Chemistry - 9 Chapter - 8Electro Chemistry Test - 3

Chemistry - 9 Chapter - 8
Electro Chemistry
Test - 3

1. Those substances through which electric current cannot pass are called non-conductors or insulators.

a) True
b) False

2. All metals are conductors of electricity?

a) False
b) True

3. All non-metals except ______ are non-conductors.

a) Graphite
b) Plastics
c) Hydrogen
d) Oils

4. Solutions of ionic compounds, for example, sodium chloride, potassium bromide etc are conductors.

a) False
b) True

5. Solutions of covalent compounds, for example, urea, sugar etc are non-conductors.

a) True
b) False

6. Define Electrolysis?

a) Electrolysis is the passage of electricity through compounds or their aqueous solutions, to decompose them into their constituents.
b) Electrolysis is the passage of electricity through fused ionic compounds or their aqueous solutions, to decompose them into their constituents.

7. What is meant by word decompose?

a) To break down into materials or elements that makes up the compound.
b) To unify into materials or elements that makes up the compound.

8. Aqueous solutions consist mostly of water.

a) False
b) True

9. Define Electrolytes?

a) Electrolytes are defused ionic compounds or their aqueous solutions through which electricity can be passed to decompose them.
b) Electrolytes are fused ionic compounds or their aqueous solutions through which electricity can be passed to decompose them.

10. Define Non-Electrolytes?

a) Electrolytes are those compounds through which electricity cannot pass.
b) Non-electrolytes are those compounds through which electricity cannot pass.

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