Question

Column-I	Column-II
(i) Friedel craft reaction	(P) Electrophilic substitution
(ii) Williamson’s ether synthesis	(Q) Nucleophilic substitution
(iii) Chlorination of alkane in presence of sunlight	(R) Free radical substitution
(iv) \(Br_2/\text{CHCl}_3\)	(S) Electrophilic addition

• A. i$\rightarrow$R, ii$\rightarrow$S, iii$\rightarrow$Q, iv$\rightarrow$P
• B. i$\rightarrow$Q, ii$\rightarrow$P, iii$\rightarrow$R, iv$\rightarrow$S
• C. i$\rightarrow$P, ii$\rightarrow$Q, iii$\rightarrow$S, iv$\rightarrow$R
• D. i$\rightarrow$P, ii$\rightarrow$Q, iii$\rightarrow$R, iv$\rightarrow$S

Answer 1

The Correct Option is D

Let's match the reactions from Column-I with their corresponding reaction types in Column-II. 

Column-I	Column-II
(i) Friedel craft reaction	(P) Electrophilic substitution
(ii) Williamson’s ether synthesis	(Q) Nucleophilic substitution
(iii) Chlorination of alkane in presence of sunlight	(R) Free radical substitution
(iv) \(Br_2/CHCl_3\)	(S) Electrophilic addition

Let's analyze each reaction:

1. Friedel-Craft Reaction: This is a type of aromatic electrophilic substitution reaction where an electrophile replaces a hydrogen atom in an aromatic ring. Thus, it matches with (P) Electrophilic substitution.
2. Williamson’s Ether Synthesis: This involves the reaction between an alkoxide ion and an alkyl halide, typically proceeding via a nucleophilic substitution mechanism, typically SN2. This matches with (Q) Nucleophilic substitution.
3. Chlorination of Alkane in Presence of Sunlight: This reaction proceeds through a free radical chain mechanism. The presence of sunlight is typical for initiating free radical reactions. Hence, it is a (R) Free radical substitution.
4. \(Br_2/CHCl_3\): In this context, bromine in a solvent like chloroform often adds to alkenes or alkynes. This is characterized as electrophilic addition; hence it corresponds to (S) Electrophilic addition.

Therefore, the correct matching of Column-I with Column-II is:

1. (i) Friedel craft reaction → (P) Electrophilic substitution
2. (ii) Williamson’s ether synthesis → (Q) Nucleophilic substitution
3. (iii) Chlorination of alkane in presence of sunlight → (R) Free radical substitution
4. (iv) \(Br_2/CHCl_3\) → (S) Electrophilic addition

The correct answer is: i → P, ii → Q, iii → R, iv → S