Chemistry - 9 Chapter - 8Electro Chemistry Test - 5

Chemistry - 9 Chapter - 8
Electro Chemistry
Test - 5

1. Define Strong Electrolytes? Short..Answer…….Remember.by.Heart………………….
An electrolyte which completely ionizes in water.

a) An electrolyte which completely ionizes in water.
b) An electrolyte which do not ionize in water.

2. Define Weak Electrolyte? Short..Answer…….Remember.by.Heart………………….
An electrolyte which undergoes partial ionization in water

a) An electrolyte which undergoes complete ionization in water
b) An electrolyte which undergoes partial ionization in water

3. What is Ionization?

a) Ionization is the process of splits up of electrolyte into uncharged particles upon heating or in its aqueous solution.
b) Ionization is the process of splits up of electrolyte into charged particles upon heating or in its aqueous solution.

4. What is the formula to find out degree of ionisation?

a) Degree of ionisation = number of molecules which do not ionize / Total number of molecules
b) Degree of ionisation = number of molecules which ionize / Total number of molecules

5. ______ do not ionise.

a) Non-electrolytes
b) Two answers are correct
c) Covalent compounds

6. According to the modern theory, electrovalent compounds exist in ionic form even in the solid state.

a) False
b) True

7. Water is a ---------- electrolyte.

a) Strong
b) Good
c) Weak

8. Water is a non-electrolyte.

a) True
b) False

9. In pure water, out of 6x10^8 molecules only -------- molecule is ionised.

a) 10,000
b) 2
c) 3000
d) 1

10. a. What is added in water to increase its conductivity?

a) A little quantity of sodium
b) A few drop of pure sulphuric acid
c) A few drop of dilute sulphuric acid

This is more feedback!

This is the feedback!