Question

State if the following statements are True or False. Correct the false statement.
1. The principal gases of the air are hydrogen and helium.
2. Oxygen is collected by the downward displacement of water.
3. A catalyst is a substance that alters the rate of a chemical reaction.
4. Oxygen is lighter than air.
5. The action of dilute sulphuric acid on marble chips produces carbon dioxide.​

Answer 1

Answer:

1. False

2.True

3.True

4.False

5.True

Answer 2

Answer:

B. Write 1 against principles promoting economic equality, 2 against Gandhian principles and

3 against general principles.

Right to an adequate means of livelihood

Organization of village panchayats

Promotion of cottage industries

Promotion of international peace

Assistance for the unemployed

Protection of places of historical interest