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Question:

X + H₂O → Y + CH₄
In the above reaction, an unknown component X on hydrolysis gives Y and methane gas. Identify X and Y.

CaC2,Al(OH)3

Al4C3,Al(OH)3

MgC2,Mg(OH)3

None of the above

Solution:

The correct option is B
Al₄C₃, Al(OH)₃
Al₄C₃ + 12H₂O → 4Al(OH)₃ + 3CH₄
So the X and Y are Al₄C₃, Al(OH)₃. Hence option B is correct.