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Aldehydes, Ketones and Carboxylic Acids · Question 74

AIPMT 2002MCQEasy📈 Topic in 50% papers+4−1
1

[figure] In the above reaction product P is

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

Answer

(2) [figure]

Solution

As per NCERT, Grignard reagents react with carbon dioxide (dry ice) to form salts of carboxylic acids, which on acidification give the carboxylic acid.

C6H5MgBr + CO2 C6H5COOMgBr

C6H5COOMgBr H3O+ C6H5COOH + Mg(OH)Br

∴ P is benzoic acid.

Answer: (2)

AIPMT 2002

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2

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
3

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

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

First product of the reaction between RCHO and NH2NH2 is

  1. RCH=NNH2
  2. RCH=NH
  3. RCH2NH2
  4. RCON3
AIPMT 2000
5

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
6

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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