3N❌

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104
Q

Which one is more reactive?

A

➡Ester❌
➡Acid Halide✅
➡Amide❌
➡Acid Anhydride❌

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105
Q

Nitriles (RCN) on hydrolysis in the presence of mineral acid yield:

A

Carboxylic acids

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106
Q

Carboxylic acids can be reduced into corresponding alcohols. Which of the following reagent can be used for this purpose?

A

LiAlH4

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107
Q

Which of the following reagent is required for the preparation of acyl chloride (CH3COCl) from ethanoic acid

A

PCl5

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108
Q

Which o the following is the strongest acid?

A

➡Propanoic acid❌
➡Fluoroethanoic acid❌
➡Trichloroethanic acid✅
➡Nitroethanoic acid❌

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109
Q

Hydrolysis of acyl chloride results in the formation of:

A

Carboxylic acids

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110
Q

The exact reactivity order for carboxylic acid derivatives is;

A

Acyl Chloride > Anhydride > Ester

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111
Q

A carboxyl acid contains a functional group:

A

a carboxyl group

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112
Q

Of the following carboxylic acids which acid has higher acidity;

A

➡Nitroethanoic acid✅
➡Ethanoic acid❌
➡Propanoic acid❌
➡Chloroethanoic acid❌

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113
Q

Which reagent is used to reduce carboxylic acid?

A

LiAlH4

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114
Q

Stronger acid is;

A

HCOOh

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115
Q

Acetamide is prepared by:

A

Heating ammonium acetate

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116
Q

Carboxylic acids react with the metal to form salts with the evolution of:

A

H2

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117
Q

Ethane-1,2-dioic acid is also called:

A

Oxalic acid

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118
Q

The carboxylic acid can be prepared by the action of Grignard’s reagent with:

A

CO2

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119
Q

The IUPAC name for formic acid is:

A

Methanoic acid

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120
Q

The reaction of alcohol with acetic acid is known as:

A

Esterification

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121
Q

Esters are formed by the reaction of carboxylic acids with:

A

Alcohols

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122
Q

Which one of the following has both hydroxyl and carboxylic acid groups?

A

Salicyclic acid

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123
Q

Which of the following cannot be prepared directly from acetic acid?

A

Acetamide

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124
Q

The reaction between caustic soda and fat is called:

A

Saponification

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125
Q

When a carboxylic acid reacts with alcohol, it produces a new class of compounds:

A

Esters

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126
Q

Which of the following is α-hydroxy acid?

A

➡Stearic acid❌
➡Picric acid❌
➡Lactic acid✅
➡Iso-butyric acid❌

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127
Q

Which of the following has the highest solubility in water?

A

➡Acetic acid✅
➡n-butyric acid❌
➡Iso-butyric acid❌
➡Propionic acid❌

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128
Q

Carboxylic acids do not give the characteristic reactions of:

A

Alkyl part

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129
Q

Acetic acid shows a molecular mass of 120 when dissolved in benzene. This is because of:

A

Dimerisation

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130
Q

Which of the following produces violet colour with FeCL3 solution?

A

Picric acid

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131
Q

Which of the following is present in Vinegar?

A

Acetic acid

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132
Q

Acetic acid reacts with PCl5 to form:

A

CH3COCl

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133
Q

The fatty acid which shows the reducing properties is:

A

Acetic acid

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134
Q

Among the following acids which have the lowest pKa value:

A

➡CH3CH2COOH❌
➡HCOOH✅
➡(CH3)CH-COOH❌
➡CH3COOH❌

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135
Q

Which of the following is not a dicarboxylic acid?

A

➡Oxalic acid❌
➡Malonic acid❌
➡Adipic acid❌
➡Valeric acid✅

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136
Q

Which of the following are generally used in the preparation of artificial flavours?

A

Esters of lower fatty acids

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137
Q

Which of the following will reduce carboxylic acid to 1° alcohol?

A

LiAlH4

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138
Q

An example of a Zwitter ion is:

A

Alanine

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139
Q

α-Amino acids behave as crystalline ionic solids and have a high melting point due to the presence of:

A

Both -NH2 and -COOH group

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140
Q

Which of the following compounds does not have a carboxyl group

A

Picric acid

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141
Q

Which of the following is the strongest acid?

