Question

Match the given metal salt, non-metal and metal with the gases evolved, when they react with $dil.HN{O}_3$

• A. $S{O}_2$
• B. $N{O}_2$
• C. $NO$

Answer 1

$HN{O}_3$ is a strong oxidising agent. It reacts with the given metal, metal salt and non-metal as follows :

$ZnS{O}_3+2HN{O}_3\to Zn(N{O}_3{)}_2+S{O}_2+H_{2}O$

$P+5HN{O}_3\to H_{3}P{O}_4+H_{2}O+5N{O}_2$

$3Fe+8HN{O}_3\to 3Fe(N{O}_3{)}_2+4H_{2}O+2NO$