During solidification of a pure molten metal, the grains in the casting near the mould wall are

Q. During solidification of a pure molten metal, the grains in the casting near the mould wall are

A. coarse and randomly oriented

B. fine and randomly oriented

C. fine and ordered

D. coarse and ordered

Ans: fine and randomly oriented

Sol:

During solidification of pure metal at the surface of the mould due to the fast rate of solidification, randomly oriented fine grains are produced.