Chemical Effect of Electric Current

Q.

Which of the following processes produces electricity in the electric cell?

1. Chemical process

2. Evaporation of chemicals in the electric cell

3. Nuclear fission process

4. Nuclear fusion process

Q.

Solution A is a strong acid, Solution B is a weak acid, Solution C is a strong alkali

1. Which solution contains solute molecules in addition to water molecules?

Q.

Identify the substance that is widely used as electrodes in batteries.

1. Graphite

2. Coke

3. Lampblack

4. Wood charcoal

Q. In the electrolyse of water, which of the following gases are released?

1. Hydrogen
2. Carbon dioxide
3. Nitrogen
4. Oxygen

Q.

The accurate representation of a series combination of cells obtaining maximum potential is

1. $\left(\mathrm{i}\right)$

2. $\left(\mathrm{ii}\right)$

3. $\left(\mathrm{iii}\right)$

4. $\left(\mathrm{iv}\right)$

Q.

How many 1.5 V cells will be required to make a battery of 12 V ?

1. 4

2. 6

3. 8

4. 10

Q.

GIVE ONE WORD FOR THE FOLLOWING

Rate of flow of charge carriers.

Q. Why is salt added to tap water during electrolysis?

1. To increase conductivity.
2. To increase temperature.
3. To decrease conductivity.
4. To decrease temperature.

Q. Due to chemical effect of electric current, substances can be split or combined at the molecular level.

1. True
2. False