A

➡HCOOH✅
➡C6H5COOH❌
➡CH3COOH❌
➡CH3CH2COOH❌

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142
Q

When sodium formate is heated with soda lime, it forms:

A

CH4

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143
Q

Which is used to remove ink and rust stains on cloth:

A

Oxalic acid

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144
Q

Vinegar contains:

A

6 to 10% acetic acid

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145
Q

When acetyl chloride reacts with any amine, the reaction is known as:

A

Acetylation

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146
Q

Formic acid and acetic acid may be distinguished by reaction with:

A

Dilute acidic permanganate

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147
Q

Stingers of bees and wasps contain:

A

Formic acid

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148
Q

The name glacial acetic acid is given to pure acetic acid:

A

It forms ice like solid below 17°C

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149
Q

Which of the following is used in the baking powder:

A

Tartaric acid

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150
Q

Acid is obtained as a result reaction between a Grignard reagent and:

A

CO2

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151
Q

Some amino acids are most important because they are the final product of hydrolysis of peptide bond proteins and they are:

A

α-amino acid

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152
Q

An amino protein is transferred from one point to the other point and this dipolar ion is called;

A

Zwitter Ion

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153
Q

Which of the following reaction is/are shown by carboxylic acid?

A

➡Acid base Reaction
➡Nucleophilic Substitution Reaction
➡Reaction involving carboxyl group as a whole

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154
Q

Which of the following ester give the flavour of jasmine:

A

Benzyl Acetate

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155
Q

The dilute solution of ___ is called vinegar.

A

Acetic acid

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156
Q

An organic compound containing both amine and carboxyl groups is known as;

A

Amino acid

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157
Q

The order of acid strength is:

A

CClCOOH> CHCl2COOH> CH2ClCOOH> CH3COOH

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158
Q

Methyl cyanides, on boiling with mineral acids or alkalies yield:

A

Acetic acid

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159
Q

The formation of ester form acetic acid in presence of acid and ethanol is:

A

Nucleophilic substitution reaction

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160
Q

Complete reduction of carboxylic acids to alkanes is carried out with;

A

HI/P

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161
Q

Consider the following reaction: CH3COOH + Mg (metal) ➡? What product will form?

A

Magnesium acetate

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162
Q

Which of the following compounds, in the form of an aqueous solution, on reaction with sodium carbonate will produce carbon dioxide gas?

A

H3C2-CO-OH

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163
Q

CH3COOH + PCl5➡?.
The products of the above reaction are:

A

CH3COCl + POCl3 HCl

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164
Q

Carboxylic acids are rather hard to reduce, which powerful reducing agent can be used to convert them to the corresponding primary alcohol:

A

LiAlH4

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165
Q

CH3COOH + CH3CH2OH ➡CH3COOC2H5 + H2O; Which one of the following will act as a catalyst in the above reaction?

A

H2SO4

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166
Q

Which one of the following reactions of a carboxylic acid is reversible?

A

Esterification

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167
Q

Acetamide is formed by dehydration of:

A

Ammonium acetate

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168
Q

When ethanoyl chloride reacts with methylamine, an amide is formed. What is the structure of the amide formed?

A

H3C-CO-NHCH3

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169
Q

Ethyl butyrate and butyl butanoate are esters with the flavour are:

A

Pineapple

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170
Q

Which product is obtained by the reaction of a carboxylic acid with alcohol?

A

Ester

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171
Q

The nature of amino acid ‘lysine’ is;

A

Basic

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172
Q

Which of the following has an amino R-group?

A

Lysine

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173
Q

At an intermediate value of pH, amino acids form Zwitter ions containing:

A

-NH₃+ and COO-

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174
Q

In basic conditions, amino acid exists in one of the following forms:

A

H2N-CH2-COO-

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175
Q

The amno acids largely exist in dipolar ionic form:

A

Alpha amino acids

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176
Q

α-amino acids are compounds having carboxylic acid as well as amino functional groups attached to:

A

Same carbon atom

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177
Q

The formula of ‘Zwitter ion’ is represented as;

A

H3N+-CHR-CO2-

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178
Q

The amino acids which are not prepared in the human body are called:

A

Essential amino acids

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179
Q

Indicate the cyclic amino acid from the following:

A

Proline

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180
Q

At low pH or in acidic condition amino acid exists as:

A

Cation

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181
Q

Which one of the following reagents is used for the identification of amino acids?

A

Ninhydrin

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182
Q

Which one of the following amino acids is basic in nature?

A

Lysine

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183
Q

Which one of the following is also called the silver mirror test?

A

Tollen’s Reagent

184
Q

In the formation of the Zwitter ion which one of the following donates the proton?

A

COOH

185
Q

Which one of the following is the simplest amino acid?

A

Glycine

186
Q

When acid is added to an amino acid, which one of the following will act as a base?

A

COO-

187
Q

Which one of the following is not carboxylic acid?

