Question

Methanides are :

• A. Mg2C3 , Be2C, Al4C3 and CaC2
• B. Mg2C3 , Be2C and Al4C3
• C. Be2C, Al4C3 and CaC2
• D. Be2C and Al4C3

Answer 1

Answer: (D)

Be2C and Al4C3

Answer 2

Methanides give CH4 on reaction with H2O.

Al4C3 + 12H2O$\longrightarrow$4Al (OH)3 + 3CH4 ; Be2C +

4H2O $\longrightarrow$2Be (OH)2 + CH4