The correct match between Item-I and Item-II is:
| Item-I | Item-II | ||
|---|---|---|---|
| (a) | High density polythene | (I) | Peroxide catalyst |
| (b) | Polyacrylonitrile | (II) | Condensation at high temperature & pressure |
| (c) | Novolac | (III) | Ziegler-Natta Catalyst |
| (d) | Nylon 6 | (IV) | Acid or base catalyst |
- (A)(a) → (III), (b) → (I), (c) → (II), (d) → (IV)
- (B)(a) → (IV), (b) → (II), (c) → (I), (d) → (III)
- (C)(a) → (II), (b) → (IV), (c) → (I), (d) → (III)
- (D)(a) → (III), (b) → (I), (c) → (IV), (d) → (II)✓ Correct
Answer: (D)
Solution
High-density polythene is made by the stereoregular Ziegler-Natta catalyst, which builds the linear, tightly packing chains. Polyacrylonitrile is grown by free-radical addition started by a peroxide. Novolac is a phenol-formaldehyde resin set with an acid or base catalyst. Nylon-6 is made by the high-temperature, high-pressure condensation of its monomer. Matching accordingly, high-density polythene goes with the Ziegler-Natta catalyst, polyacrylonitrile with the peroxide, novolac with the acid or base catalyst, and nylon-6 with the condensation route.
JEE Main · 2019 · 10 Apr 2019 · Shift 2 · Single correct option