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Which of the following are ionic carbides ?
A. `CaC_(2)`
B. `Al_(4)C_(3)`
C. `SiC`
D. `Be_(2)C`

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Correct Answer - A::B::D
Carbides of metals (e.g., `Ca, Al` and `Be`) are ionic whereas non-metal and metalloids (e.g., `Si`) are covalent.

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