UNIT#18 CARBOXYLIC ACIDS Flashcards
The general formula for carboxylic acid is:
CnH2nO2
Which of the following is an unsaturated carboxylic acid:
Maleic acid
Acetic acid exists as a dimer in benzene due to:
Hydrogen Bonding
An acid with an unpleasant smell:
Butyric acid
Glacial acetic acid at low temperature is a:
Ice like solid
Which of the following is an unsaturated aliphatic organic acid
Maleic acid
Which one is a carboxylic acid?
Palmitic acid
Organic acid which cannot be obtained by hydrolysis of fats
Succinic Acid
(Fats on hydrolysis give unsaturated fatty acids)
By oxidation of which compound carboxylic acids cannot be obtained
2-Methyl-2-Propanol
A compound is oxidized to X, by further oxidation of X if the resulting compound is butyric acid, starting compound can be:
Butanol
Alkane nitriles on boiling with which type of acid gives organic acids
Mineral Acids
If ethanoic acid is to be prepared by hydrolysis of alkane nitriles, which of the following can be the reagent to be hydrolyzed?
CH3CN
ALkane nitriles can be prepared by treating alkyl halide with:
Alcoholic potassium cyanide
Propanoic acid is produced from ___ on acid hydrolysis.
Ethyl cyanide
Potassium carbonate is decomposed by acetic acid and releases a gas, the nature of the gas is:
Acidic
Which group of carboxylic acids is active for reaction with alkali metal carbonates?
H-atom of OH group
Which reaction can be used in artificial juices formation with carboxylic acids
Esterification
The addition of ethyl alcohol in protonated acetic acid is:
Nucleophilic addition
Benzyl alcohol and acetic acid give a compound with ___ fragrance.
Jasmine
Ammonium acetate converts to acetamide by:
➡Heating
➡Dehydration
Which of the following represents acid amide
CH3CONH2
Which sequence of groups replaces OH o carboxylic acid with halides, esters and amides respectively?
➡X
➡OR
➡NH2
Which gas is released during acid halide formation with the help of thionyl chloride and carboxylic acids
SO2
During the formation of an acid amide from ethanoic acid, what actually happens:
Displacement of the -OH from the acid by -NH2
Carboxylic acids react with active metals (Na, K, Ca and Mg) to form their salt and :
H2 gas
Which pair can be used as a reactant for the preparation of acetyl chloride:
➡CH3COOH, PCl5
➡CH3COOH, SOCl2
For the production of a carboxylic acid derivative. The reaction of nucleophilic to carboxyl group is always followed by the displacement of :
-OH group
The work of concentrated H2SO4 in the esterification process is as:
➡Dehydrating agent
➡Catalyst
Acetyl chloride is soluble in which solvent:
➡Water
➡Ether
Which of the following is not an example of an electrophilic substitution reaction?
➡Reaction of CH3COOH and Na❌
➡Reaction of CH3COOH and NaHCO3❌
➡Reaction of CH3COOH and Na2CO3❌
➡Reaction of CH3COOH and PCl5✅
Identify reversible reactions among the following.
➡Esterification✅
➡Acid Halide Formation❌
➡Acid Anhydride Formation❌
➡Acid Amide Formation❌
Ethyl butyrate is an ester formed by the combination of __ and butyric acid.
Ethyl Alcohol
By product produced during hydrolysis of alkane nitrile in the basic medium is:
NH3
2CH3COOH + x Ca ➡Ca(OCOCH3)2. Calculate value of ‘x’.
1
Which of the following carboxylic acid derivative is the least reactive?
Acid Amide
The stronger acid among the following is:
➡Cl3CCOOH✅
➡ClCH2COOH❌
➡Cl2CHCOOH❌
➡CH3COOH❌
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:
Stronger acid
Organic acids (Carboxylic acids) are considered as:
Weak acids
Identify the strongest conjugate base among the following:
➡OH-❌
➡RCOO-❌
➡-OR✅
➡PhO-❌
The fruity smell of organic compounds is because of;
Ester
From which of the following sources, acetic acid was first isolated?
Vinegar
Acetic acid is used to prepare:
➡Acetone
➡Acetate
➡Esters
Which is formed when hydrogen is added to the carboxylic group?
Methane
A number of oxygen in the cyclic ring of a dimer of carboxylic acid are:
4
Which of the following is used in perfumes
Alcohol
Which is formed when hydrogen is added to the carboxylic group in presence of HI in phosphorus
Ethane
Acetic acid s used to prepare:
➡Acetone
➡Acetate
➡Esters
Which s dibasic carboxylic acid
Oxalic acid
In benzene, carboxylic acids exist as ____?
Dimers
Which of the following catalyst is used for the preparation of acidic anhydrides?
P2O5
The reaction of carboxylic acids which involve H atom removal of OH group from _____ as major products in all reactions?
Salts
Which of the following are most soluble in water?
Ethanoic acid
Formic acid is obtained from:
Ant’s sting
When two carboxylic acids are strongly heated in the presence of P2O5, which product is formed?