A

CnH2n+1Oh

188
Q

Pentanoic acid is:

A

Valeric acid

189
Q

Which one is not fatty acid

A

Phthalic acid

190
Q

Isobutyric acid is also written as:

A

2-Methylpropanoic acid

191
Q

Which of the following compound cannot be oxidized to carboxylic acid by the mild oxidizing agent

A

Ethanol

192
Q

Hybridization of functional carbon changes from ____ to ____ when converting to carboxylic from formyl

A

sp2 ➡ sp2

193
Q

Ethyl cyanide boiled with HCl in the presence of water gives:

A

Propanoic acid

194
Q

A molecule is oxidized to simple aliphatic carboxylic acid if the molecule gives a silver mirror but does not have an acid, identify the molecule

A

Propanal

195
Q

Hydrolysis of alkane nitriles for preparing carboxylic acids requires:

A

➡Acidic Conditions
➡Alkaline Conditions

196
Q

IUPAC name of CH3CN is:

A

Ethane Nitrile

197
Q

R-X + KCN ➡R-CN + KX is an example of:

A

Nucleophilic substitution Reaction

198
Q

Carboxylic acid decomposes bicarbonates with

A

Effervescence

199
Q

Ethyl alcohol reacts with which to give a product having pineapple flavour:

A

Butyric acid

200
Q

Which one is benzyl acetate:

A

CH3COOCH2C6H5

201
Q

Esterification is a reaction:

A

Condensation

202
Q

Which of the following do not give acetamide when react with ammonia:

A

Alkyl Nitrile

203
Q

Which one doesn’t convert carboxylic acid to acid halide:

A

Cl2

204
Q

During the formation of an ester from acetic acid, what actually happens:

A

Displacement of the OH- form the acid by OCH3

205
Q

Carboxylic acid reacts with ammonia to form salt

A

Ammonium Acetate

206
Q

Which of the following formula is more reactive for hydrolysis

A

-COCl

207
Q

2CH3COOH + Na2CO3➡X + CO2.
Identify “X” among the following

A

Sodium Ethanoate

208
Q

CH3COONH4➡CH3CONH2 + H2O
The above reaction is an example of :

A

Dehydration

209
Q

Ester used for banana flavouring is:

A

Amyl acetate

210
Q

Which of the following metal does not react with carboxylic acid

A

Cu

211
Q

IUPAC name of:CH3-CO-NH2

A

Ethanamide

212
Q

Pure organic acids are much:

A

Weaker than chloro substituted acids

213
Q

Here the strongest acid is:

A

➡CH3COOH❌
➡Cl-CH2-COOH✅
➡CH3CH2COOH❌
➡Br-CH2-COOH❌

214
Q

Carboxylic acid when dissolved in H2O produces H3O+ and :

A

Alkanoate ion

215
Q

Which of the following can react with NaHCO3:

A

Ethanoic acid

216
Q

Which of the following does not contain the COOH group:

A

Carbolic acid

217
Q

Which of the following acid is found in the stings of bees and ants:

A

Formic acid

218
Q

When a carboxylic acid is protonated, protonation occurs at:

A

Carbonyl oxygen atom

219
Q

Which of the following cannot be directly prepared from acetic acid:

A

Acetamide

220
Q

The reaction of acetic acid with sodium metal is:

A

Electrophilic substitution

221
Q

In glutaric acid HOOC-(CH2)n-COOH, the value of n is equal to:

A

3

222
Q

Which one is most acidic in nature:

A

Formic acid

223
Q

The highest melting point is of:

A

C3H7COOH

224
Q

The general formula of an aliphatic carboxylic acid is;

A

CnH2nO2

225
Q

Only the first four members of aliphatic acids are soluble in water due to:

A

CnH2nO2

226
Q

Only the first four members of aliphatic acids are soluble in water due to;

A

Hydrogen Bonding

227
Q

The name of compound HOOC9CH2)4COOH is:

A

Adipic acid

228
Q

Carboxylic acid are converted in respective alkanes in the presence of;

A

HI/P

229
Q

Which of the following compound will convert acetic acid to acetyl chloride:

A

PCl5

230
Q

Acetic acid undergoes reduction with LiAlH4 to give:

A

Ethanol

231
Q

Ethanoic acid reacts with ethanol to give:

A

Ethyl acetate

232
Q

What is obtained if n-propyl acetate is boiled with aqueous sodium hydroxide

A

C3H7OH

233
Q

Which of the following is a cyclic carboxylic acid:

A

Phthalic acid

234
Q

If amyl butyrate is added to a liquid, it will develop a flavour of :

A

Apricot

235
Q

Which of the following is not carboxylic acid?

A

CnH2n+1Oh

236
Q

If the methyl group of propane is replaced by a carboxylic resulting molecule is:

A

Malonic acid

237
Q

Which of the following is an unsaturated aliphatic organic acid

A

Malic acid

238
Q

Pentanoic acid is;

A

Valeric acid

239
Q

Which one is a carboxylic acid

A

Palmitic acid

240
Q

Which one is not fatty acid

A

Phthalic acid

241
Q

Organic acid which cannot be obtained by hydrolysis of ats:

A

Succinic acid

242
Q

Isobutyric acid is also written as:

A

2-Methylpropanoic acid

243
Q

The compound that was first isolated by red ants;

A

Formic acid

244
Q

By oxidation of which compound carboxylic acid cannot be obtained

A

2-Methyl, 2-Propanol

245
Q

Which of the following compound cannot be oxidized to carboxylic acid by the mild oxidizing agent

A

Propanone

246
Q

A compound oxidized to x, by further oxidation o x if the resulting compound is butyric acid, starting compound can be;

A

Butanol

247
Q

Alkane nitriles on boiling with which type of acid gives organic acids:

A

Mineral

248
Q

Hybridization of functional carbon changes from _____ to _____ when converting to carboxylic.

