Question

By which of the following processes, pure nitrogen gas is prepared?

• A. $\left( NH _{4}\right)_{2} Cr _{2} O _{7} \xrightarrow{\Delta}$
• B. $NH _{4} Cl + NaNO _{2} \xrightarrow{\Delta}$
• C. $NH _{3}+ NaNO _{2} \xrightarrow{\Delta}$
• D. $N _{2} O + Cu \xrightarrow{\Delta}$

Answer 1

Answer: (B)

$NH _{4} Cl + NaNO _{2} \xrightarrow{\Delta}$

Answer 2

In laboratory, pure $N _{2}$ gas is prepared by heating $NH _{4} Cl$ with sodium nitrite.