Acid Anhydrides
Which of the following is a carboxylic acid derivative?
Acyl Halide
Which of the following is the weaker acid?
CH3COOH
How carboxylic acids are formed from alcohol?
Oxidation
Acetic acid is also named as:
Ethanoic acid
The flavour of amyl butyrate?
Apricot
All are aliphatic carboxylic acids except:
➡Methanoic acid❌
➡Ethanoic acid❌
➡Benzoic acid✅
➡Lactic acid❌
Which of the following causes a complete reduction of a carboxylic acid into alkanes?
HI/P
Another name for oxalic acid is:
Ethanedioic acid
Which one of the following is not fatty acid
Phthalic acid
Carboxylic acid with alcohol is called:
Esterification
Amino acid and alcohol are mixed which product will be formed?
Ether
Phthalic acid is:
Dicarboxylic acid
When fat reacts with NaOH, the reaction is called:
Saponification
Which of the following is used as a coagulant for latex in the rubber industry:
Acetic acid
Glycine is an amino acid which is present in solution as:
Zwitter ion
The reverse of esterification is:
Hydrolysis
Phthalic acid:
Dicarboyxlic aromatic acid
Which one is a weak acid:
➡Acetic acid❌
➡Formic acid❌
➡Propanoic acid❌
➡Butanoic acid✅
Hydrolysis of cyano group by aqueous acid results into;
Carboxylic acids
Which of the following compounds in the form of an aqueous solution will produce CO2 on reaction with sodium carbonate?
C2H5CO-CO
CH3CN + HCl ➡A + B in presence of water in the above reaction will produce CO2 in reaction with sodium carbonate:
➡Acetic acid
➡Ammonium chloride
Consider the following reaction CH3COOH + Mg(metal) ➡? What product will form:
Magnesium Acetate
CH₃COOH + PCl5 ➡ the products of the above reaction are:
CH₃COCl + POCl₃ + HCl
The -NH-CO group is called;
Amide group
When CH3-CH2-Oh is oxidized in the presence of K2Cr2O7 and H2SO4, the product formed is:
CH₃COOH
When ethanoyl chloride reacts with methylamine an amide is formed. What is the structure of it amide formed?
CH3-CO-NHCH3
The relative strength of alcohol, phenol, water and carboxylic acids is;
Carboxylic acids > Phenol > Water > Alcohol
Methyl cyanides, on boiling with mineral acids or alkalies, yield:
Acetic acid
The formation of ester from acetic acid in presence of acid and ethanol is a:
Nucleophilic substitution reaction
CH3-COOH + NH3 ➡
The final products formed are:
CH3-CO-NH2 + H2O
Ethyl butyrate and butyl butanoate are esters with the flavour of:
Pineapple
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
➡X: Alcohol
➡Y: Acetic Acid
➡Z: Ester
An organic acid ‘z’ reacts completely with sodium bicarbonate, sodium hydroxide and sodium carbonate. Which of the following represents the structure of ‘z’.
H3C-CH2-COOH
CH3COOH + CH3CH2OH ➡ CH3COOC2H5 + H2O
Which of the following will act as a catalyst in the above reaction?
H2SO4
Which of the following reaction of a carboxylic acid is reversible?
Esterification
The order of the acid strength is:
CCl3COOH> CHCl2COOH> CH2ClCOOH> CH3COOH
Compounds having -C≡N group are called;
Nitriles
The final product of hydrolysis of nitrile yield:
Carboxylic acid
During esterification, the bond from alcohol that breaks in between:
Oxygen and Hydrogen
C2H5OH + CH2COOH ➡CH3COOC2H5 + H2O
Which of the following catalyst is used in the above reaction?
Conc. H2SO4
Which product s formed by the reaction of a carboxylic acid with alcohol?
Ester
Which one will act as a strong acid?
Trichloroethanoic acid
Acetyl chloride(Ethanoyl chloride) is used in the synthesis of organic compounds. It is prepared by treating acetic acid with:
SOCl2
What will be the outcome of the reaction of methanol with ethanoic acid in the presence of concentrated sulphuric acid?
Methyl ethanoate is formed
Which one o the following compounds can exist in the form of cyclic dimers?
A carboxylic acid
The reagent used to reduce a carboxylic acid to an alkane is:
NaBH4
Which of the following is not a fatty acid?
Phenylacetic acid
Select the correct order of acids’ strength.
CHCl2COOH>CH2ClCOOH>CH3COOH
Which compound shows the highest boiling point?
➡CH3COOH✅
➡C2H5OH❌
➡C2H5-O-C2H5❌
➡(CH3CH2)3N❌
Which one is more reactive?
➡Ester❌
➡Acid Halide✅
➡Amide❌
➡Acid Anhydride❌
Nitriles (RCN) on hydrolysis in the presence of mineral acid yield:
Carboxylic acids
Carboxylic acids can be reduced into corresponding alcohols. Which of the following reagent can be used for this purpose?
