Electrochemistry Chapter 7 Chemistry 9th Class MCQ Test Preparation Federal

Total Questions: 25

Total Marks: 25

Time: 25 Mins

Question # 1

Solve

Question # 2

The desired product in the electrolysis of molten sodium chloride is _____.

Question # 3

The study of the exchange between electrical and chemical energy is called _____.

Question # 4

Corrosion of iron can be prevented by applying a coating of which of the following?

Question # 7

In preventing corrosion, aluminum acts as a/an _____.

Question # 8

Formation of water, in the presence of an electric spark, results in the _____.

Question # 10

Electrochemical corrosion can occurs only if:

Question # 11

Loss of hydrogen atoms by an element is called _____.

Question # 12

In an electrolytic cell, which ion would migrate through HCl solution to the positive electrode?

Question # 14

An electrochemical cell is also called _____.

Question # 15

Rusting is a special term given to the corrosion of which of the following metal?

Question # 16

Which of the following reactions are involved in rusting of iron?

Question # 17

In a dry cell, electrolyte paste consists of _____.

Question # 18

Question # 20

What is the purpose of porous asbestos lining in the Nelson cell during manufacture of NaOH from brine?

It prevents hydroxide ions entering cathode compartment, and chloride ions entering anode compartment.
It prevents hydroxide ions entering anode compartment.
It prevents chloride ions entering cathode compartment.
It prevents hydroxide ions entering cathode compartment.
It prevents hydroxide ions entering anode compartment, and chloride ions entering cathode compartment.

Question # 21

Brine is another name for _____.

Question # 22

An element whose oxidation number is decreased is said to have _____.