The reaction of aqueous KMnO₄ with H₂O₂ in acidic condition gives:
1. $M{n}^{4+}$ $and$ $O_2$
2. $M{n}^{2+}$ $and$ $O_2$
3. $M{n}^{2+}$ $and$ $O_3$
4. $M{n}^{4+}$ $and$ $Mn{O}_2$

The method used to remove the temporary hardness of water is-

1. Synthetic resins method

2. Calgon's method

3. Clark's method

4. Ion-exchange method

The incorrect statement among the following  regarding reaction of  ${\mathrm{H}}_2{\mathrm{O}}_2$ is -

1.  ${\mathrm{S}}^{-2}$ $\to$ $\mathrm{S}$ (acidic medium)

2.  $\mathrm{Pb}$ $\to$ ${\mathrm{PbSO}}_4$

3.  ${\mathrm{Fe}}^{3+}$ $\to$ ${\mathrm{Fe}}^{2+}$ (acidic medium)

4.  $\mathrm{KI}$ $\to$ ${\mathrm{I}}_2$

${\mathrm{H}}_2{\mathrm{O}}_2$ is stored in:

1. Iron container after the addition of stabilizer

2. Glass container after the addition of stabilizer

3. Plastic container after the addition of stabilizer

4. None of the above

The role of ${\mathrm{H}}_2{\mathrm{O}}_2$ when added to a solution containing ${\mathrm{KMnO}}_4$ $\mathrm{and}$ ${\mathrm{H}}_2{\mathrm{SO}}_4$ is of-

1. An oxidizing agent

2. A reducing agent

3. Both as an oxidizing as well as a reducing agent

4. None of the above

${\mathrm{H}}_2{\mathrm{O}}_2$ 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.

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

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.