LiAlH4
Which of the following reagent is required for the preparation of acyl chloride (CH3COCl) from ethanoic acid
PCl5
Which o the following is the strongest acid?
➡Propanoic acid❌
➡Fluoroethanoic acid❌
➡Trichloroethanic acid✅
➡Nitroethanoic acid❌
Hydrolysis of acyl chloride results in the formation of:
Carboxylic acids
The exact reactivity order for carboxylic acid derivatives is;
Acyl Chloride > Anhydride > Ester
A carboxyl acid contains a functional group:
a carboxyl group
Of the following carboxylic acids which acid has higher acidity;
➡Nitroethanoic acid✅
➡Ethanoic acid❌
➡Propanoic acid❌
➡Chloroethanoic acid❌
Which reagent is used to reduce carboxylic acid?
LiAlH4
Stronger acid is;
HCOOh
Acetamide is prepared by:
Heating ammonium acetate
Carboxylic acids react with the metal to form salts with the evolution of:
H2
Ethane-1,2-dioic acid is also called:
Oxalic acid
The carboxylic acid can be prepared by the action of Grignard’s reagent with:
CO2
The IUPAC name for formic acid is:
Methanoic acid
The reaction of alcohol with acetic acid is known as:
Esterification
Esters are formed by the reaction of carboxylic acids with:
Alcohols
Which one of the following has both hydroxyl and carboxylic acid groups?
Salicyclic acid
Which of the following cannot be prepared directly from acetic acid?
Acetamide
The reaction between caustic soda and fat is called:
Saponification
When a carboxylic acid reacts with alcohol, it produces a new class of compounds:
Esters
Which of the following is α-hydroxy acid?
➡Stearic acid❌
➡Picric acid❌
➡Lactic acid✅
➡Iso-butyric acid❌
Which of the following has the highest solubility in water?
➡Acetic acid✅
➡n-butyric acid❌
➡Iso-butyric acid❌
➡Propionic acid❌
Carboxylic acids do not give the characteristic reactions of:
Alkyl part
Acetic acid shows a molecular mass of 120 when dissolved in benzene. This is because of:
Dimerisation
Which of the following produces violet colour with FeCL3 solution?
Picric acid
Which of the following is present in Vinegar?
Acetic acid
Acetic acid reacts with PCl5 to form:
CH3COCl
The fatty acid which shows the reducing properties is:
Acetic acid
Among the following acids which have the lowest pKa value:
➡CH3CH2COOH❌
➡HCOOH✅
➡(CH3)CH-COOH❌
➡CH3COOH❌
Which of the following is not a dicarboxylic acid?
➡Oxalic acid❌
➡Malonic acid❌
➡Adipic acid❌
➡Valeric acid✅
Which of the following are generally used in the preparation of artificial flavours?
Esters of lower fatty acids
Which of the following will reduce carboxylic acid to 1° alcohol?
LiAlH4
An example of a Zwitter ion is:
Alanine
α-Amino acids behave as crystalline ionic solids and have a high melting point due to the presence of:
Both -NH2 and -COOH group
Which of the following compounds does not have a carboxyl group
Picric acid
Which of the following is the strongest acid?
➡HCOOH✅
➡C6H5COOH❌
➡CH3COOH❌
➡CH3CH2COOH❌
When sodium formate is heated with soda lime, it forms:
CH4
Which is used to remove ink and rust stains on cloth:
Oxalic acid
Vinegar contains:
6 to 10% acetic acid
When acetyl chloride reacts with any amine, the reaction is known as:
Acetylation
Formic acid and acetic acid may be distinguished by reaction with:
Dilute acidic permanganate
Stingers of bees and wasps contain:
Formic acid
The name glacial acetic acid is given to pure acetic acid:
It forms ice like solid below 17°C
Which of the following is used in the baking powder:
Tartaric acid
Acid is obtained as a result reaction between a Grignard reagent and:
CO2
Some amino acids are most important because they are the final product of hydrolysis of peptide bond proteins and they are:
α-amino acid
An amino protein is transferred from one point to the other point and this dipolar ion is called;
Zwitter Ion
Which of the following reaction is/are shown by carboxylic acid?
➡Acid base Reaction
➡Nucleophilic Substitution Reaction
➡Reaction involving carboxyl group as a whole
Which of the following ester give the flavour of jasmine:
Benzyl Acetate
The dilute solution of ___ is called vinegar.
Acetic acid
An organic compound containing both amine and carboxyl groups is known as;
Amino acid
The order of acid strength is:
CClCOOH> CHCl2COOH> CH2ClCOOH> CH3COOH
Methyl cyanides, on boiling with mineral acids or alkalies yield:
Acetic acid
The formation of ester form acetic acid in presence of acid and ethanol is:
Nucleophilic substitution reaction
Complete reduction of carboxylic acids to alkanes is carried out with;
HI/P
Consider the following reaction: CH3COOH + Mg (metal) ➡? What product will form?
