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Sharp glass edges are ……….. For making t...

Sharp glass edges are ……….. For making them smooth.

A

cooled

B

hammered

C

polished

D

heated

Text Solution

Verified by Experts

The correct Answer is:
D
On heating , the glass melts and the surface of the liquid tends to take the rounded shape at the edges, which makes the edges smooth. This is called fire polishing of glass. For any given quantity of liquid , the sphere offers the minimum surface area.
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