Of the two solvents $H_{2}O and D_{2}O$, NaCl dissolves:

(1) equally in both

(2) only in $H_{2}O$

(3) more in $D_{2}O$

(4) more in $H_{2}O$

Heavy water is ......% heavier than ordinary water

1. 11

2. 20

3. 25

4. 15

The decomposition of $H_2{O}_2$ can be slowed down by the addition of small amount of phosphoric acid which act as:

(1) stopper

(2) detainer

(3) inhibitor 

(4) promoter

The hair dyes available in the market generally contain two bottles, one containing the dye and the other hydrogen peroxide. Before applying the dye, the two solutions are mixed. The hydrogen peroxide:

(1) is added to dilute the solution of the dye

(2) oxidizes the dye to give the desired color

(3) reduces the dye to give the desired color

(4) acidifies the solution of the dye

Benzene is oxidised by $H_2{O}_2$ in the presence of $FeS{O}_4$ to:

1. phenol

2. cyclohexane

3. benzaldehyde

4. benzoic acid

The rubber foam is produced by passing oxygen through rubber foaming material. This oxygen is released from:

(1) nitric oxide

(2) hydrogen peroxide

(3) Water 

(4) $C{O}_2$

${\mathrm{H}}_2{\mathrm{O}}_2$ 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

Acidified $KMn{O}_4$ is decolourised by:

(1) oxygen

(2) hydrogen

(3) nitric oxide

(4) nascent hydrogen

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

The correct statement among the following regarding reaction of  $H_2{O}_2$  with potassium ferrocyanide to ferricyanide is -

(1) $F{e}^{2+}\to F{e}^{3+}$

(2) $Fe\to F{e}^{2+}$

(3) $F{e}^{3+}\to F{e}^{2+}$

(4) $F{e}^{2+}\to F{e}^{+}$