Reactions Due to Electricity

Q.

A cation is formed when an atom ___________ one or more __________

Q. The process in which the substances undergo decomposition by absorption of electrical energy is called ___________.

1. electrolysis
2. photolysis
3. thermolysis
4. catalysis

Q.

During electroplating, the electrolyte solution must contain the _________ of its compound.

1. Metal

2. Non metal

3. Salt

4. None of these

Q.

Choose the correct option:

The principle of electrolysis is used in

1. Extraction of metal

2. Purification of metals

3. Electroplating

4. All of these

Q. Identify the examples of ions.

1. ${\text{Cl}}^{-}$
2. Na
3. ${\text{Mg}}^{+2}$
4. Cu
5. ${\text{HCO}}_3^{-}$
6. Fe
7. ${\text{Fe}}^{+2}$
8. ${\text{Cu}}^{+2}$
9. Zn

Q. The process of electroplating involves a/an reaction.

1. electrochemical
2. photochemical
3. thermochemical

Q. During the electrolysis of copper sulphate solution the copper gets deposited on the carbon rod.

1. False
2. True

Q.

Chemical reactions in which the electrical energy is consumed or produced are known as:

1. Neutralization reaction

2. Exothermic reactions

3. Thermochemical reactions

4. Electrochemical reactions

Q. An atom which carries a charge is known as a/an .

1. molecule
2. ion
3. element
4. compound

Q. Chlorine is produced by _______ of brine solution.

1. photolysis
2. thermolysis
3. electrolysis
4. catalytic reduction

Q.

What do you understand by the term ‘anion’?

Q.

Electrolysis of water is a/an ____ reaction.

1. exothermic

2. displacement

3. combination

4. endothermic

Q.

Electrolysis of water is a/an ____ reaction.

1. exothermic

2. displacement

3. combination

4. endothermic

Q. During the electrolysis the change in colour of copper sulphate solution proves that a chemical change has occurred.

1. True
2. False