MCQ on Air

CBSE/NCERT 7th Class MCQ CBSE/NCERT 7th Class MCQ on Geography

MCQ on Air

1- ………………… in the atmosphere creates a green house effect by trapping the heat radiated from the earth. Therefore it is called green house gas.

(A) Carbon dioxide

(B) Oxygen

(C) Nitrogen

(D) Ozone


2- If there is no greenhouse effect, what will be the impact on the earth?

(A) Earth will be too cold to live

(B) Earth will be too hot to live

(C) No effect will be on earth

(D) None of the above


3- If there is no greenhouse effect, then what will be the effect on the environment?

(A) The earth will be to cold to live

(B) The earth will become uninhabitable

(C) The earth will be to hot to live

(D) No effect


4- When the level of greenhouse effect in atmosphere increases due to factory smoke or car fumes, the heat retained increase the temperature of the earth. This is called ……………

(A) Increase in oxygen

(B) Green house warming

(C) Global warming

(D) None of the above


5-Which of the following statements are correct?

    Due to Global warming:

a.Snow in the coldest parts of the world to melt.

b.Sea level rises in the causing flood in the coastal areas.

c. With the rise in temperature there will be a change in climate.

(A) Only a and b options are correct

(B) Only c is correct

(C) All are correct

(D) None of the above is correct


6- Name the two most important gases of atmosphere which makes the bulk of the atmosphere.

(A) Helium and Ozone

(B) Oxygen and Nitrogen

(C) Hydrogen and Oxygen

(D) Oxygen and Helium


7- ……………… the plentiful gas in the air.

(A) Oxygen

(B) Nitrogen

(C) Oxygen

(D) Helium


8- Which gas in atmosphere is necessary for the survival of Plants?

(A) Argon

(B) Oxygen

(C) Nitrogen

(D) Helium


9- …………….is a major component of Chlorophyll, the compound which plant use sunlight energy to produce sugars from water and carbon dioxide.

(A) Argon

(B) Helium

(C) Oxygen

(D) Nitrogen


10- Plant takes nitrogen through …………… that live in the soil and roots of some plants.

(A) Bacteria

(B) Insects

(C) Humus

(D) None of the above



1-(A), 2-(A), 3-(B), 4-(C), 5-(C), 6-(B), 7-(B), 8-(C), 9-(D), 10-(A)