Atomos Test Generator Free PYQs ExamsMy practice Log in / Sign up free

Aldehydes, Ketones and Carboxylic Acids

AIPMT 2003MCQMedium📈 Topic in 38% papers+4−1
Ques. 1AIPMT 2003

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

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

Answer

(4) [figure]

Solution

Step 1: HCN/KCN adds to the carbonyl group (nucleophilic addition of CN-) to give the cyanohydrin:

R-CO-R' [KCN]HCN RR'C(OH)CN (A)

Step 2: The product RR'C(OH)CH2NH2 has -CH2NH2 in place of -C N the nitrile group is reduced.

As per NCERT, nitriles are reduced to primary amines by LiAlH4: -C N LiAlH4 -CH2NH2 B = LiAlH4

Answer: (4)

Keep practising — Aldehydes, Ketones and Carboxylic Acids

Ques. 2AIPMT 2002

[figure] In the above reaction product P is

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

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

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

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 5AIPMT 2000

First product of the reaction between RCHO and NH2NH2 is

  1. RCH=NNH2
  2. RCH=NH
  3. RCH2NH2
  4. RCON3
Ques. 6AIPMT 2000

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.
Ques. 7AIPMT 2000

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.

All Aldehydes, Ketones and Carboxylic Acids PYQs →

PDFDownload Aldehydes, Ketones and Carboxylic Acids PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Chemistry chapters