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Chemistry Question 58 – JEE-MAIN 2025

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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

Consider the chemical structure of cellulose (cotton) and nylon, specifically the presence of functional groups that can interact with water.

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Ninja Strategy•Relate Statements Logically

Recognize that the drying time (Statement I) is directly related to the extent of hydrogen bonding with water (Statement II). If one is true, the other's truth value is constrained.

Step 1: Analyze Statement I✦ Active

Statement I claims that wet cotton clothes take longer to dry than wet nylon clothes. Cotton is primarily cellulose, a carbohydrate polymer rich in hydroxyl (−OH) groups. These hydroxyl groups form extensive hydrogen bonds with water molecules, making cotton highly hydrophilic and capable of absorbing a significant amount of water. Nylon is a polyamide, which also forms hydrogen bonds with water through its amide groups (N−H and C=O), but generally to a lesser extent than cellulose. Due to its higher hydrophilicity and greater water retention, cotton indeed takes comparatively longer to dry than nylon. Thus, Statement I is true.

Step 2: Analyze Statement II○ Expand

Statement II claims that intermolecular hydrogen bonding with water molecules is more in nylon-based clothes than in cotton clothes. This contradicts the conclusion from Statement I. If nylon formed more hydrogen bonds with water, it would be more hydrophilic and would take longer to dry, which is contrary to the observation in Statement I and general knowledge. Cotton (cellulose) has a higher density of hydrogen bonding sites (hydroxyl groups) compared to nylon, leading to stronger and more extensive interactions with water. Therefore, Statement II is false.

Step 3: Combine Conclusions and Select Option○ Expand

Based on the analysis, Statement I is true, and Statement II is false. Comparing this with the given options, option 3 states 'Statement I is true but Statement II is false', which matches our findings.

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