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Q. Calcium carbide reacts with heavy water to form two products as shown below.
Calcium carbide $+$ Heavy water $\longrightarrow C _{x} D _{x}+ Ca ( OD )_{x}$
The value of $x$ is ___.

Hydrogen

Solution:

Calcium carbide $+$ Heavy water $\longrightarrow C _{x} D _{x}+ Ca ( OD )_{x}$
The balanced chemical equation for the reaction is written as:
$CaC _{2}+2 D _{2} O \longrightarrow C _{2} D _{2}+ Ca ( OD )_{2}$
So, value of ' $x$ ' is $2$ .