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  4. Which of the following gives propyne on hydrolysis?

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Q. Which of the following gives propyne on hydrolysis?

AIIMSAIIMS 2005Hydrocarbons

Solution:

Magnesium carbide on hydrolysis gives propyne.
$Mg _{2} C _{3}+4 H _{2} O \longrightarrow \underset{\text{propyne}}{CH _{3} C \equiv CH} +2 Mg ( OH )_{2}$
$Al _{4} C _{3}+12 H _{2} O \longrightarrow \underset{\text{Methane}}{3 CH _{4}} \uparrow+4 Al ( OH )_{3}$