Alcohol, Phenols and Ether Previous Year Questions with Answer

1. The general molecular formula, which represents the homologous series of alkanols is                                                                                                                       NEET 2006

(a) C_nH_2n+2O

(b) C_nH_2nO₂

(c) C_nH_2nO

(d) C_nH_{2n + 1}O

2. Reaction between acetone and methyl magnesium chloride followed by hydrolysis will give                                                                                                                   NEET 2020

(a) iso-propyl alcohol

(b) sec-butyl alcohol

(c) tart-butyl alcohol

(d) iso-butyl alcohol

3.

                                                          NEET 2019

(a)             (b)

(c)                 (d)

4. When vapours of a secondary alcohol is passed over heated copper at 573 K, the product formed is                                                                                                            NEET 2020

(a) A carboxylic acid                           (b) An aldehyde

(c) A ketone                                         (d) An alkene

5.

                                             NEET 2018

(a)               (b)

(c)                   (d)

6. Compound A, C₈H₁₀O, is found to react with NaOI (produced by reacting Y with NaOH) and yields a yellow precipitate with characteristic smell. A and Y Are respectively        NEET 2018

(a)

(b)

(c)

(d)

7. Identify the major products P, Q and R in the following sequence of reactions:

             NEET 2018

 

8. Which one is the most acidic compound?                                                               NEET 2017

9. Reaction of phenol with chloroform in presence of dilute sodium hydroxide finally introduces which one of the following functional group?                                                                    2015

(A) –COOH

(b) –CHCl₂

(c) –CHO

(d) –CH₂Cl

10.

(a) (I) and (II) only                                                  (b) (IV) only

(c) (III) and (IV) only

(d) (I), (III) and (IV) only                                                                     (2015)

11. Which of the following will not be soluble in sodium hydrogen carbonate?          2014

(a) 2, 4, 6-Trinitrophenol

(b) Benzoic acid

(c) o-Nitro phenol

(d) Benzenesulphonic acid

12. Number of isomeric alcohols of molecular formula C₆H₁₄O which give positive iodoformism test is                                                                                                                      NEET 2013

(a) Three                                              (b) Four

(c) five                                                 (d) two.

13.

                                                                       2012

(a) Acetone                      (b) Methane

(c) Acetaldehyde             (d) Ethyl alcohol.

14.

                                                         2011

15. Given are cyclohexane (I), acetic acid (II), 2, 4, 6- trinitrophenol (III) and phenol (IV). In these the order of decreasing acidic character will be                                                                    (2010)

(a) III > II > IV > I

(b) II > III > I > IV

(c) II > III > IV > I

(d) III > IV > II > I

16. Which of the following compounds has the most acidic nature?  (2010)

(a)                                 (b)

(c)                                           (d)

17. among the following four compounds                                   (2010)

(i) Phenol                         (ii) Methyl phenol

(iii)Meta-nitro phenol      (iv) Para-nitro phenol                The acidity order is

(a) (iv) > (iii) > (i) > (ii)       (b) (iii) > (iv) > (i) > (ii)

(c) (i) > (iv) > (iii) > (ii)       (d) (ii) > (i) > (iii) > (iv)