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Alcohols, Phenols and Ethers · Question 49

AIPMT 2004MCQEasy📈 Topic in 0% papers+4−1
1

Which one of the following can be oxidised to the corresponding carbonyl compound?

  1. 2-Hydroxypropane
  2. ortho-Nitrophenol
  3. Phenol
  4. 2-Methyl-2-hydroxypropane

Answer

(1) 2-Hydroxypropane

Solution

2-Hydroxypropane, CH3CH(OH)CH3, is a secondary alcohol; as per NCERT, 2° alcohols are oxidised to ketones:

CH3CH(OH)CH3 [O] CH3COCH3 (propanone)

2-Methyl-2-hydroxypropane, (CH3)3COH, is a 3° alcohol — no H on the carbinol carbon, so it is not oxidised to a carbonyl compound under ordinary conditions.

Phenol and o-nitrophenol have –OH on an aromatic ring and do not give a corresponding carbonyl compound.

Answer: (1)

AIPMT 2004

Keep practising — Alcohols, Phenols and Ethers

2

In a set of the given reactions, acetic acid yielded a product C. CH3COOH + PCl5 A [Anh. AlCl3]C6H6 B [ether]C2H5MgBr C Product C would be

  1. CH3CH(OH)C2H5
  2. CH3COC6H5
  3. CH3CH(OH)C6H5
  4. CH3- C2H5 |C(OH)C6H5
AIPMT 2003
3

n-Propyl alcohol and isopropyl alcohol can be chemically distinguished by which reagent?

  1. PCl5
  2. reduction
  3. oxidation with potassium dichromate
  4. ozonolysis
AIPMT 2002
4

When phenol is treated with CHCl3 and NaOH, the product formed is

  1. benzaldehyde
  2. salicylaldehyde
  3. salicylic acid
  4. benzoic acid
AIPMT 2002
5

In preparation of alkene from alcohol using Al2O3 which is the effective factor ?

  1. Porosity of Al2O3
  2. Temperature
  3. Concentration
  4. Surface area of Al2O3
AIPMT 2001
6

Which of the following is correct?

  1. On reduction, any aldehyde gives secondary alcohol.
  2. Reaction of vegetable oil with H2SO4 gives glycerine
  3. Alcoholic iodine with NaOH gives iodoform.
  4. Sucrose on reaction with NaCl gives invert sugar.
AIPMT 2001
7

Which reagent converts propene to 1-propanol ?

  1. H2O, H2SO4
  2. B2H6, H2O2, OH-
  3. Hg(OAc)2, NaBH4/H2O
  4. Aq. KOH
AIPMT 2000

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