JEE Main 2022 · 29 Jul · Shift 2 · Chemistry Q79

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ChemistrySingle correct+4 / -1Question 79 of 90

Given below are two statements. One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Amylose is insoluble in water.

Reason R: Amylose is a long linear molecule with more than 200 glucose units.

In the light of the above statements, choose the correct answer from the options given below.

Both A and R are correct and R is the correct explanation of A.

Both A and R are correct but R is NOT the correct explanation of A.

A is correct but R is not correct

A is not correct but R is correct.

Answer and worked solution

Official answer: D

Amylose is the water-soluble component of starch (amylopectin is the insoluble part), so A is wrong. R correctly describes amylose as a long unbranched chain of 200 or more glucose units.

(D)

Topics:Carbohydrates

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JEE Main 2022 · 29 Jul · Shift 2, Chemistry question 79