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Chemistry Class 12 > Alcohols, Phenols, Ethers > Flashcards

Alcohols, Phenols, Ethers Flashcards

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1
Q

Propane-1,2,3 triol is called

A

Glycerol

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2
Q

Alcohols from hydroboration

A

Ch3-Ch=Ch2 + BH3 –> (Ch3-Ch2-Ch2)3B + H2O –> 2Ch3-Ch2-Ch2OH + B(OH)3

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3
Q

Which reagent gives 1° alcohol

A

LiAlH4

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4
Q

E’ withdrawing group ____ acid strength on phenol

A

Increase

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5
Q

Acid strength increases when K(A)

A

Increases

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6
Q

When pK(a) = -logK(a) is more, acid strength

A

Decreases

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7
Q

Cresol has

A

Ch3 on phenol

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8
Q

Ethane 1,2-diol

A

Ethylene glycol

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9
Q

Ethene to ethanol

A

H2O(H+)

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10
Q

Methanal gives

A

1° alc

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11
Q

Ketones with gridnard give

A

3° alc

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12
Q

All other aldehydes give

A

2° alc

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13
Q

Ch3MgBr to 2-methyl propan-2-ol

A

Propanone or acetone

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14
Q

Propene + H20

A

Propan2ol

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15
Q

Propene + h2O2

A

Propanol

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16
Q

Reducing agents that form 1° alc eg:

A

LiAlH4, NaBH4 and Na in C2H5OH

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17
Q

Which reagent only will reduce COOH to alc?

A

LiAlH4

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18
Q

Prep of phenols

A

Chlorobenzene
Benzene sulphonic acid
Diazonium chloride
Cumene

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19
Q

Chlorobenzene to phenol

A

Aq. NaOH + HCl

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20
Q

Benzene sulphonic acid to phenol

A

Benzene + H2SO4 + NaOH + 2NaOH(-Na2SO3) + HCl

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21
Q

Diazonium chloride to phenol

A

H20(heat)

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22
Q

Cumene to phenol

A

O2 + H2O(H+)

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23
Q

ROH + NaOH

A

No rn

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24
Q

2ROH + 2Na

A

2RONa + H2

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25
Q

Why is phenol more acidic than alcohols?

A

Due to acidic nature: phenoxide ion formed by release of proton is stable due to resonance. But in alc, alkoxide ion isn’t stable

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26
Q

Pyridine is a ___ and it ___ the product

A

Base; removes

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27
Q

C6H5COOCH3 is called

A

Methyl benzoate

28
Q

Aspirin is obtained by

A

Esterification

29
Q

2hydroxybenzoic acid + acid anhydride

A

Asirin(2 acetoxybenzoic acid) + CH3COOH

30
Q

RCh2OH to RCh2Cl

A

HCl(ZnCl2)

31
Q

Luca’s reagent

A

Conc hcl + zncl2

32
Q

Ethanol to ethene

A

Dehydration by conc H2SO4(443K)

33
Q

2° alc to propene

A

85% h3po4(440K)

34
Q

3° alc to 2methylpropene

A

20% h3po4(358K)

35
Q

Ethanol to acetaldehyde

A

CrO3

36
Q

Can ketones oxidize to give carboxylic acid?

A

No, cuz there’s no H present on ketones

37
Q

3° alc shows no reaction to oxidation as

A

There’s no H present for removal

38
Q

3°alc + Cu/300°C gives

A

Alkene due to dehydration

39
Q

Salicylic acid to aspirin

A

acid anhydride/ pyridine

40
Q

3° alc + H+ gives

A

alkene due to dehydration

41
Q

Ethanol to ethene

A

H+

42
Q

Chlorobenzene to phenol

A

NaOH(high temp, press) + HCl

43
Q

Benzene sulphonic acid to benzene

A

NaOH/H+

44
Q

Benzene to phenol-

A

conc H2SO4 to Benzene sulphonic acid + NaOH/H+

45
Q

Aniline to phenol

A

NaNO2/HCl is diazonium + H2O(warm)

46
Q

Cumene to phenol

A

O2 to cumene peroxide + H2O

47
Q

Solubility decreases as

A

alkyl group size increases

48
Q

Acidity order(desc)

A

POM-phenol

49
Q

Acidity order for alcohols

A

1°>2°>3° alc

50
Q

Phenol to 2,4,6-tribromophenol

A

Bromine water(3Br2)

51
Q

Phenol to o-bromo & p-bromo phenol

A

Br2 in CS2(273K)

52
Q

Phenol to o-nitro & p-nitro phenol

A

Dil.HNO3(288K)

53
Q

Main product in nitration of phenol?why?

A

O-nitrophenol due to intramolecular H bond

54
Q

Phenol + conc.HNO3

A

2,4,6-trinitrophenol

55
Q

Fridelcrafts’ acylation for phenol

A

Phenol + Ch3cocl(alcl3 excess) gives Coch3 at p- position of phenol

56
Q

Kolbe’s reaction

A

Phenol + NaOH + CO2 + dil HCl gives salcylic acid

57
Q

Reimer tiemann

A

Phenol + NaOH + chcl3(358K) + 2NaOH + dil HCl gives salicylaldehyde)

58
Q

Phenol to benzene

A

Zn

59
Q

ethanol to diethylether

A

H2SO4(413K)

60
Q

°1 alc gives

A

Ethers

61
Q

2° and 3° alc will give

A

Ether as minor product and alkene as major product.
Alkene due to dehydration

62
Q

Williamson’s synthesis

A

R-ONa + RX gives ROR + NaX

63
Q

Alc have > BP than ether due to

A

Intermolecular H bond

64
Q

To form ether, the halogen should be attached to

A

Smaller alkyl group

65
Q

Ethoxybenzene from Williamson’s

A

C6H5ONa + C2H5Br

66
Q

Propoxypropene from william’s

A

Ch3ch2ch2ONa + ch3ch2ch2br

67
Q

Which alcohol will react with Luca’s reagent fastest to give turbidity?

A

3°>2>1

Chemistry Class 12 (10 decks)

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