Chemistry - 9 Chapter - 8Electro Chemistry Test - 7

Chemistry - 9 Chapter - 8
Electro Chemistry
Test - 7

1. When I is current in amperes, t is time in seconds and Q is the quantity of electricity passing through the electrolyte, the formula to find out Coulombs will be?

a) Q=I x v
b) Q=v x t
c) Q=I x w
d) Q=l x t

2. Define Faraday's Law of Electrolysis?

a) When the same quantity of electricity is passed, for the same time, through different electrolytes connected in parallal, the substances deposited at the electrodes will be in the ratio of their chemical equivalents.
b) When the same quantity of electricity is passed, for the same time, through different electrolytes connected in series, the substances deposited at the electrodes will be in the ratio of their chemical equivalents.

3. What is the utility of Faraday's laws?

a) Faraday's laws are very useful for the determination of chemical equivalents of different substances.
b) Faraday's laws are very useful for the determination of electrochemical equivalents of different substances.

4. Which equation is used to find out Electrochemical equivalent (Z) when Quantity of substance deposited is (W) and Quantity of electricity passed is (Q )

a) Z=Q/W
b) Z=W/Q
c) Z=WXQ
d) Z=Q+W

5. What are Anions?

a) Negative ions
b) neutral ions
c) Positive ions

6. An electrochemical cell is also called?

a) A voltaic cell
b) A galvanic cell
c) Both answers are correct

7. What is meant by voltaic?

a) Production of direct electric current by chemical action
b) Production of indirect electric current by chemical action

8. Galvanic means relating to chemically produced direct current.

a) True
b) False

9. What is direct current?

a) The current which do not follow only one direction from negative to positive charge.
b) The current which follows only one direction from negative to positive charge.

10. Flow of current is actually the movement of electrons from negative to positive charge.

a) False
b) True

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