Magnesium acetate
Which of the following compounds, in the form of an aqueous solution, on reaction with sodium carbonate will produce carbon dioxide gas?
H3C2-CO-OH
CH3COOH + PCl5➡?.
The products of the above reaction are:
CH3COCl + POCl3 HCl
Carboxylic acids are rather hard to reduce, which powerful reducing agent can be used to convert them to the corresponding primary alcohol:
LiAlH4
CH3COOH + CH3CH2OH ➡CH3COOC2H5 + H2O; Which one of the following will act as a catalyst in the above reaction?
H2SO4
Which one of the following reactions of a carboxylic acid is reversible?
Esterification
Acetamide is formed by dehydration of:
Ammonium acetate
When ethanoyl chloride reacts with methylamine, an amide is formed. What is the structure of the amide formed?
H3C-CO-NHCH3
Ethyl butyrate and butyl butanoate are esters with the flavour are:
Pineapple
Which product is obtained by the reaction of a carboxylic acid with alcohol?
Ester
The nature of amino acid ‘lysine’ is;
Basic
Which of the following has an amino R-group?
Lysine
At an intermediate value of pH, amino acids form Zwitter ions containing:
-NH₃+ and COO-
In basic conditions, amino acid exists in one of the following forms:
H2N-CH2-COO-
The amno acids largely exist in dipolar ionic form:
Alpha amino acids
α-amino acids are compounds having carboxylic acid as well as amino functional groups attached to:
Same carbon atom
The formula of ‘Zwitter ion’ is represented as;
H3N+-CHR-CO2-
The amino acids which are not prepared in the human body are called:
Essential amino acids
Indicate the cyclic amino acid from the following:
Proline
At low pH or in acidic condition amino acid exists as:
Cation
Which one of the following reagents is used for the identification of amino acids?
Ninhydrin
Which one of the following amino acids is basic in nature?
Lysine
Which one of the following is also called the silver mirror test?
Tollen’s Reagent
In the formation of the Zwitter ion which one of the following donates the proton?
COOH
Which one of the following is the simplest amino acid?
Glycine
When acid is added to an amino acid, which one of the following will act as a base?
COO-
Which one of the following is not carboxylic acid?
CnH2n+1Oh
Pentanoic acid is:
Valeric acid
Which one is not fatty acid
Phthalic acid
Isobutyric acid is also written as:
2-Methylpropanoic acid
Which of the following compound cannot be oxidized to carboxylic acid by the mild oxidizing agent
Ethanol
Hybridization of functional carbon changes from ____ to ____ when converting to carboxylic from formyl
sp2 ➡ sp2
Ethyl cyanide boiled with HCl in the presence of water gives:
Propanoic acid
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
Propanal
Hydrolysis of alkane nitriles for preparing carboxylic acids requires:
➡Acidic Conditions
➡Alkaline Conditions
IUPAC name of CH3CN is:
Ethane Nitrile
R-X + KCN ➡R-CN + KX is an example of:
Nucleophilic substitution Reaction
Carboxylic acid decomposes bicarbonates with
Effervescence
Ethyl alcohol reacts with which to give a product having pineapple flavour:
Butyric acid
Which one is benzyl acetate:
CH3COOCH2C6H5
Esterification is a reaction:
Condensation
Which of the following do not give acetamide when react with ammonia:
Alkyl Nitrile
Which one doesn’t convert carboxylic acid to acid halide:
Cl2
During the formation of an ester from acetic acid, what actually happens:
Displacement of the OH- form the acid by OCH3
Carboxylic acid reacts with ammonia to form salt
Ammonium Acetate
Which of the following formula is more reactive for hydrolysis
-COCl
2CH3COOH + Na2CO3➡X + CO2.
Identify “X” among the following
Sodium Ethanoate
CH3COONH4➡CH3CONH2 + H2O
The above reaction is an example of :
Dehydration
Ester used for banana flavouring is:
Amyl acetate
Which of the following metal does not react with carboxylic acid
Cu
IUPAC name of:CH3-CO-NH2
Ethanamide
Pure organic acids are much:
Weaker than chloro substituted acids
Here the strongest acid is:
➡CH3COOH❌
➡Cl-CH2-COOH✅
➡CH3CH2COOH❌
➡Br-CH2-COOH❌
Carboxylic acid when dissolved in H2O produces H3O+ and :
Alkanoate ion
Which of the following can react with NaHCO3:
Ethanoic acid
Which of the following does not contain the COOH group:
Carbolic acid
Which of the following acid is found in the stings of bees and ants:
Formic acid
When a carboxylic acid is protonated, protonation occurs at:
Carbonyl oxygen atom
Which of the following cannot be directly prepared from acetic acid:
Acetamide
The reaction of acetic acid with sodium metal is:
Electrophilic substitution
In glutaric acid HOOC-(CH2)n-COOH, the value of n is equal to:
3
Which one is most acidic in nature:
Formic acid
The highest melting point is of:
C3H7COOH
The general formula of an aliphatic carboxylic acid is;
CnH2nO2
Only the first four members of aliphatic acids are soluble in water due to:
CnH2nO2
Only the first four members of aliphatic acids are soluble in water due to;
Hydrogen Bonding
The name of compound HOOC9CH2)4COOH is:
Adipic acid
Carboxylic acid are converted in respective alkanes in the presence of;
HI/P
Which of the following compound will convert acetic acid to acetyl chloride:
PCl5
Acetic acid undergoes reduction with LiAlH4 to give:
Ethanol
Ethanoic acid reacts with ethanol to give:
Ethyl acetate
What is obtained if n-propyl acetate is boiled with aqueous sodium hydroxide
C3H7OH
Which of the following is a cyclic carboxylic acid:
Phthalic acid
If amyl butyrate is added to a liquid, it will develop a flavour of :
Apricot
Which of the following is not carboxylic acid?
