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Question
Assertion (A): Cotton is ironed at 400° F.
Reason (R): Cotton is a natural fibre made of cellulose which possess good heat resistance properties.
Options
A is true, but R is false.
A is false, but R is true.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, and R is not the correct explanation of A.
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Solution
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°F (204°C). The reason is entirely true and serves as the perfect explanation, as cotton is a vegetable fibre composed of natural cellulose polymers. 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.
