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JEE Main 2025 Apr 3 Shift 2, Chemistry Q13: Polymers

JEE Main2025Apr 3, Shift 2Chemistry
Q.

Given below are two statements :

Statement I : Wet cotton clothes made of cellulose based carbohydrate takes comparatively longer time to get dried than wet nylon polymer based clothes.

Statement II : Intermolecular hydrogen bonding with water molecule is more in nylon-based clothes than in the case of cotton clothes.

In the light of above statements, choose the Correct answer from the options given below

  1. A

    Statement I is false but Statement II is true

  2. B

    Statement I is true but Statement II is false

  3. C

    Both Statement I and Statement II are true

  4. D

    Both Statement I and Statement II are false

Solution

Cellulose chains carry many free OH groups per glucose unit, providing abundant sites for hydrogen bonding with water. This strong H-bonding traps water within the fibre, so cotton dries slowly. Statement I is therefore true.

Nylon, a polyamide, exposes far fewer H-bonding sites to water than cellulose does. Hydrogen bonding with water is greater in cotton, not in nylon. Statement II reverses this and is false.

Statement I is true, Statement II is false, matching option (2).

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