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Properties and Usage of Graphite

Why graphite ...

Question

Why graphite has higher melting point than diamond ?

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Solution

In diamond every carbon atom shares four of its available electrons with other carbon atoms, forming a tetrahedral network. This network is very strong and rigid, thus the diamond is hard. Thus, the bond between carbon atoms in diamond is very strong and hence diamond has a high melting point.

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Q. Graphite has a melting point than/to that of diamond.

Q. With respect to graphite and diamond, How many statement(s) given below is/are correct
1.Graphite is harder than diamond
2.Graphite has higher electrical conductivity than diamond
3.Graphite has higher thermal conductivity than diamond
4.Graphite has higher

C - C

bond order than diamond

Q. (a) Explain why diamond has a high melting point.
(b) State any two uses of diamond.

KCl has higher melting point than AgCl. Why?

[ $r_{A g^{+}}$ $\approx$ $r_{K^{+}}$ ]

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