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Aldehydes, Ketones and Carboxylic Acids · Question 71

AIPMT 2005MCQMedium📈 Topic in 38% papers+4−1
1

In a set of reactions acetic acid yielded a product D. CH3COOH SOCl2 A [anhy. AlCl3]benzene B HCN C HOH D The structure of D would be

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]

Answer

(4) [figure]

Solution

CH3COOH SOCl2 CH3COCl (A, acetyl chloride)

CH3COCl + C6H6 anhy. AlCl3 C6H5COCH3 (B, acetophenone; Friedel–Crafts acylation)

C6H5COCH3 HCN C6H5C(OH)(CN)CH3 (C, cyanohydrin; nucleophilic addition)

C6H5C(OH)(CN)CH3 HOH C6H5C(OH)(CH3)COOH (D)

Hydrolysis converts -CN into -COOH; the phenyl, -OH and -CH3 groups stay on the same carbon.

D is 2-hydroxy-2-phenylpropanoic acid.

Answer: (4)

AIPMT 2005

Keep practising — Aldehydes, Ketones and Carboxylic Acids

2

When m-chlorobenzaldehyde is treated with 50% KOH solution, the product(s) obtained is (are)

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2003
3

A and B in the following reactions are : [figure]

  1. [figure]
  2. [figure]
  3. A = RR'CHCN, B = NaOH
  4. [figure]
AIPMT 2003
4

[figure] In the above reaction product P is

  1. [figure]
  2. [figure]
  3. [figure]
  4. C6H5- O \|C-C6H5
AIPMT 2002
5

In the following reaction product P is R- O \|C-Cl [Pd-BaSO4]H2 P

  1. RCH2OH
  2. RCOOH
  3. RCHO
  4. RCH3
AIPMT 2002
6

[figure] Product 'P' in the above reaction is

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2002
7

First product of the reaction between RCHO and NH2NH2 is

  1. RCH=NNH2
  2. RCH=NH
  3. RCH2NH2
  4. RCON3
AIPMT 2000
8

Benzoic acid may be converted into ethyl benzoate by reaction with :

  1. ethyl alcohol
  2. ethyl alcohol and dry HCl
  3. ethyl chloride
  4. sodium ethoxide.
AIPMT 2000
9

Reduction by LiAlH4 of hydrolysed product of an ester gives

  1. two alcohols
  2. two aldehydes
  3. one acid and one alcohol
  4. two acids.
AIPMT 2000

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