JEE Main 2021 · 20 July · morning · Single correct · +4 / −1

Given below are two statements. One is labelled as Assertion A nd the other is labelled as Reason R.
Assertion A : Sharp glass edge becomes smooth on heating it upto its melting point.
Reason R : The viscosity of glass decreases on melting.
Choose the most appropriate answer from the options given below.

  1. (a) A is true but R is false
  2. (b) Both A and R are true but R is NOT the correct explanation of A.
  3. (c) A is false but R is true.
  4. (d) Both A and R are true and R is the correct explanation of A.
Answer and solution

Answer (b) Both A and R are true but R is NOT the correct explanation of A.

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Asked about 40 times in JEE Main since 2020. This question is from 2021.