${\mathrm{H}}_2{\mathrm{O}}_2$ act as a reducing agent in :

1. Reaction with a ferrous salt.

2. Reaction with iodides.

3. Reaction with lead sulphide.

4. Reaction with ${\mathrm{KMnO}}_4$ in an acid medium.

$H_2{O}_2$ turns an acidified solution of ........... to orange-red.

(1) $Ba{O}_2$

(2) $Pb{O}_2$

(3) $N{a}_2{O}_2$

(4) $Ti{O}_2$

$H_2{O}_2$ cannot be formed by which of the following reaction?

(1) Electrolysis of 50% $H_{2}S{O}_4(aq.)$

(2) Hydrolysis of $H_{2}S{O}_5$

(3) Action of $H_{2}O on Ba{O}_2$

(4) Action of $H_{2}O on Mn{O}_2$

The correct statement among the following regarding H₂O₂ is-

1. Two hydrogen atoms are connected to one oxygen atom.

2. All the four atoms are in the same plane.

3. The four atoms are arranged in a non-linear and non-planar manner.

4. O-H bonds are polar but the molecule is non-polar.

The oxidising nature of ${\mathrm{H}}_2{\mathrm{O}}_2$ is shown in the reaction-

1. ${\mathrm{H}}_2{\mathrm{O}}_2+2\mathrm{KI}\to 2\mathrm{KOH}+{\mathrm{I}}_2$

2. ${\mathrm{Cl}}_2+{\mathrm{H}}_2{\mathrm{O}}_2\to 2\mathrm{HCl}+{\mathrm{O}}_2$

3. ${\mathrm{H}}_2{\mathrm{O}}_2+{\mathrm{Ag}}_2\mathrm{O}\to 2\mathrm{Ag}+{\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_2$

4. $\mathrm{NaClO}+{\mathrm{H}}_2{\mathrm{O}}_2\to \mathrm{NaCl}+{\mathrm{H}}_2\mathrm{O}+{\mathrm{O}}_2$

$H_2{O}_2$ on treatment with chlorine gives:

(1) $H_2$

(2) oxygen

(3) HOCl

(4) $Cl{O}_2$

For the bleaching of hair, the substance used is:

1. ${\mathrm{SO}}_2$

2. Bleaching powder

3. ${\mathrm{H}}_2{\mathrm{O}}_2$

4. ${\mathrm{O}}_3$

Decolourisation of acidified potassium permanganate by ${\mathrm{H}}_2{\mathrm{O}}_2$  is due to:

1. Oxidation of ${\mathrm{KMnO}}_4$

2. Reduction of ${\mathrm{KMnO}}_4$

3. Both oxidation and reduction of ${\mathrm{KMnO}}_4$

4. None of the above.

$H_2{O}_2 reduces K_3\left[Fe{\left(CN\right)}_6\right] in:$

(1) neutral solution

(2) acidic solution

(3) alkaline solution

(4) non-polar medium

Tellurium hydride on dissolution in water gives:

(1) $H_{2}Te+H_{2}O\rightleftharpoons H_3{O}^{+}+HT{e}^{-}$

(2) $H_{2}Te+H_{2}O\rightleftharpoons H_{3}T{e}^{+}+O{H}^{-}$

(3) $H_{2}Te+H_{2}O\to TeO+2H_2$

(4) None of these