CnH2n+1Oh
If the methyl group of propane is replaced by a carboxylic resulting molecule is:
Malonic acid
Which of the following is an unsaturated aliphatic organic acid
Malic acid
Pentanoic acid is;
Valeric acid
Which one is a carboxylic acid
Palmitic acid
Which one is not fatty acid
Phthalic acid
Organic acid which cannot be obtained by hydrolysis of ats:
Succinic acid
Isobutyric acid is also written as:
2-Methylpropanoic acid
The compound that was first isolated by red ants;
Formic acid
By oxidation of which compound carboxylic acid cannot be obtained
2-Methyl, 2-Propanol
Which of the following compound cannot be oxidized to carboxylic acid by the mild oxidizing agent
Propanone
A compound oxidized to x, by further oxidation o x if the resulting compound is butyric acid, starting compound can be;
Butanol
Alkane nitriles on boiling with which type of acid gives organic acids:
Mineral
Hybridization of functional carbon changes from _____ to _____ when converting to carboxylic.
sp ➡sp2
Metallic cyanides give alkyl cyanides in the presence of:
Base
Gas released by acid hydrolysis of alkyl nitriles;
H2
Ethyl cyanide boiled with HCl in the presence of water gives:
Propanoic acid
Which member from simple, primary alkyl halides give butyric acid by acid hydrolysis
3rd
Oxidation of 2-Pentanone by strong oxidizing agents gives:
Propanoic acid, Ethanoic acid
Which member form simple, primary alkyl halides give butyric acid by acid hydrolysis:
3rd
Oxidation of 2-Pentaone by strong oxidizing agents gives:
➡Ethanoic acid
➡Propanoic acid
(Cleavage of the ketonic group from that side of carbonyl which contains a higher number of hydrogen atoms)
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
Propanol
Which metal does not release hydrogen gas from valeric acid
Pb
Potassium carbonate decomposed by acetic acid release gas, the nature of gas is;
Neutral
Which of the following cannot show the acidic nature of carboxylic acids
➡Alkali metals
➡Alkaline Earth metals
➡Alkali metal carbonates
Carboxylic acid decomposes bicarbonates with;
Effervescence
Which group of carboxylic acids is active for the reaction alkali carboantes:
H-atom
Which reaction can be used in artificial juices formation with carboxylic acids:
Esterification
The addition of ethyl alcohol in protonated acetic acid is:
Nucleophilic
Ethyl alcohol reacts with which to give a product having pineapple flavour:
Butyric acid
Which one is benzyl acetate:
C6H5CH2COOH3
Benzyl alcohol and acetic acid give a compound with ___ fragrance
Jasmine
Esterification is a reaction:
Condensation
Ammonium acetate converts to acetamide by
➡Dehyrdation
➡Heating
Which of the following represents acid amide:
CH3CONH2
Carboxylic acid derivative having least reactive is:
Acid Amide
Which sequence of groups replaces OH of a carboxylic acid with halides, esters and amides respectively?
➡X
➡OR
➡NH2
Which one doesn’t convert to acid halide:
Cl2
Which gas is released during acid halide formation with the help of thionyl chloride:
SO2
Which factor decreases the strength of carboxylic acid:
Branching
The strongest acid among the following is;
➡CH3CH2COOH❌
➡CH3CCl2COOH✅
➡CH3CHClCOOH❌
➡CH3CH(NH2)COOH❌
Acetic acid can be prepared by ethanol under:
Oxidizing conditions
Ethanoic acid manufactured through ethanol involves the use of:
Acidified potassium dichromate
If ethanoic acid is to be prepared by hydrolysis of alkane nitriles, which of the following can be the reagent to be hydrolyzed
CH3CN
Hydrolysis of alkane nitriles for preparing carboxylic acids requires:
Acidic Conditions
Hydrolysis of CH3CH2CN will synthesize:
Propanoic acid
The production of acid amide involves the reaction of ethanoic acid with:
Ammonia
Which of the following can be the reagent to produce acetyl chloride from ethanoic acid:
➡Thionyl Chloride
➡NaCl
During the formation of an acetyl chloride from ethanoic acid, what actually happens:
Attachment of Cl with the carbonyl carbon
During the formation of an ester from acetic acid, what actually happens:
Displacement of the OH from the acid by NH2
During the formation of an acid amide from ethanoic acid, what actually happens:
Displacement of the OH- from the acid by OCH3
The stronger acid among the following is:
➡Cl3CCOOH✅
➡Cl2CHCOOH❌
➡ClCH2COOH❌
➡CH3COOH❌
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 carboxylic acid
Organic acids are considered as;
Weak acids
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:
Stronger acid
Alkane nitriles can be prepared by treating alkyl halide with:
Potassium Cyanide
Ethanoic acid can be prepared by hydrolysis of:
Methane nitrile
Carboxylic acids react with active metals to form their sal;
H2 gas
Which pair can be used as a reactant for the preparation of acetyl chloride:
➡CH3COOH, SOCl2
➡CH3COOH, PCl5
For producing a carboxylic acid derivative. The addition of a nucleophile to the carboxyl group is always followed by displacement of:
H atom
Which statement is incorrect about the formation of ester
➡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✅
Carboxylic acid reacts with ammonia to form salt
Acetic anhydride
Which ester s used as orange flavour:
Benzyl acetate
Propanoic acid is produced from ___ on acid hydrolysis
Ethyl cyanide
Esters are
Neutral
Here the strongest acid is:
Cl-CH2-COOH
Which of the following formula is more reactive for hydrolysis:
-COCl
The work on concentrated H2SO4 in the esterification process is as:
Catalyst
The solubility of carboxylic acid in water gradually decreases with:
Increase in the molecular mass
Acetyl chloride is soluble in which solvent
➡Acetone
➡Ether
The acidic character of amino acids is due to:
Amino group
The amino acids that are synthesized within our body naturally are called:
Non-Essential amino acids
Which of the following will produce CO2 while reacting with sodium carbonate:
Carboyxlic acid
When a carboxylic acid is protonated, protonation occurs at:
Carbonyl oxygen atom
Which one is more acidic in nature:
Formic acid
Ethanoic acid reacts with ethanol in the presence o H2SO4 to give:
Ethyl ethanoate
Formation of ethanoyl chloride from ethanoic acid is an example of:
Nucelophilic substituton
The IUPAC name of phthalic acid is:
1,2-benzenedcarboxylic acid
-COOH is reduced to -CH3 in the presence of:
HI/P
Acetic acid exist as cyclic dimer in benzene due to ___ with ___ atoms in the ring.
➡Hydrogen Bonding
➡Eight
Weaker acid among the following is:
ICH2COOH
The reacton of carboxylic acid with sodium metal to form salt with evolution of H2 gas. t is an example of:
Electrophilic Substituton
Ethanoic acid reacts with all of these to produce water except:
Sodium
Carboxylic acid can be prepared by the action of Grignard’s Reagent with:
CO2
In the presence of hot alkaline potassium permanganate solution 2-butene will give:
Two moles of ethanoic acid
Velaric acid is obtained from a herb velarian, its IUPAC name is:
Pentanoic acid
The process of acid hydrolysis may be used to obtain:
Pentanoic acid
The process of acid hydrolysis may be used to obtain:
Amino acid from proteins
Ammonia on reaction with acetic acid followed by heating gives:
Acetamide
Ethane nitrile undergoes acid-hydrolysis to give:
Propanoic acd
X an Y combined to gve ompound Z. Orgnaic compounds X,Y and Z can be?
X➡ Alcohol
Y➡ Acid
Z➡ Ester
Aromatic carboxylic acid can be prepared by the oxidation of alkyl benzene, when treated with:
➡Alkaline KMnO4
➡Acidic K2Cr2O7
➡Dilute HNO3
In esterification reaction which bond for RCOOH breaks while reaction with alcohol:
C-H
The general formula of aliphatic carboxylic acid is:
CnH2nO2
Amyl butyrate will develop a flavor of:
Apricot
The reacton of carboxylic acid with alcohol in the presence of H2SO4 is the example of ____ reaction.
Nucleophilic Substitution
Number of oxygen atoms present in cyclic dimer of acetic acid.
4
Which of the following gives electrophilic substitution reaction with carboxylic acid
➡Na
➡NaOH
Which of teh following is the strongest acid?
Cl3CCOOh
Identify the correct order of acidic strength:
Carboxylic acid > Phenol> Water> Alcohol
Which oen is aliphatic dicarboxylci acid:
Oxalic acid
When ethanoic acid reacts with PCl5, the products formed are;
CH3COCl + POCl3 + HCl
Which of the following is not a fat acid
Benzoic Acid
The boiling points of carboxylic acids are ____ than their corresponding alkanes.
High due to hydrogen bonding
Carboxylic acids are dehydrated on heating strongly in the presence of phosphorus pentoxide product will be;
Acid Anhydride
Which of the folloiwng is the weakest acid?
➡CH3COOH✅
➡ClCH2COOH❌
➡Cl2CHCOOH❌
➡Cl3COOH❌
Which of the following acids cannot be prepared directly from carboxylic acid?
