Learn Class 8 Science - Chemical Effects of Electric Current

What are metals? And what are the electric effects of current? We all are aware that metal is a good conductor of electricity. At the same time, plastics are not the conductors of electricity. There are also many liquid conductors which become a source of electricity.

Electric current

The path consists of passing or taking current.
And the current flows in it even when the current’s path is closed.
Where the break-in path leads to no formation of current.

Chemical effects of electric current

The chemical reactions can occur when the current gets passed through the chemical solutions. It consists of:

Colour changes.
Metal Deposition
Gas bubbles form.

How to check current?

Many ways can help you to check current. These are:

1. Conductor:

The term ‘conductor’ refers to the tool which allows it to pass the current.

2. Tester:

A tester is a tool that helps to check the electric current.
In the tester, there is a presence of a led bulb.
The LED bulb will help you to determine the current.

Electrodes:

Two types:

Cathode
In the tester, there is a presence of a led bulb.
Anode

Electroplating:

Electroplating is the process of the deposition of layers. And this layer gets on the other material with the help of electroplating.

Learning Videos for 8th Grade Science - Chemical Effects of Electric Current

Chemical Effects of Electric Current Sample Questions for Class 8

Question 1

Chemical Effects of Electric Current Worksheet-7 Chemical Effects of Electric Current Worksheet-7 A cell converts

A. Electrical energy into chemical energy

B. Chemical energy into electrical energy

C. Magnetic energy into electrical energy

D. Electrical energy into mechanical energy

Question 2

Anode is:

A. positively charged electrode

B. negatively charged electrode

C. wire used to connect the electrodes

D. electrolyte which conducts electricity

Question 3

Match both the columns and select the correct option from the codes given below.

A. A.-(P),

B. -(Q),

C. -(R)B. A.-(Q), B.-(P), C.-(R)C. A.-(P), B.-(R), C.-(Q)

D. A.-(Q), B.-(R), C.-(P)

Question 4

When copper rod donates electrons to hydrogen ions, it gains ____ charge.

A. positive charge

B. negative charge

C. positive charge B. negative charge

D. positive charge B. negative chargeC. no charge

Question 5

Chemical Effects of Electric Current Worksheet-6 Chemical Effects of Electric Current Worksheet-6 Ammonium chloride in dry cell is

A. A paste

B. In liquid state

C. In solid state

D. In gaseous state