Q.

Which one of the following is a covalent carbide?

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a

Mg2C

b

Al4C3

c

SiC

d

Li3C2

answer is D.

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Detailed Solution

SiC is a covalent carbide, rest are ionic carbides.

There are only two carbides that are considered completely covalent; they are formed with the two elements that are most similar to carbon in size and electronegativity, boron (B) and silicon (Si). Silicon carbide (SiC) is known as carborundum.

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