Chemical Effect of Electric Current

Q. Positive terminal of the dry cell is a graphite rod coated with manganese dioxide.

1. True
2. False

Q. Which among the following cells have the maximum shelf life?

1. Dry cell
2. Lead acid cell
3. Lithium ion cell
4. Nickel cadmium cell

Q. ___ cells are used in radio sets.

1. Lithium ion
2. Nickel-Cadmium
3. Dry
4. Lead-Acid

Q. In a lead-acid cell, the reason for development of positive and negative charge on the electrodes is ____.

1. external heating of both the electrodes
2. external current supply to both the electrodes
3. chemical reactions between the electrodes and electrolytes
4. external current supply through the electrolyte

Q. Due to the _____ used in the dry cell, the chemical reaction proceeds very slowly.

1. wet pulp
2. ammonium chloride
3. graphite rod
4. zinc metal

Q. When the chemical energy inside the cell is used up, the cell stops producing electricity.

1. True
2. False

Q.

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

1. Nuclear fission process

2. Nuclear fusion process

3. Chemical process

4. Evaporation of chemicals in the electric cell

Q. Suppose that an alkaline dry cell was manufactured using cadmium metal rather than zinc. What happens to emf?

1. There will be no change in emf.
2. The voltage would increase.
3. The voltage would decrease.
4. The setup will not work.