JEE Main 2016 · 9 Apr · Shift 1 · Chemistry Q57

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ChemistrySingle correct+4 / -1Question 57 of 90

Assertion : Rayon is a semisynthetic polymer whose properties are better than natural cotton.

Reason : Mechanical and aesthetic properties of cellulose can be improved by acetylation.

Both assertion and reason are correct, and the reason is the correct explanation for the assertion.

Both assertion and reason are correct, but the reason is not the correct explanation for the assertion.

Assertion is incorrect statement, but the reason is correct.

Both assertion and reason are incorrect.

Answer and worked solution

Official answer: A

Rayon is made by chemically modifying natural cellulose, so it is semisynthetic, and its lustre and strength are improved over cotton. Acetylation is one such modification (acetate rayon), so the reason explains the assertion.

Topics:Common polymers Carbohydrates

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JEE Main 2016 · 9 Apr · Shift 1, Chemistry question 57