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

The process of separating the grains from their chaffs is called ______.

Match the following:

Complete the analogy.

Knot in a thread : ______ friction :: Ball bearing : ______ friction.

______ was the first manned mission of NASA to go to the moon.

Write a note on Apollo missions.

What happens when carbon dioxide is passed through lime water? Write the equation for this reaction.

Solar energy is a non depleting energy. Justify.

______ was the first man landing mission to go to the Moon.

What are the most popular missions of NASA?

Differentiate inorganic compounds and organic compounds.

Tabulate some important compounds that exist in a gaseous state.

Write a note on the classification of compounds.

Lighter metals like Na and K combine with CO₂ to form corresponding ______.

What do you mean by aerated water?

Explain the physical properties of carbon dioxide.

During electrolysis, hydrogen and oxygen are obtained in the ratio of 1: 2.

What is dry ice? What are its uses?

It is said that sleeping beneath the tree during the night is not good for health. What is the reason?

Find the valency of the element which is underlined in the following formula.

1. NaCl
2. CO₂
3. Al (PO₄)
4. Ba (NO₃)₂
5. CaCl₂

Write the chemical formula for the following compounds

1. Aluminium sulphate
2. Silver nitrate
3. Magnesium oxide
4. Barium chloride