Electrolysis of Water

Q. During electrolysis of water, and are liberated at anode and cathode respectively.

1. hydrogen
2. oxygen
3. nitrogen
4. water vapour

Q. What is the chemical composition of water?

1. 2 volumes of hydrogen and 2 volumes of oxygen.
2. 2 volumes of hydrogen and 1 volume of oxygen.
3. 1 volume of hydrogen and 1 volume of oxygen.
4. 1 volume of hydrogen and 2 volumes of oxygen.

Q.

During electrolysis of copper sulphate, ___ gets formed at the anode.

1. Copper
2. Copper sulphate
3. Hydrogen
4. Oxygen

Q.

What will happen when a test tube containing oxygen gas is brought near a burning incense stick?

1. the incense stick will stop burning

2. the incense stick will burn with more blaze

3. the incense stick will burn more feebly

4. no change will be observed

Q. is added to make pure water conduct electricity.

1. Salt
2. Benzene
3. Sugar

Q.

Hydrogen reacts with oxygen to produce a pale blue-colored flame.

1. True
2. False

Q.

Identify the following substance that is underlined: A Gas which does not conduct electricity in the liquid state but conducts electricity when dissolved in water.

Q. The substance obtained at the anode during the electrolysis of water is:

1. Hydrogen
2. Water vapour
3. Dilute sulphuric acid
4. Oxygen

Q. Statement 1: During the electrolysis of water, the volume of gas obtained at anode is more than the volume of gas obtained at cathode.

Statement 2: Hydrogen is obtained at cathode and oxygen is obtained at anode during the electrolysis of water.

1. Assertion is false but reason is true.
2. Both assertion and reason are true and reason is the correct explanation of assertion.
3. Both assertion and reason are true but reason is not the correct explanation of assertion.
4. Assertion is true but reason is false.

Q. Which of the following compounds can make pure water conduct electricity?

1. $\text{NaCl}$
2. $\text{NaOH}$
3. ${\text{H}}_2{\text{SO}}_4$
4. $\text{HCl}$

Q. During electrolysis of copper sulphate, ___ gets deposited at the cathode.

1. Copper
2. Copper sulphate
3. Hydrogen
4. Oxygen

Q. The substance obtained at the cathode during the electrolysis of acidified water is:

1. Hydrogen
2. Water vapour
3. Dilute sulphuric acid
4. Oxygen

Q. Choose the correct statement(s) regarding electrolysis of water from the options given below:

1. The gas released at anode is hydrogen.
2. The gas released at cathode is oxygen.
3. The gas released at cathode burns with a pop sound.
4. The gas released at anode supports combustion.

Q. Q.In chlor alkali process, why NaOH is near cathode why it is not near anode?

Q. During electrolysis of copper sulphate, bubbles are formed at the cathode.

1. False
2. True

Q. During electrolysis of copper sulphate, blue copper sulphate gets deposited at the anode.

1. True
2. False

Q. Water vapour is collected at the anode during electrolysis of water.

1. True
2. False

Q.

Identify the following substance that is underlined: A Gas which does not conduct electricity in the liquid state but conducts electricity when dissolved in water.

Q. Normal water is made of whereas heavy water is made of

1. hydrogen and oxygen
2. calcium and oxygen
3. tritium and oxygen
4. deuterium and oxygen

Q.

8. Which of the following types of water is a bad conductor of electricity?

1. distilled water

2. water obtained in ion exchange process

3. mineral water

4. Both (a) and (b)

Q.

When we do electrolysis we give dilute sulphuric acid ( CONTAINS HYDROGEN ) in the water.

When the electricity is passed, the hydrogen and oxygen are collected.

The hydrogen which is collected is of Sulphuric acid or of the water ? Why ?