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Alcohols, Phenols and Ethers · Question 30

AIPMT 2014MCQMedium📈 Topic in 25% papers+4−1
1

Which of the following will not be soluble in sodium hydrogen carbonate?

  1. 2,4,6-Trinitrophenol
  2. Benzoic acid
  3. o-Nitrophenol
  4. Benzenesulphonic acid

Answer

(3) o-Nitrophenol

Solution

A compound dissolves in NaHCO3 only if it is a stronger acid than carbonic acid (pKa 6.4), liberating CO2.

Benzenesulphonic acid and benzoic acid (pKa 4.2) are strong enough ⇒ soluble.

2,4,6-Trinitrophenol (picric acid, pKa 0.71) has three –I, –R nitro groups ⇒ strongly acidic ⇒ soluble.

o-Nitrophenol (pKa 7.2) is a weaker acid than carbonic acid ⇒ does not dissolve in NaHCO3.

Answer: (3)

AIPMT 2014

Keep practising — Alcohols, Phenols and Ethers

2

Among the following ethers, which one will produce methyl alcohol on treatment with hot concentrated HI?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
NEET 2013
3

Which of the following compounds can be used as antifreeze in automobile radiators?

  1. Methyl alcohol
  2. Glycol
  3. Nitrophenol
  4. Ethyl alcohol
AIPMT 2012 (Mains)
4

In the following reaction [figure] The major product is

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2012 (Prelims)
5

Match the compounds given in List-I with List-II and select the suitable option using the code given below.

  1. (A)-(iv), (B)-(i), (C)-(iii), (D)-(ii)
  2. (A)-(iv), (B)-(ii), (C)-(iii), (D)-(i)
  3. (A)-(ii), (B)-(iii), (C)-(iv), (D)-(i)
  4. (A)-(ii), (B)-(i), (C)-(iv), (D)-(iii)
AIPMT 2011 (Mains)
6

In the following reactions, (i) CH3- CH3 |CH- OH |CH-CH3 H+/heat (Major product)A + (Minor product)B (ii) A [in absence of peroxide]HBr, dark (Major product)C + (Minor product)D the major products (A) and (C) are respectively

  1. CH2= CH3 |C-CH2-CH3 and Br |CH2- CH3 |CH-CH2-CH3
  2. CH3- CH3 |C=CH-CH3 and CH3- Br | CH3 |C-CH2-CH3
  3. CH2= CH3 |C-CH2-CH3 and CH3- Br | CH3 |C-CH2-CH3
  4. CH3- CH3 |C=CH-CH3 and CH3- CH3 |CH- Br |CH-CH3
AIPMT 2011 (Prelims)
7

When glycerol is treated with excess of HI, it produces

  1. 2-iodopropane
  2. allyl iodide
  3. propene
  4. glycerol triiodide
AIPMT 2010 (Mains)
8

Given are cyclohexanol (I), acetic acid (II), 2, 4, 6-trinitrophenol (III) and phenol (IV). In these the order of decreasing acidic character will be

  1. III > II > IV > I
  2. II > III > I > IV
  3. II > III > IV > I
  4. III > IV > II > I
AIPMT 2010 (Prelims)
9

Among the following four compounds (i) Phenol (ii) Methyl phenol (iii) Meta-nitrophenol (iv) Para-nitrophenol The acidity order is

  1. (iv) > (iii) > (i) > (ii)
  2. (iii) > (iv) > (i) > (ii)
  3. (i) > (iv) > (iii) > (ii)
  4. (ii) > (i) > (iii) > (iv)
AIPMT 2010 (Prelims)
10

Which of the following compounds has the most acidic nature?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
AIPMT 2010 (Prelims)
11

Consider the following reaction : Phenol Zn dust X [Anhyd. AlCl3]CH3Cl Y Alkaline KMnO4 Z the product Z is

  1. benzaldehyde
  2. benzoic acid
  3. benzene
  4. toluene
AIPMT 2009

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