$S i C, C a C_{2}, B e_{2} C, A l_{2} C_{6}, A l_{4} C_{3}, B_{4} C$
How many of the given carbides are methanides?

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Solution

$B e_{2} C, A l_{4} C_{3}$ are methanides

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$S i C, C a C_{2}, B e_{2} C, A l_{2} C_{6}, A l_{4} C_{3}, B_{4} C$
How many of the given carbides are methanides?

$B e_{2} C, A l_{4} C_{3}$ are methanides