A

sp ➡sp2

249
Q

Metallic cyanides give alkyl cyanides in the presence of:

A

Base

250
Q

Gas released by acid hydrolysis of alkyl nitriles;

A

H2

251
Q

Ethyl cyanide boiled with HCl in the presence of water gives:

A

Propanoic acid

252
Q

Which member from simple, primary alkyl halides give butyric acid by acid hydrolysis

A

3rd

253
Q

Oxidation of 2-Pentanone by strong oxidizing agents gives:

A

Propanoic acid, Ethanoic acid

254
Q

Which member form simple, primary alkyl halides give butyric acid by acid hydrolysis:

A

3rd

255
Q

Oxidation of 2-Pentaone by strong oxidizing agents gives:

A

➡Ethanoic acid
➡Propanoic acid
(Cleavage of the ketonic group from that side of carbonyl which contains a higher number of hydrogen atoms)

256
Q

A molecule is oxidized to simple aliphatic carboxylic acid if the molecule gives a silver mirror but does not behave as an acid, identify the molecule

A

Propanol

257
Q

Which metal does not release hydrogen gas from valeric acid

A

Pb

258
Q

Potassium carbonate decomposed by acetic acid release gas, the nature of gas is;

A

Neutral

259
Q

Which of the following cannot show the acidic nature of carboxylic acids

A

➡Alkali metals
➡Alkaline Earth metals
➡Alkali metal carbonates

260
Q

Carboxylic acid decomposes bicarbonates with;

A

Effervescence

261
Q

Which group of carboxylic acids is active for the reaction alkali carboantes:

A

H-atom

262
Q

Which reaction can be used in artificial juices formation with carboxylic acids:

A

Esterification

263
Q

The addition of ethyl alcohol in protonated acetic acid is:

A

Nucleophilic

264
Q

Ethyl alcohol reacts with which to give a product having pineapple flavour:

A

Butyric acid

265
Q

Which one is benzyl acetate:

A

C6H5CH2COOH3

266
Q

Benzyl alcohol and acetic acid give a compound with ___ fragrance

A

Jasmine

267
Q

Esterification is a reaction:

A

Condensation

268
Q

Ammonium acetate converts to acetamide by

A

➡Dehyrdation
➡Heating

269
Q

Which of the following represents acid amide:

A

CH3CONH2

270
Q

Carboxylic acid derivative having least reactive is:

A

Acid Amide

271
Q

Which sequence of groups replaces OH of a carboxylic acid with halides, esters and amides respectively?

A

➡X
➡OR
➡NH2

272
Q

Which one doesn’t convert to acid halide:

A

Cl2

273
Q

Which gas is released during acid halide formation with the help of thionyl chloride:

A

SO2

274
Q

Which factor decreases the strength of carboxylic acid:

A

Branching

275
Q

The strongest acid among the following is;

A

➡CH3CH2COOH❌
➡CH3CCl2COOH✅
➡CH3CHClCOOH❌
➡CH3CH(NH2)COOH❌

276
Q

Acetic acid can be prepared by ethanol under:

A

Oxidizing conditions

277
Q

Ethanoic acid manufactured through ethanol involves the use of:

A

Acidified potassium dichromate

278
Q

If ethanoic acid is to be prepared by hydrolysis of alkane nitriles, which of the following can be the reagent to be hydrolyzed

A

CH3CN

279
Q

Hydrolysis of alkane nitriles for preparing carboxylic acids requires:

A

Acidic Conditions

280
Q

Hydrolysis of CH3CH2CN will synthesize:

A

Propanoic acid

281
Q

The production of acid amide involves the reaction of ethanoic acid with:

A

Ammonia

282
Q

Which of the following can be the reagent to produce acetyl chloride from ethanoic acid:

A

➡Thionyl Chloride
➡NaCl

283
Q

During the formation of an acetyl chloride from ethanoic acid, what actually happens:

A

Attachment of Cl with the carbonyl carbon

284
Q

During the formation of an ester from acetic acid, what actually happens:

A

Displacement of the OH from the acid by NH2

285
Q

During the formation of an acid amide from ethanoic acid, what actually happens:

A

Displacement of the OH- from the acid by OCH3

286
Q

The stronger acid among the following is:

