Which of the following carbide produces propyne on reaction with water.

Options

A. `CaC_(2)`
B. `Be_(2)C`
C. `Al_(4)C_(3)`
D. `Mg_(2)C_(3)`

Answer

D

Explanation

(A) `CaC_(2)+H_(2)O rarr Ca(OH)_(2)+HC equiv CH uarr`
(B) `Be_(2)C+2H_(2)O rarr 2 BeO+CH_(4) uarr`
(C) `Al_(4)C_(3)+12 H_(2)O rarr 4Al (OH)_(3)+3CH_(4) uarr`
(D) `Mg_(2)C_(3)+4H_(2)O rarr 2Mg(OH)_(2)+H_(3)C-C equiv CH uarr`