Question

Give a balanced chemical reaction for each of the following
Action of conc. nitric acid on sulphur

Answer 1

1. Concentrated nitric acid$(\mathrm{conc}.{\mathrm{HNO}}_3)$ acts as an oxidizing agent for sulphur.
2. So sulphur is converted to sulphur dioxide$\left({\mathrm{SO}}_2\right)$ and nitrogen dioxide$\left({\mathrm{NO}}_2\right)$ gas is evolved.
3. $\mathrm{S}+\underset{\mathrm{conc}.}{6{\mathrm{HNO}}_3}\to {\mathrm{H}}_2{\mathrm{SO}}_4+2{\mathrm{H}}_2\mathrm{O}+6{\mathrm{NO}}_2$