A

➡Cl3CCOOH✅
➡Cl2CHCOOH❌
➡ClCH2COOH❌
➡CH3COOH❌

287
Q

If NaOH is added to an unknown organic compound and the reaction evolves into ammonia, then this unknown organic compound is most likely to:

A

A carboxylic acid

288
Q

Organic acids are considered as;

A

Weak acids

289
Q

The strength of the organic acids and chloro substituted acids is measured by the pKa scale such that a smaller value of pKa corresponds to:

A

Stronger acid

290
Q

Alkane nitriles can be prepared by treating alkyl halide with:

A

Potassium Cyanide

291
Q

Ethanoic acid can be prepared by hydrolysis of:

A

Methane nitrile

292
Q

Carboxylic acids react with active metals to form their sal;

A

H2 gas

293
Q

Which pair can be used as a reactant for the preparation of acetyl chloride:

A

➡CH3COOH, SOCl2
➡CH3COOH, PCl5

294
Q

For producing a carboxylic acid derivative. The addition of a nucleophile to the carboxyl group is always followed by displacement of:

A

H atom

295
Q

Which statement is incorrect about the formation of ester

A

➡When carboxylic acids are heated with alcohols esters are formed❌
➡Esters have a fruity smell❌
➡Esters are used as artificial sweeteners❌
➡Ester are formed in the presence of NaOH✅

296
Q

Carboxylic acid reacts with ammonia to form salt

A

Acetic anhydride

297
Q

Which ester s used as orange flavour:

A

Benzyl acetate

298
Q

Propanoic acid is produced from ___ on acid hydrolysis

A

Ethyl cyanide

299
Q

Esters are

A

Neutral

300
Q

Here the strongest acid is:

A

Cl-CH2-COOH

301
Q

Which of the following formula is more reactive for hydrolysis:

A

-COCl

302
Q

The work on concentrated H2SO4 in the esterification process is as:

A

Catalyst

303
Q

The solubility of carboxylic acid in water gradually decreases with:

A

Increase in the molecular mass

304
Q

Acetyl chloride is soluble in which solvent

A

➡Acetone
➡Ether

305
Q

The acidic character of amino acids is due to:

A

Amino group

306
Q

The amino acids that are synthesized within our body naturally are called:

A

Non-Essential amino acids

307
Q

Which of the following will produce CO2 while reacting with sodium carbonate:

A

Carboyxlic acid

308
Q

When a carboxylic acid is protonated, protonation occurs at:

A

Carbonyl oxygen atom

309
Q

Which one is more acidic in nature:

A

Formic acid

310
Q

Ethanoic acid reacts with ethanol in the presence o H2SO4 to give:

A

Ethyl ethanoate

311
Q

Formation of ethanoyl chloride from ethanoic acid is an example of:

A

Nucelophilic substituton

312
Q

The IUPAC name of phthalic acid is:

A

1,2-benzenedcarboxylic acid

313
Q

-COOH is reduced to -CH3 in the presence of:

A

HI/P

314
Q

Acetic acid exist as cyclic dimer in benzene due to ___ with ___ atoms in the ring.

A

➡Hydrogen Bonding
➡Eight

315
Q

Weaker acid among the following is:

A

ICH2COOH

316
Q

The reacton of carboxylic acid with sodium metal to form salt with evolution of H2 gas. t is an example of:

A

Electrophilic Substituton

317
Q

Ethanoic acid reacts with all of these to produce water except:

A

Sodium

318
Q

Carboxylic acid can be prepared by the action of Grignard’s Reagent with:

A

CO2

319
Q

In the presence of hot alkaline potassium permanganate solution 2-butene will give:

A

Two moles of ethanoic acid

320
Q

Velaric acid is obtained from a herb velarian, its IUPAC name is:

A

Pentanoic acid

321
Q

The process of acid hydrolysis may be used to obtain:

A

Pentanoic acid

322
Q

The process of acid hydrolysis may be used to obtain:

A

Amino acid from proteins

323
Q

Ammonia on reaction with acetic acid followed by heating gives:

A

Acetamide

324
Q

Ethane nitrile undergoes acid-hydrolysis to give:

A

Propanoic acd

325
Q

X an Y combined to gve ompound Z. Orgnaic compounds X,Y and Z can be?

A

X➡ Alcohol
Y➡ Acid
Z➡ Ester

326
Q

Aromatic carboxylic acid can be prepared by the oxidation of alkyl benzene, when treated with:

A

➡Alkaline KMnO4
➡Acidic K2Cr2O7
➡Dilute HNO3

327
Q

In esterification reaction which bond for RCOOH breaks while reaction with alcohol:

A

C-H

328
Q

The general formula of aliphatic carboxylic acid is:

A

CnH2nO2

329
Q

Amyl butyrate will develop a flavor of:

A

Apricot

330
Q

The reacton of carboxylic acid with alcohol in the presence of H2SO4 is the example of ____ reaction.

