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Aldehydes, Ketones and Carboxylic Acids · Question 57

AIPMT 2010 (Prelims)MCQMedium📈 Topic in 0% papers+4−1
1

In a set of reactions, ethylbenzene yielded a product D. [figure] D would be

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

Answer

(4) [figure]

Solution

KMnO4/KOH oxidises the whole side chain of an alkylbenzene to –COOH (as benzoate; benzoic acid after acidification).

B = benzoic acid, C6H5COOH

–COOH is a deactivating, meta-directing group, Br2/FeCl3 brominates the meta position.

C = m-bromobenzoic acid

C2H5OH/H+ esterifies the –COOH group.

D = ethyl m-bromobenzoate (option 4)

Answer: (4)

AIPMT 2010 (Prelims)

Keep practising — Aldehydes, Ketones and Carboxylic Acids

2

Which of the following reactions will not result in the formation of carbon-carbon bonds?

  1. Reimer-Tiemann reaction
  2. Cannizzaro reaction
  3. Wurtz reaction
  4. Friedel-Crafts acylation
AIPMT 2010 (Prelims)
3

Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

  1. CH3COOCH3
  2. CH3CONH2
  3. CH3COOCOCH3
  4. CH3COCl
AIPMT 2010 (Prelims)
4

Propionic acid with Br2/P yields a dibromo product. Its structure would be

  1. [figure]
  2. CH2(Br)-CH2-COBr
  3. [figure]
  4. CH2(Br)-CH(Br)-COOH
AIPMT 2009
5

A strong base can abstract an α-hydrogen from

  1. ketone
  2. alkane
  3. alkene
  4. amine
AIPMT 2008
6

The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of

  1. Acid anhydride > Amide > Ester > Acyl chloride
  2. Acyl chloride > Ester > Acid anhydride > Amide
  3. Acyl chloride > Acid anhydride > Ester > Amide
  4. Ester > Acyl chloride > Amide > Acid anhydride.
AIPMT 2008
7

Acetophenone when reacted with a base, C2H5ONa, yields a stable compound which has the structure

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2008
8

Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called

  1. Cope reduction
  2. Dow reduction
  3. Wolff-Kishner reduction
  4. Clemmensen reduction
AIPMT 2007
9

The product formed in Aldol condensation is

  1. a beta-hydroxy aldehyde or a beta-hydroxy ketone
  2. an alpha-hydroxy aldehyde or ketone
  3. an alpha, beta unsaturated ester
  4. a beta-hydroxy acid.
AIPMT 2007
10

Which one of the following on treatment with 50% aqueous sodium hydroxide yields the corresponding alcohol and acid?

  1. C6H5CHO
  2. CH3CH2CH2CHO
  3. CH3- O \|C-CH3
  4. C6H5CH2CHO
AIPMT 2007
11

Which of the following represents the correct order of the acidity in the given compounds ?

  1. FCH2COOH > CH3COOH > BrCH2COOH > ClCH2COOH
  2. BrCH2COOH > ClCH2COOH > FCH2COOH > CH3COOH
  3. FCH2COOH > ClCH2COOH > BrCH2COOH > CH3COOH
  4. CH3COOH > BrCH2COOH > ClCH2COOH > FCH2COOH
AIPMT 2007

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