Q. When calcium carbide is added to water, the gas that is evolved is

106 176 KVPYKVPY 2009 Report Error

A

carbon dioxide

B

hydrogen

C

acetylene

D

methane

Solution:

When calcium carbide is added to water, acetylene gas is evolved. The reaction can be written as
$(Calcium carbide) C a C_{2} + 2 H_{2} O ⟶ C a (O H)_{2} + (Acetylene) C H \equiv C H$