Acid Amide
All of the following methods are used to prepare acid anhydride?
Dehydration of carboxylic acid with P2O5
Which one of the following organic acids is the most reactive and the strongest acid?
➡HCOOH
Which of the followign halosubstituted carboxylic acids is the strgonest acid?
FCH2COOH
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
➡X: Alcohol
➡Y: Acetic Acid
➡Z: Ester
All of the following are optically active α-amino acids EXCEPT:
➡Glycine✅
➡Aspartic acid❌
➡Valine❌
➡Alanine❌
When an alkali is added to solution of α-amino acids, ___ releases the proton. Therefore, the acidic character is due to?
-NH3+
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:
Acidic (side chain e.g. HCl)
All of the following are uses of ethanoic acid EXCEPT:
➡ 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 ✅
Which of the followings has comaparatively less acidic character
Ethanol
Which reaction does not produce benzoic acid
➡By hydrolysis of C6H5CO2C2H5❌
➡By hydrolysis of C6H5CN❌
➡By oxidation of toluene❌
➡By oxidation of phenol ✅
Which class of organic compounds is used for artificial flavorings in jams?
Ester
Which of the followign compounds would react readily with NaOH?
RCOOH
Amino acids have all of the following porperties EXCEPT:
➡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❌
Which of the followign carboxylic acids is prepared by acid hydrolysis of ethane nitrile?
Ethanoic acid
Mark the incorrect statemnet about α-amino acids:
➡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 ✅
Which of the following methods is used to prepare amines (mixture of amines) on the commercial scale?
Hofmann’s Method
Dehydration of an acid amide gives:
Cyanide
Hoffmann’s bromamide reaction is used to prepare __- amine from amides.
1°
For which of the following type of amines carbylamine test gives positive reaction:
Primary Amine
The correct order of basic nature of the following:
CH3NH2, (CH3)2NH, (CH3)3N and NH3 is:
(CH3)2NH> CH3NH2> (CH3)3N> NH3
Reaction of ethanoc acdi with ammonia gives;
Ethane amide
Which of the following compounds is expected to be strongest base?
Ethylamine
Which of the following types of isomerism is not shown by aliphatic amines?
Tautomerism
Which of the following derivatives of carboxylic acid is the most reactive?
Acid Halide
In which of the following reactions acid chloride produces aldehyde?
Reaction with H2
Which of the following method is/are not used to prepare priamry amines?
By the reacton of Grignard reagent with NH3
On the acid hydrolysis of acid amide, which of the following product is obtained;
Carboxylic acid
Which of the following derivatives of carboxylic acid is least reactive?
Acid amide
The reacton of carboxylic acids with alcohols n presence of conc. H2SO4 is called;
Esterificaton
Which one of the following given the correct order of acid strength (strongest
first) for ethanoic acid, chloroethanoic acid and phenol?
CH2ClCO2H> CH3CO2H> C6H5OH
Acetic acid can be prodcued by the reaction of “A” with CH3CL followed by acid hydrolysis. The “A” is;
KCN
2-Butene heated with alkaline or acidic KMnO4 forms ____
Ethanoic acid
Carboxylic acid reacts with sodium hydroxide to fomr salt, belong to _____ reaction.
Electrophilic Substitution
Propanoic acid liberates CO2 from Na2CO3. The carbon of CO2 comes from:
Carbonate ion
Which of teh followin is not a fatty acid?
Oxalic acid
The reaction of carboxylic acid in which hydrogen atom of carboxyl group is involved
Reaction with Na metal
The pure acetic acid freezes to an ice like solid at:
298
Which of the following is strongest acid
Methanoic acid
Which of the following is the weakest acid:
Acetic acid
Select the carboxylic acid which has differnet smell from others;
Butyric acid
The correct order of decreasing acid strength of A=trichloroacetic acid, B =dichloroacetic acid, C = chloroacetic acid and D = acetic acid is
A> B> C> D
Ethane nitrile on boiling with mineral acids or alkalies yields corresponding
Ethanoic acid
How many grams of sodium metal are used with ethanoic acid to form one moel of H2 gas
46
Propanoic acid on reduction with HI and red phosphorus gives:
Propane
The alkyl group present in an ester having raspberry flavor is:
Isobutyl
The reducing agent for reduction of an ester is;
LiAlH4
The organic acid which ahs almost same boiling point as water as at standard pressure is
HCOOH
On complete reduction of CH3-COOH. The underlined group after reduction changes into;
-CH3
Acetic acid is miscible with all proportions in:
➡Water
➡Alcohol
➡Ether
The number of carbon atoms involved in a dimer molecule of acetic acid are;
4
Propanedioic acid is the IUPAC name of:
Malonic acid
Which of the following derivative of carboxylic acid is more reactive.
