Question

$\begin{array}{cc}\text{Column - I}& \text{Column - II}\\ \text{(i)}{S}_{N}1\text{reaction}& \text{(A)}vic\text{-dihalide}\\ \text{(ii) Alkylidene halides}& \text{(B)}gem\text{-dihalide}\\ \text{(iii) Bromination}& \text{(C) Racemisation}\\ \text{(iv) Elimination of}HX& \text{(D) Saytzeff rule}\end{array}$
Which of the following is the best matched option?

• A. i-C, ii- D, iii- A, iv-B
• B. i-C, ii- B, iii- A, iv-D
• C. i-D, ii- B, iii- A, iv-C
• D. i-D, ii- A, iii- B, iv-C

Answer 1

The correct option is B i-C, ii- B, iii- A, iv-D

(i) Racemisation takes place in $S_{N}1$ reaction.
(ii) Alkylidene halides are named as gemdihalides. In gemdihalides halogen atoms are present on same carbon atom.
(iii) In vicinal dihalides, halogen atoms are present on the adjacent carbon atom. Bromination of alkenes will give vicinal dihalides.
(iv) Elimination of $HX$ from allrylhalide follows Saytzeff rule.