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

The element which possesses the character of both metals and non metals are called ______.

______ is used as semiconductor.

Give two examples for metalloids.

Write three properties of metalloids.

Which of the following is true about oxygen?

Aerated water contains

Solvay process is a method to manufacture

Carbon dioxide with water changes

Nitrogen is _______ than air.

Match the following.

List out the uses of nitrogen.

Write about the reaction of nitrogen with non metals.

Soda bottle bursts sometimes when it is opened during summer. Why?

How do astronauts breathe when they go beyond the earth’s atmosphere?

Which of the following is a water pollutant?

Excessive use of chemical fertilizers depletes the soil and causes water pollution.

Explain the different ways by which water gets polluted.

Why microorganisms are essential for agriculture?

How can we improve the beneficial bacterial count in human beings?

Write a short note on probiotics.