Solid $X$ is a very hard solid which is electrical insulator in solid as well as in molten state and has extremely high melting point. What type of solid is it?

Ionic solid

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Covalent solid

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Metallic solid

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Molecular solid

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Solution

The correct option is B Covalent solid
Covalent solids have high melting point due to their interconnected covalent bonds. Since there are no free electrons present in covalent solids, so they do not conduct electricity in solid state as well as molten state. Some of the examples are Diamond and Quartz.

Hence, the correct answer is option "B".

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Solid X is a very hard solid which is electrical insulator in solid as well as in molten state and has extremely high melting point. What type of solid is it?

Solid $X$ is a very hard solid which is electrical insulator in solid as well as in molten state and has extremely high melting point. What type of solid is it?