A

Nucleophilic Substitution

331
Q

Number of oxygen atoms present in cyclic dimer of acetic acid.

A

4

332
Q

Which of the following gives electrophilic substitution reaction with carboxylic acid

A

➡Na
➡NaOH

333
Q

Which of teh following is the strongest acid?

A

Cl3CCOOh

334
Q

Identify the correct order of acidic strength:

A

Carboxylic acid > Phenol> Water> Alcohol

335
Q

Which oen is aliphatic dicarboxylci acid:

A

Oxalic acid

336
Q

When ethanoic acid reacts with PCl5, the products formed are;

A

CH3COCl + POCl3 + HCl

337
Q

Which of the following is not a fat acid

A

Benzoic Acid

338
Q

The boiling points of carboxylic acids are ____ than their corresponding alkanes.

A

High due to hydrogen bonding

339
Q

Carboxylic acids are dehydrated on heating strongly in the presence of phosphorus pentoxide product will be;

A

Acid Anhydride

340
Q

Which of the folloiwng is the weakest acid?

A

➡CH3COOH✅
➡ClCH2COOH❌
➡Cl2CHCOOH❌
➡Cl3COOH❌

341
Q

Which of the following acids cannot be prepared directly from carboxylic acid?

A

Acid Amide

342
Q

All of the following methods are used to prepare acid anhydride?

A

Dehydration of carboxylic acid with P2O5

343
Q

Which one of the following organic acids is the most reactive and the strongest acid?

A

➡HCOOH

344
Q

Which of the followign halosubstituted carboxylic acids is the strgonest acid?

A

FCH2COOH

345
Q

Organic compounds ‘X’ and ‘Y’ both can react with Na-metal to evolve hydrogen gas. ‘X’ and ‘Y’ react with each other to form an organic compound ‘Z’ which gives fruity smell. What types of compounds ‘X’, ‘Y’ and

A

➡X: Alcohol
➡Y: Acetic Acid
➡Z: Ester

346
Q

All of the following are optically active α-amino acids EXCEPT:

A

➡Glycine✅
➡Aspartic acid❌
➡Valine❌
➡Alanine❌

347
Q

When an alkali is added to solution of α-amino acids, ___ releases the proton. Therefore, the acidic character is due to?

A

-NH3+

348
Q

α-amino acids are required for the synthesis of proteins.
These α-amino acids are sub-classified according to how
the properties of other functional groups in the side
chain (R-group) influence the system. Which of the
following is not justified class of α-amino acid under the
given condition:

A

Acidic (side chain e.g. HCl)

349
Q

All of the following are uses of ethanoic acid EXCEPT:

A

➡ Used as coagulant for latex in rubber industry❌
➡Used as a local irritant in medicine❌
➡Used in the manufacture of pickles❌
➡Used as an antiseptic in nasal infection ✅

350
Q

Which of the followings has comaparatively less acidic character

A

Ethanol

351
Q

Which reaction does not produce benzoic acid

A

➡By hydrolysis of C6H5CO2C2H5❌
➡By hydrolysis of C6H5CN❌
➡By oxidation of toluene❌
➡By oxidation of phenol ✅

352
Q

Which class of organic compounds is used for artificial flavorings in jams?

A

Ester

353
Q

Which of the followign compounds would react readily with NaOH?

A

RCOOH

354
Q

Amino acids have all of the following porperties EXCEPT:

A

➡They are colorless, crystalline solids❌
➡They have low melting points✅
➡They are soluble in water❌
➡They behave like salts rather than simple amides and
carboxylic acid❌

355
Q

Which of the followign carboxylic acids is prepared by acid hydrolysis of ethane nitrile?

A

Ethanoic acid

356
Q

Mark the incorrect statemnet about α-amino acids:

A

➡They all have chiral carbon except glycine❌
➡They are all L-amino acids❌
➡10 amino acids are called non-essential or dispensable
amino acids❌
➡Polypeptides act as acid only ✅

357
Q

Which of the following methods is used to prepare amines (mixture of amines) on the commercial scale?

A

Hofmann’s Method

358
Q

Dehydration of an acid amide gives:

A

Cyanide

359
Q

Hoffmann’s bromamide reaction is used to prepare __- amine from amides.

A

1°

360
Q

For which of the following type of amines carbylamine test gives positive reaction:

A

Primary Amine

361
Q

The correct order of basic nature of the following:
CH3NH2, (CH3)2NH, (CH3)3N and NH3 is:

A

(CH3)2NH> CH3NH2> (CH3)3N> NH3

362
Q

Reaction of ethanoc acdi with ammonia gives;

A

Ethane amide

363
Q

Which of the following compounds is expected to be strongest base?

A

Ethylamine

364
Q

Which of the following types of isomerism is not shown by aliphatic amines?

