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Question
Which of the following has maximum melting point?
Which of the following has maximum melting point?
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Solution
The correct option is A SiC
Silicon Carbide, SiC is a covalent network solid with a structure similar to diamond. In silicon carbide, every atom of carbon and silicon is bonded with four strong covalent bonds to the neighboring atoms, so, to get it to convert to a vapor (technically, it doesn't really boil at atmospheric pressure, it gradually dissociates to the gaseous elements at about 2700 C) so, to get each atom to break away from the bulk material, you need enough energy to break all four bonds simultaneously, hence the very inert nature of SiC.
Hence, option A is the correct answer.
Silicon Carbide, SiC is a covalent network solid with a structure similar to diamond. In silicon carbide, every atom of carbon and silicon is bonded with four strong covalent bonds to the neighboring atoms, so, to get it to convert to a vapor (technically, it doesn't really boil at atmospheric pressure, it gradually dissociates to the gaseous elements at about 2700 C) so, to get each atom to break away from the bulk material, you need enough energy to break all four bonds simultaneously, hence the very inert nature of SiC.
Hence, option A is the correct answer.
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