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

The propellant of a rocket is only in the form of solids.

Explain the parts of a rocket.

The liquid metal used in thermometers is

Mention any three compounds that exist in liquid state.

Burning of matchstick is an example for chemical reaction caused by _______

_______ undergoes rusting.

Which of the following factor induces electrtolysis?

In Haber’s process of producing ammonia _______ is used as a catalyst.

Iron objects undergo rusting when exposed to _______ and _______.

Electrolysis of brine solution gives _______ gases.

Decomposition of lead nitrate is an example for a chemical reaction caused by light.

Formation of slaked lime from quicklime is an endothermic reaction.

Light energy may come out due to chemical reactions.

Match the following.

What is pollution?

What happens to the brine during electrolysis?

On heating, calcium carbonate gives calcium oxide and oxygen. Is it an exothermic reaction or an endothermic reaction?

Explain any three conditions that are required for a chemical reaction to take place. Give example.

Palanikumar is a Lawyer. He lives in a luxurious flat. Due to high rent, he wants to shift his residence to a place where he has a chemical industry nearby. There the rent is very cheap and the area is less populated also. His son Rajasekar, studying VIII, does not like this and likes to go to some other place.

1. Is Rajasekar right in his attitude?
2. Why did he refuse to go there?
3. What are the values shown by Rajasekar?

Define the following.

Freezing point