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

Engineering

Chemistry

Classification of Solids

Question

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

Assertion A : Sharp glass 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 :

A is true but R is false.

A is false but R is true.

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

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

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On heating viscosity decreases, but does not have any relation with smoothing of glass on heating.