Which of the following are ionic carbides?

C a C_{2}

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{A l}_{4} C_{3}

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S i C

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{B e}_{2} C

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Solution

The correct options are
A ${A l}_{4} C_{3}$
C $C a C_{2}$
D ${B e}_{2} C$
$C a C_{2}, {A l}_{4} {C l}_{3}$ and ${B e}_{2} C$ are ionic carbides but $S i C$ are covalent.
Hence options A,B & D are correct.

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