Discussion
On hydrolysis, aluminium carbide produces
Answer: A
Aluminium carbide gives methane, CH4.
Al4C3 is a methanide: it contains isolated C4− centres, each of which takes four protons from water.
\[ \begin{aligned} &\text{Al}_{4}\text{C}_{3} + 12\text{H}_{2}\text{O} \\ &\rightarrow 4\text{Al(OH)}_{3} + 3\text{CH}_{4} \end{aligned} \]
Ethyne (C2H2) is what an acetylide such as CaC2, with C22− units, gives on hydrolysis. Ethane and ethene are not produced by hydrolysis of any common ionic carbide.
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