| List-I | Polymer | List-II | Type/ Class |
| (A) | Nylon-2-Nylon-6 | (I) | Thermosetting polymer |
| (B) | Buna-N | (II) | Biodegradable polymer |
| (C) | Urea-formaldehyde | (III) | Synthetic rubber resin |
| (D) | Dacron | (IV) | Polyester |
Understanding the properties and applications of polymers helps in correctly identifying their types. For example, biodegradable polymers like Nylon-2-Nylon 6 decompose naturally, while synthetic rubbers like Buna-N are used for their elasticity
The correct match is:
Final Answer: (2)
A substance 'X' (1.5 g) dissolved in 150 g of a solvent 'Y' (molar mass = 300 g mol$^{-1}$) led to an elevation of the boiling point by 0.5 K. The relative lowering in the vapour pressure of the solvent 'Y' is $____________ \(\times 10^{-2}\). (nearest integer)
[Given : $K_{b}$ of the solvent = 5.0 K kg mol$^{-1}$]
Assume the solution to be dilute and no association or dissociation of X takes place in solution.