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Which of the following compounds can be used to obtain free nitrogen?(a) NaNO2(b) HNO2(c) HNO3(d) Ba3N2The question was posed to me in homework.I need to ask this question from P-Block Elements topic in division P-Block Elements of Chemistry – Class 12

Answer»

Correct option is (a) NaNO2

Easy explanation: NaNO2, sodium nitriteis the only convenient compound that can be used to OBTAIN free nitrogen, EVEN in laboratories. Sodium nitrite can be REACTED with ammonium chloride, both in aqueous form, producing NaCl and nitrogen, N2 along with water and small traces of HNO3 and NO.



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