p-Block elementsHard

Question

Which of the following give(s) ethyne on reaction with water?

Options

A.Al2 (C2)3
B.Al4 C3
C.SrC2
D.Mg2 C3

Solution

Compounds containing C22- gives ethyne on reaction with H2O.
  2+SrC22- +  2H2O →  Sr(OH)2 + CH ≡ CH
Similary Al2(C2)3 gives ethyne.

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