Page 128 - Science Class 6 Times Publication

d. Name the gas which is lled in a lament lamp.

i. Neon ii. Water vapour

iii. Hydrogen iv. Nitrogen

e. Which of the following is incorrect?

i. Air is a mixture of different gases.
ii. Air does not have weight.

iii. Air occupies space.
Iv. Air blows from one place to another.

2. Copy the correct statements and correct the false statements
if any:

a. Air is a mixture of different gases.

b. Nitrogen occupies 71% of total volume of air.
c. Helium, argon, nitrogen, and neon are inert gases.
d. Burning of rewood, petrol, diesel, etc is possible due to

carbon dioxide.

e. Carbon dioxide is mostly found in deep places like caves, well, etc.

f. Nitrogen is used by animals for the preparation of protein.

3. Answer these questions in short:

a. What is air? What are the main components of air?
b. Mention the composition of air.

c. Mention any four properties of air.
d. Mention any two uses of nitrogen.

e. Mention any three uses of oxygen.

4. Answer in detail:

a. How can you prove that air contains oxygen?
b. How can you prove that air contains carbon dioxide?

Times' Crucial Science and Environment 124 Book 6