A

Tautomerism

365
Q

Which of the following derivatives of carboxylic acid is the most reactive?

A

Acid Halide

366
Q

In which of the following reactions acid chloride produces aldehyde?

A

Reaction with H2

367
Q

Which of the following method is/are not used to prepare priamry amines?

A

By the reacton of Grignard reagent with NH3

368
Q

On the acid hydrolysis of acid amide, which of the following product is obtained;

A

Carboxylic acid

369
Q

Which of the following derivatives of carboxylic acid is least reactive?

A

Acid amide

370
Q

The reacton of carboxylic acids with alcohols n presence of conc. H2SO4 is called;

A

Esterificaton

371
Q

Which one of the following given the correct order of acid strength (strongest
first) for ethanoic acid, chloroethanoic acid and phenol?

A

CH2ClCO2H> CH3CO2H> C6H5OH

372
Q

Acetic acid can be prodcued by the reaction of “A” with CH3CL followed by acid hydrolysis. The “A” is;

A

KCN

373
Q

2-Butene heated with alkaline or acidic KMnO4 forms ____

A

Ethanoic acid

374
Q

Carboxylic acid reacts with sodium hydroxide to fomr salt, belong to _____ reaction.

A

Electrophilic Substitution

375
Q

Propanoic acid liberates CO2 from Na2CO3. The carbon of CO2 comes from:

A

Carbonate ion

376
Q

Which of teh followin is not a fatty acid?

A

Oxalic acid

377
Q

The reaction of carboxylic acid in which hydrogen atom of carboxyl group is involved

A

Reaction with Na metal

378
Q

The pure acetic acid freezes to an ice like solid at:

A

298

379
Q

Which of the following is strongest acid

A

Methanoic acid

380
Q

Which of the following is the weakest acid:

A

Acetic acid

381
Q

Select the carboxylic acid which has differnet smell from others;

A

Butyric acid

382
Q

The correct order of decreasing acid strength of A=trichloroacetic acid, B =dichloroacetic acid, C = chloroacetic acid and D = acetic acid is

A

A> B> C> D

383
Q

Ethane nitrile on boiling with mineral acids or alkalies yields corresponding

A

Ethanoic acid

384
Q

How many grams of sodium metal are used with ethanoic acid to form one moel of H2 gas

A

46

385
Q

Propanoic acid on reduction with HI and red phosphorus gives:

A

Propane

386
Q

The alkyl group present in an ester having raspberry flavor is:

A

Isobutyl

387
Q

The reducing agent for reduction of an ester is;

A

LiAlH4

388
Q

The organic acid which ahs almost same boiling point as water as at standard pressure is

A

HCOOH

389
Q

On complete reduction of CH3-COOH. The underlined group after reduction changes into;

A

-CH3

390
Q

Acetic acid is miscible with all proportions in:

A

➡Water
➡Alcohol
➡Ether

391
Q

The number of carbon atoms involved in a dimer molecule of acetic acid are;

A

4

392
Q

Propanedioic acid is the IUPAC name of:

A

Malonic acid

393
Q

Which of the following derivative of carboxylic acid is more reactive.

A

Acetyl Chloride

394
Q

The dilute solution of ___ is called vinegar

A

Acetic acid

395
Q

Ammonia on eraction with acetic acid followed by heating gives;

A

Acetamide

396
Q

Propane nitrile undergoes acid-hydrolysis to give:

A

Propanoic acid

397
Q

Carboxylic acid on reaction with LiAlH4 are reduced to;

A

Alcohol

398
Q

Reaction of CH3COOH with PCl5 is an example of ___ reaction.

A

Nucleophilic substitution

399
Q

___ cannot be prepared directly from acetic acid

A

Acetamide

400
Q

C2H5OH + CH3COOH CH3COOC2H5 + H2O
Which of the following catalyst is used in the above reaction

A

Conc. H2SO4

401
Q

Which of the followign compounds will react with NaOH, Na2CO3 and PCl5

A

CH3COOH

402
Q

Compounds having -C≡N group are called;

A

Nitriles

403
Q

Acetamide is prepared by:

A

Heating ammonium acetate

404
Q

An aqueous solution of an organic compound reacts with sodium carbonate to produce carbon dioxide gas. Which one of the following could be the
organic compound?

