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

Concept: Different organic reactions follow characteristic mechanisms.
Step 1: Friedel–Craft reaction Friedel–Craft alkylation/acylation occurs through an electrophile attacking an aromatic ring. \[ \text{Electrophilic substitution} \] \[ (i) \rightarrow (P) \]
Step 2: Williamson’s ether synthesis Formation of ethers occurs through \(S_N2\) reaction between alkoxide ion and alkyl halide. \[ \text{Nucleophilic substitution} \] \[ (ii) \rightarrow (Q) \]
Step 3: Chlorination of alkanes in sunlight This proceeds via free radical chain mechanism. \[ (iii) \rightarrow (R) \]
Step 4: Reaction with \(Br_2/CHCl_3\) Addition of bromine across a double bond proceeds through electrophilic addition. \[ (iv) \rightarrow (S) \]
Step 5: Final matching \[ i \rightarrow P,\quad ii \rightarrow Q,\quad iii \rightarrow R,\quad iv \rightarrow S \]