Explain the following giving reason why `HNO_3` can act as oxidising agent only while `HNO_2` can act as both oxidising and reducing agent .

H_2S acts only as reducing agent while SO_2 acts as an oxidising as well as reducing agent. Why?

Why HNO_2 behaves as oxidising as well as reducing agent?

Explain the following: Same substance can act both colloids and crystalloids.

Give reason Conc HNO_3 can be transported in aluminium container

Complete the following chemical reaction equations. P_4 + NaOH+H_2O rarr , I^-(aq)+H_2O(l)+O_3(g) rarr . H_2S acts only as reducing agent while SO_2 acts as an oxidising as well as reducing agent. Why?

Ozone acts as a powerful oxidizing agent. Give reason.

Give reason: Ce(4+) is used as an oxidising agent in volumetric analysis.