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Reaction of Metals with Water or Steam

During solidi...

Question

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

A

fine and ordered

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B

coarse and ordered

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C

coarse and randomly oriented

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D

fine and randomly oriented

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Solution

The correct option is D fine and randomly oriented
During solidification of pure metal at the surface of the mould due to the fast rate of solidification, randomly oriented fine grains are produced.

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