CH-15 AIR AROUND US

Major part of the air is constituted by

• NITROGEN

• OXYGEN

• CARBON DIOXIDE

• NONE

Which of the following gas we use in breathing?

• a) Carbon dioxide

• (b) Nitrogen

• (c) Oxygen

• (d) None of these

Wind is

• a) air around us

• (b) rising hot air

• (c) air in motion

• (d) none

Air is present in

• (a) atmosphere

• (b) soil

• c) water of ponds, lakes and seas

• (d) everywhere

Which is not a property of air?

• (a) It occupies space.

• (b) It is transparent,

• (c) It is a solution

• (d) It is a compound.

The ratio of nitrogen to oxygen in the air is

• (a) 1:4

• (b) 4:1

• (c) 3:1

• (d) 1:2

The main constituent of the air is.

• (a) nitrogen

• (b) oxygen

• (c) carbon dioxide

• NONE

We cannot see air.

• TRUE

• FALSE

Air is a compound and not an element

• TRUE

• FALSE

Air is an opaque material.

• TRUE

• FALSE