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Aldehydes, Ketones and Carboxylic Acids · Question 55

AIPMT 2010 (Mains)MCQEasy📈 Topic in 12% papers+4−1
1

Following compounds are given (i) CH3CH2OH (ii) CH3COCH3 (iii) CH3- CH3 |CHOH (iv) CH3OH Which of the above compound(s), on being warmed with iodine solution and NaOH, will give iodoform?

  1. (i), (iii) and (iv)
  2. Only (ii)
  3. (i), (ii) and (iii)
  4. (i) and (ii)

Answer

(3) (i), (ii) and (iii)

Solution

As per NCERT, compounds having CH3CO- group, or CH3CH(OH)- group (oxidised to CH3CO- by NaOI), give iodoform.

(i) CH3CH2OH has CH3CH(OH)- (with H) ⇒ oxidised to CH3CHO ⇒ gives CHI3

(ii) CH3COCH3 is a methyl ketone ⇒ gives CHI3

(iii) (CH3)2CHOH is oxidised to CH3COCH3 ⇒ gives CHI3

(iv) CH3OH has no CH3-C unit ⇒ no iodoform

∴ (i), (ii) and (iii)

Answer: (3)

AIPMT 2010 (Mains)

Keep practising — Aldehydes, Ketones and Carboxylic Acids

2

Which one of the following compounds will be most readily dehydrated?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2010 (Mains)
3

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2010 (Prelims)
4

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)
5

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)
6

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
7

A strong base can abstract an α-hydrogen from

  1. ketone
  2. alkane
  3. alkene
  4. amine
AIPMT 2008
8

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
9

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
10

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
11

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

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