QQuestion
For the preparation of N2 gas in the laboratory, the mixed aqueous solution of which of the following two compounds is used?
- NaNO2 and NH4Cl
- NaNO3 and NH4Cl
- NaCI and NH4NO3
- NaNO3 and NH4NO3
✓Answer
a. NaNO₂ and NH₄Cl
Explanation:
In the laboratory, nitrogen gas is prepared by reacting sodium nitrite (NaNO₂) with ammonium chloride (NH₄Cl) in aqueous solution:
NaNO₂ + NH₄Cl → N₂ ↑ + 2H₂O + NaCl
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