Acetyl Chloride
The dilute solution of ___ is called vinegar
Acetic acid
Ammonia on eraction with acetic acid followed by heating gives;
Acetamide
Propane nitrile undergoes acid-hydrolysis to give:
Propanoic acid
Carboxylic acid on reaction with LiAlH4 are reduced to;
Alcohol
Reaction of CH3COOH with PCl5 is an example of ___ reaction.
Nucleophilic substitution
___ cannot be prepared directly from acetic acid
Acetamide
C2H5OH + CH3COOH CH3COOC2H5 + H2O
Which of the following catalyst is used in the above reaction
Conc. H2SO4
Which of the followign compounds will react with NaOH, Na2CO3 and PCl5
CH3COOH
Compounds having -C≡N group are called;
Nitriles
Acetamide is prepared by:
Heating ammonium acetate
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?
CH3-CH2-COOH
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
➡C2H5OH
➡C3H7CO2H
C17H35COO-Na+ s sodium salt of fatty acid, its solubility is:
Higher than fatty acid
C6H5COOH is the chemical formula of:
Benzoic acid
Which of the following has maximum number of carbon atoms:
➡Succinic acid❌
➡Adipic acid✅
➡Oxalic acid❌
➡Malonic acid❌
The number of atoms present in the ring of dimer of acetic acid in benzene solvent are;
8
Which one is aliphatic dicarboxylic acid:
Oxalic acid
The solution of which acid is used for seasoning of food:
Acetic acid
Which of the following will give positive bromine water test:
Maleic acid
(Maleic acid have double bond)
Ammonium acetate on strong heating gives:
Acetatamide
Banana flavor is given by:
Amylacetate
The dehydration of the carboxylic acids in the presence of P2O5 and strong heating yields:
Anhydride
Which of the following is fatty acid:
➡Formic acid
➡Palmitic acid
➡Stearic acid
Which of the following is most acidic in nature:
Nitroacetic acid
The highest melting point is of:
C3H7COOH
Which of the following will give acetic acid on acid hydrolysis:
CH3CN
Which of the following is a cyclic carboxylic acid:
Phthalic acid
Carboxylic acids are soluble in benzene forming cyclic dimers. The number of carbon atoms in the dimmeric ring are:
2
Which of the followign is a polyproticacid:
Oxalic acid
Which of the followings is the acetic acid?
CH3COOH
Which of the followings is the malonic acid and also polyprotic acid?
CH2(COOH)2
C15H31COOH is the chemical formula of:
Palmitic acid
C6H4(COOH)2 is the chemical formula of:
Phthalic acid
CH3CH2CHCOOH is the chemical formula of:
➡Butanoic acid
➡Butyric acid
➡Propyl carboxylic acid
A carboxylic acid contains:
Carboxyl Group
Formic acid was first isolated from:
Red ant
Butyric acid was first isolated from:
Butter
Grignard’s Reagent gives carboxylic acid with:
CO2
The solubility of carboxylic acids with the increase in the no. of carbons and hydrogens.
Decreases
Even carboxylic acids have ___ melting point than the next lower and higher members having odd carbon atoms:
Higher
Which of the following is the weaker acid?
➡HCl❌
➡H2SO4❌
➡CH3COOH✅
2-Butene when heated with alkaline KMnO4 gives:
Carboxylic acid
Glacial acetic acid freezes to ice like solid at:
17°C
Phthalic acid is also called;
1,2-benzenedicarboxylic acid
The carboxylic acids which are liquid with pungent smell have number of carbons
C1-C3
The general ormula of aliphatic carboxylic acid is:
CnH2nO2
Only first four members of aliphatic acids are soluble in water due to:
Hydrogen Bonding
C17H35COO-Na+ is sodium salt of a ____.
Stearic acid
Hydrolysis of alkane nitriles with mineral acids or alkali yields:
Carboxylic acid
Which of following is cannot be directly prepared from acetic acid:
➡Acetamide✅
➡Acetic anhydride❌
➡Ethyl acetate❌
➡Acetyl chloride❌
Acetic acid undergoes reduction with LiAlH4 to give:
Ethanol
What is obtained if n-propyl acetate is boiled with aqueous sodium hydroxide:
C3H7OH
If benzyl acetate is added to a liquid, it will develop a flavour of:
Jasmine
Raspberry flavor is given by:
Isobutylformate
Pineapple flavor is given by:
Ethylbutyrate
Orange flavor is given by:
Octylacetate
Carboxylic acids yields ___ on reaction with alcohols in the presence of conc. H2SO4
Ester
An aqueous solution of an organic compound reacts with Na2CO3 to produce O2 gas. The organic compound is:
CH3-CH2-COOH
Acetamide is prepared by:
Heating CH3COOH4
Organic compounds having fruity smell are;
Esters
The derivative of carboxylic acid is:
➡Acid chloride (CH3COl)
➡Acid amide (CH3CONH2)
➡Ester
2-Hydroxylpropanoic acid is called _____ and 2,3-Dihydroxybutanedioic acid is called___.
➡Lactic acid
➡Tartaric acid
Acetic acid can be manufactured by ___ of carbohydrates.
Fermentation
