SSLC (English Medium) कक्षा ८ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

______ is the distance between two consecutive particles.

______ is the number of vibrations of a particle in the medium, in one second

In any medium, as the ______ increases, the speed of sound also increases.

the speed of sound in air is 331 ms-1 at ______ and ______ at 22°C.

The amount of water vapour present in the air is known as ______.

______ is the ore of iron which is the strongest natural magnet.

Who laid the foundation for magnetism and suggested that the Earth has a giant bar magnet?

What is the other name of lodestone?

Mention the three types of iron ores.

Rancidity can be prevented by ______.

Fatty foods become rancid due to the process of ______.

Fishes and meat containing high levels of ______.

Write the effects of chemical reactions.

Reason out

Photolysis occurs in the atmosphere.

Is rotting fruit a chemical change?

Which substance is flushed in bags of potato chips to prevent rancidity?

In the process of electrolysis of water, the positive carbon electrode acts as ______.

______ is used to preserve food materials.

______ is called the king of chemicals

Acids are corrosive in nature. They corrode metals and hence are not stored in metal containers.