Which is not obtained when metal carbides react with \( \mathrm{H}_{2} \mathrm{O} \) ?....

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Which is not obtained when metal carbides react with
\( \mathrm{P} \)
\( \mathrm{H}_{2} \mathrm{O} \) ?
W
(1) \( \mathrm{Al}_{4} \mathrm{C}_{3}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CH} \equiv \mathrm{CH} \)
(2) \( \mathrm{CaC}_{2}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CH} \equiv \mathrm{CH} \)
(3) \( \mathrm{Mg}_{4} \mathrm{C}_{3}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CH}_{3} \mathrm{C} \equiv \mathrm{CH} \)
(4) \( \mathrm{Be}_{2} \mathrm{C}+\mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CH}_{4} \)


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