A

CH3-CH2-COOH

405
Q

A food chemist wants to create the odour of pineapple for a product. An ester with this odour has the formula C3H7CO2C2H5. The reactants are

A

➡C2H5OH
➡C3H7CO2H

406
Q

C17H35COO-Na+ s sodium salt of fatty acid, its solubility is:

A

Higher than fatty acid

407
Q

C6H5COOH is the chemical formula of:

A

Benzoic acid

408
Q

Which of the following has maximum number of carbon atoms:

A

➡Succinic acid❌
➡Adipic acid✅
➡Oxalic acid❌
➡Malonic acid❌

409
Q

The number of atoms present in the ring of dimer of acetic acid in benzene solvent are;

A

8

410
Q

Which one is aliphatic dicarboxylic acid:

A

Oxalic acid

411
Q

The solution of which acid is used for seasoning of food:

A

Acetic acid

412
Q

Which of the following will give positive bromine water test:

A

Maleic acid
(Maleic acid have double bond)

413
Q

Ammonium acetate on strong heating gives:

A

Acetatamide

414
Q

Banana flavor is given by:

A

Amylacetate

415
Q

The dehydration of the carboxylic acids in the presence of P2O5 and strong heating yields:

A

Anhydride

416
Q

Which of the following is fatty acid:

A

➡Formic acid
➡Palmitic acid
➡Stearic acid

417
Q

Which of the following is most acidic in nature:

A

Nitroacetic acid

418
Q

The highest melting point is of:

A

C3H7COOH

419
Q

Which of the following will give acetic acid on acid hydrolysis:

A

CH3CN

420
Q

Which of the following is a cyclic carboxylic acid:

A

Phthalic acid

421
Q

Carboxylic acids are soluble in benzene forming cyclic dimers. The number of carbon atoms in the dimmeric ring are:

A

2

422
Q

Which of the followign is a polyproticacid:

A

Oxalic acid

423
Q

Which of the followings is the acetic acid?

A

CH3COOH

424
Q

Which of the followings is the malonic acid and also polyprotic acid?

A

CH2(COOH)2

425
Q

C15H31COOH is the chemical formula of:

A

Palmitic acid

426
Q

C6H4(COOH)2 is the chemical formula of:

A

Phthalic acid

427
Q

CH3CH2CHCOOH is the chemical formula of:

A

➡Butanoic acid
➡Butyric acid
➡Propyl carboxylic acid

428
Q

A carboxylic acid contains:

A

Carboxyl Group

429
Q

Formic acid was first isolated from:

A

Red ant

430
Q

Butyric acid was first isolated from:

A

Butter

431
Q

Grignard’s Reagent gives carboxylic acid with:

A

CO2

432
Q

The solubility of carboxylic acids with the increase in the no. of carbons and hydrogens.

A

Decreases

433
Q

Even carboxylic acids have ___ melting point than the next lower and higher members having odd carbon atoms:

A

Higher

434
Q

Which of the following is the weaker acid?

A

➡HCl❌
➡H2SO4❌
➡CH3COOH✅

435
Q

2-Butene when heated with alkaline KMnO4 gives:

A

Carboxylic acid

436
Q

Glacial acetic acid freezes to ice like solid at:

A

17°C

437
Q

Phthalic acid is also called;

A

1,2-benzenedicarboxylic acid

438
Q

The carboxylic acids which are liquid with pungent smell have number of carbons

A

C1-C3

439
Q

The general ormula of aliphatic carboxylic acid is:

A

CnH2nO2

440
Q

Only first four members of aliphatic acids are soluble in water due to:

A

Hydrogen Bonding

441
Q

C17H35COO-Na+ is sodium salt of a ____.

A

Stearic acid

442
Q

Hydrolysis of alkane nitriles with mineral acids or alkali yields:

A

Carboxylic acid

443
Q

Which of following is cannot be directly prepared from acetic acid:

A

➡Acetamide✅
➡Acetic anhydride❌
➡Ethyl acetate❌
➡Acetyl chloride❌

444
Q

Acetic acid undergoes reduction with LiAlH4 to give:

A

Ethanol

445
Q

What is obtained if n-propyl acetate is boiled with aqueous sodium hydroxide:

A

C3H7OH

446
Q

If benzyl acetate is added to a liquid, it will develop a flavour of:

A

Jasmine

447
Q

Raspberry flavor is given by:

A

Isobutylformate

448
Q

Pineapple flavor is given by:

A

Ethylbutyrate

449
Q

Orange flavor is given by:

A

Octylacetate

450
Q

Carboxylic acids yields ___ on reaction with alcohols in the presence of conc. H2SO4

A

Ester

451
Q

An aqueous solution of an organic compound reacts with Na2CO3 to produce O2 gas. The organic compound is:

A

CH3-CH2-COOH

452
Q

Acetamide is prepared by:

A

Heating CH3COOH4

453
Q

Organic compounds having fruity smell are;

A

Esters

454
Q

The derivative of carboxylic acid is:

A

➡Acid chloride (CH3COl)
➡Acid amide (CH3CONH2)
➡Ester

455
Q

2-Hydroxylpropanoic acid is called _____ and 2,3-Dihydroxybutanedioic acid is called___.

A

➡Lactic acid
➡Tartaric acid

456
Q

Acetic acid can be manufactured by ___ of carbohydrates.

A

Fermentation

CHEMISTRY (19 decks)

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