Assertion (A): Cotton is ironed at $400^\circ$ F. Reason (R): Cotton is a natural fibre made of cellulose which possess good heat resistance properties.

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KollegeApply · Accepted Answer

Both A and R are true, and R is the correct explanation of A. Explanation: The assertion is true because the standard, recommended temperature for ironing cotton garments to remove stubborn wrinkles effectively is $400^\circ$F ($204^\circ$C)TgQPHd||[]. The reason is entirely true and serves as the perfect explanation, as cotton is a vegetable fibre composed of natural cellulose polymersTgQPHd||[]. Its chemical structure gives it exceptional heat-resistant properties, allowing the fabric to withstand heavy ironing pressure and high temperatures without scorching, melting, or degrading.

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