Solid State

Question

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.

Accepted Answer

Option B. On heating the glass, it melts and takes up rounded shape at the
edges, which has minimum surface area. This is due to the property
of surface tension of liquids and not due to decrease in viscosity.

More on Solid State

Solid State

More on Solid State