Ncert Exercises & Solutions

Match the polymers given in Column I with their repeating units given in Column II.

Column I

Column II

A. Acrilan
B. polystyrene
C. Novolac
D. Buna-N

1. $[{CH}_{2} - CH] n$
$|$
$C_{6} H_{5}$
2. $Cl$
$|$
$[{CH}_{2} - CH = CH - {CH}_{2} - {CH}_{2} - CH] n$

3. $[{CH}_{2} - CH]$
$|$
$CN n$
5.

Codes

A B C D

1. 2 3 4 1

2. 3 1 4 2

3. 1 4 3 2

4. 4 3 2 1

Column I represents the name of the polymer and Column ll represents their molecular formula. The correct matching can be done as

Column I	Column II
A. Acrilan B. polystyrene C. Novolac D. Buna-N	1 $[{CH}_{2} - CH]$ $\|$ $CN n$ 2. $[{CH}_{2} - CH] n$ $\|$ $C_{6} H_{5}$ 3. 4. $[{CH}_{2} - CH = CH - {CH}_{2} - \underset{\underset{Cl}{I}}{C} H - CH] n$