In basic medium, ${\mathrm{H}}_2{\mathrm{O}}_2$ exhibits which of the following reactions?
(A) ${\mathrm{Mn}}^{2+}\to {\mathrm{Mn}}^{4+}$
(B) ${\mathrm{I}}_2\to {\mathrm{I}}^{-}$
(C) $\mathrm{PbS}\to {\mathrm{PbSO}}_4$
Choose the most appropriate answer from the options given below :

Given below are two statements: One is labelled as Assertion A and the other labelled as reason $\mathrm{R}$

Assertion $\mathrm{A}:$ During the boiling of water having temporary hardness, $\mathrm{Mg}{\left({\mathrm{HCO}}_3\right)}_2$ is converted to ${\mathrm{MgCO}}_3$

Reason $\mathrm{R}:$ The solubility product of $\mathrm{Mg}(\mathrm{OH}{)}_2$ is greater than that of ${\mathrm{MgCO}}_3$.

In the light of the above statements, choose the most appropriate answer from the options given below:

Match List-I with List-II :

Choose the correct match :

Statement I : Sodium hydride can be used as an oxidising agent.

Statement II : The lone pair of electrons on nitrogen in pyridine makes it basic.

Choose the CORRECT answer from the options given below :

The correct statements about ${\mathrm{H}}_2{\mathrm{O}}_2$ are :

(A) used in the treatment of effluents.

(B) used as both oxidising and reducing agents.

(C) the two hydroxyl groups lie in the same plane.

(D) miscible with water.

Choose the correct answer from the options given below :

Given below are two statements:

Statement I : ${\mathrm{H}}_2{\mathrm{O}}_2$ can act as both oxidising and reducing agent in basic medium.

Statement II : In the hydrogen economy, the energy is transmitted in the form of dihydrogen. In the light of the above statements, choose the correct answer from the options given below: