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Q.

Is it true that graphite melts at 800℃?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is false.
The crystalline form of carbon is graphite. It consists of stacked layers of graphene. Around 3600℃  is the melting temperature of graphite, which causes it to sublime rather than melt. The melting point of graphite is similar to that of diamond, which is around 3600℃, and at this temperature, it does not melt; instead sublimes.
The correct statement would be that graphite sublimes around 3600℃.
 
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