AIR AROUND US

The components of air which is taken by Plants to prepare the food?

(a) O₂

(b) N₂

(c) CO₂

(d) None of these

• A

• B

• C

• D

Which of the following is NOT present in air?

(a) Oxygen

(b) Nitrogen

(c) Helium

(d) Iron

• A

• B

• C

• D

Which gas is produced by plants during photosynthesis?

(a) Nitrogen

(b) Carbon Dioxide

(c) Hydrogen

(d) Oxygen

• A

• B

• C

• D

What are the users of Oxygen?

(a) Living being

(b) Combustion of fuel

(c) Rusting of iron

(d) All the above

• A

• B

• C

• D

The presence of water vapor is Air is important for

(a) Water Cycle

(b) Ozone layer

(c) Combustion

(d) None of the above

• A

• B

• C

• D

What is not true of Air?

(a) It is odorless and colorless

(b) It occupier space and has weight

(c) it can be compressed and stored

(d) None of these

• A

• B

• C

• D

Statement A: Nitrogen is used in protein synthesis

Statement B: Proteins are required by living organisms to grown and repair their body parts

(a) Statement A is correct only

(b) Statement B is correct only

(c) Both the statement is correct

(d) Both the statement are incorrect

• A

• B

• C

• D

Which of the following gas helps in burning? ,

(a) Nitrogen

(b) Oxygen

(c) Carbon dioxide

(d) Carbon monoxide

• A

• B

• C

• D

Wind is

(a) air around us

(b) rising hot air

(c) air in motion

(d) none of these

• A

• B

• C

• D

Air is present in

(a) atmosphere

(b) soil

(c) water of ponds, lakes and seas

(d) everywhere

• A

• B

• C

• D