SSLC (English Medium) Class 8 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

______ seeds transfer their unique characteristics to the descents.

Which of the following increases friction?

Name the material which is used to reduce friction.

Give two examples to reduce friction.

The most common industrial application of chemical effects of electric current is ______.

The terminal which is connected to a positive terminal of a battery is called ______.

Liquids that conduct electricity are the solutions of ______.

______ is used in the extraction and purification of metals.

Match the following

Assertion: Parts of cars and bicycles are made iron with chromium coating.
Reason: Chromium does not corrode and resist scratches.

Name the process which shows the chemical effect of electric current?

State some advantages of electroplating.

What are anodes and cathodes?

CO₂, N₂O, CH_4, and CFC are known as ______.

The increase in the levels of greenhouse gases results in a gradual increase in the temperature of the earth’s surface.

Assertion: Greenhouse gases maintain the temperature.
Reason: Greenhouse gases absorb infrared rays.
Answer:

Name some greenhouse gases.

What is green house effect?

Write the names for the following compounds,

1. Aluminum sulphate
2. Silver nitrate.

Explain the specific ways to be followed while naming chemical compounds?