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JEE Main levelSingle correct optionDifficulty 2 of 3df025

Which of the following is an interstitial compound?

A $CaC X_{2}$
B $TiC$
C $NaCl$
D $Al X_{4} C X_{3}$

Answer: B

In

TiC

small C atoms occupy the voids of the metallic Ti lattice, giving a hard, high-melting, conducting solid.

CaC X_{2}

and

Al X_{4} C X_{3}

are salt-like carbides with discrete

C X_{2} X^{2 -}

or

C X^{4 -}

, and

NaCl

is ionic.

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