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.

पर्याय

• 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.

Answer 1

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.