SSLC (English Medium) Class 6 - Tamil Nadu Board of Secondary Education Question Bank Solutions

______ change results in the change of the substance.

The percentage composition of Nitrogen in Ureas is ______.

Burning of paper is the best example of ______ change.

Water boiling into water vapour is an example of chemical change.

Chemists identify gypsum as a natural indicator.

The water we drink is a combination of hydrogen and oxygen.

Match the following:

Analogy:

H₂O: Water:: NaCl: ______.

What is the use of indicator?

Write some materials prepared by chemical changes.

______ is a natural indicator.

Arrange the following statements in correct sequence:

1. One side is water-loving and other water-hating molecules.
2. When you agitate the cloth, the dirt is surrounded by many molecules and taken away from the cloth.
3. The dirt surrounded by the detergent molecules floats in the water making it dirty.
4. Finally, the cloth is clean.
5. The detergent molecules have two sides.
6. Water hating goes and joins with dirt and oil in the cloth while the water-loving joins with the water molecules.

These are abiotic factors.

1. Sunlight
2. Bacteria
3. Air
4. Plants

From the earliest time ______ have been the staple food of India.

1. Rice
2. Millet
3. Oats
4. Pulses

The wealth of any country largely depends upon its ______.

Plants, based on their economic values and uses, may be broadly classified into ______ categories.

Analogy:

Protect from scurvy: Amla:: Bronchitis, expectorant: ______.

Define – Economic botany.

Give evidence for the fact that Rice, Wheat, and Millets were cultivated and utilized in the ancient days.

Classify plants on the basis of economic values and uses.