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MULTIPLE CHOICE QUESTIONS: (MCQ’s)
1. On Venus, the atmosphere consists of only ______.
(a) Carbon dioxide
(b) Oxygen
(c) Nitrogen
(d) Water vapour
2. Large parts of India get rainfall from ______.
(a) South-West and North-East monsoons
(b) South-West and South-East monsoons
(c) South-West and North-West monsoons
(d) South-East and North-East monsoons
3. At night time there is ____.
(a) Low pressure on land and high pressure on water masses
(b) High pressure on land and low pressure on water masses
(c) Low pressure on both land and water masses
(d) High pressure on both land and water masses.
4. The visible indication of air pollution is _____.
(a) Rain
(b) Hail
(c) Smog
(d) Snow
5. Fixation of nitrogen is done _____.
(a) In the presence of sunlight
(b) During photosynthesis
(c) By chlorophyll
(d) During lightning
6. In the process of photosynthesis ____.
(a) Glucose is formed from oxygen and carbon dioxide is liberated
(b) Glucose is formed from carbon dioxide and Oxygen is liberated
(c) Nitrates and nitrites are formed from nitrogen and oxygen is liberated
(d) Nitrates and nitrites are formed from nitrogen and carbon dioxide is liberated
7. Photosynthesis is a process involved in _____.
(a) Water cycle and oxygen cycle
(b) Oxygen and carbon dioxide cycle
(c) Carbon dioxide and nitrogen cycle
(d) Nitrogen and water cycle
8. The components of fossil fuels responsible for acid rain are ____.
(a) Carbon and sulphur
(b) Carbon and nitrogen
(c) Sulphur and nitrogen
(d) Carbon, sulphur and nitrogen
9. Acid rain is caused by ____.
(a) Carbon dioxide
(b) Ozone
(c) Hydrocarbons
(d) Oxides of sulphur and nitrogen
10. The factors responsible for formation of soil as well as erosion of soil are ___.
(a) Sun and wind
(b) Wind and water
(c) Water and living organisms
(d) Living organisms and sun
11. The poisonous substances used by the paper industry are ____.
(a) Hydrocarbons
(b) CFC
(c) Mercury salts
(d) Oxides of sulphur and nitrogen
12. The moon has extreme climate during day and night time because _____.
(a) The moon is closer to the sun
(b) The atmosphere on the moon consists of carbon dioxide.
(c) It receives heat reflected from the earth.
(d) There is no atmosphere on the moon.
13. The water cycle is driven by ____.
(a) Wind energy
(b) Potential energy of water
(c) Kinetic energy of water
(d) Solar energy
14. The organisms responsible for fixation of atmospheric nitrogen are _____.
(a) Lichens
(b) Moss
(c) Bacteria
(d) Earthworms
15. Endoskeletons and exoskeletons of various animals are formed from ____.
(a) Sulphate salts
(b) Carbonate salts
(c) Nitrate salts
(d) Chloride salts
16. The depletion of the ozone layer is caused by ____.
(a) Carbon dioxide
(b) Nitric oxide
(c) Chlorofluorocarbons
(d) Hydrocarbons
17. Chlorofluorocarbons cause _____.
(a) Air pollution
(b) Water pollution
(c) Soil pollution
(d) Soil erosion
18. If there were no atmosphere around the Earth, the temperature of the Earth will ____
(a) Increase
(b) Go on decreasing
(c) Increase during day and decrease during night
(d) Be unaffected
(a) Increase
(b) Go on decreasing
(c) Increase during day and decrease during night
(d) Be unaffected
19. What would happen, if all the oxygen present in the environment is converted to ozone?
(a) We will be protected more
(b) It will become poisonous and kill living forms
(c) Ozone is not stable, hence it will be toxic
(d) It will help harmful Sun radiations to reach Earth and damage many life forms.
(a) We will be protected more
(b) It will become poisonous and kill living forms
(c) Ozone is not stable, hence it will be toxic
(d) It will help harmful Sun radiations to reach Earth and damage many life forms.
20. One of the following factors does not lead to soil formation in nature is ____
(a) Sun
(b) Water
(c) Wind
(d) None of the above
(a) Sun
(b) Water
(c) Wind
(d) None of the above
21. The two forms of oxygen found in the atmosphere are ____.
(a) Water and ozone
(b) Water and oxygen
(c) Ozone and oxygen
(d) Water and carbon dioxide
(a) Water and ozone
(b) Water and oxygen
(c) Ozone and oxygen
(d) Water and carbon dioxide
22. The process of nitrogen-fixation by bacteria does not take place in the presence of _____.
(a) Molecular form of hydrogen
(b) Elemental form of oxygen
(c) Water
(d) Elemental form of nitrogen
(a) Molecular form of hydrogen
(b) Elemental form of oxygen
(c) Water
(d) Elemental form of nitrogen
23. Among the given options, which one is not correct for the use of large amount of fertilisers and pesticides?
(a) They are eco-friendly
(b) They turn the fields barren after some time
(c) They adversely affect the useful component from the soil
(d) They destroy the soil fertility
(a) They are eco-friendly
(b) They turn the fields barren after some time
(c) They adversely affect the useful component from the soil
(d) They destroy the soil fertility
24. One of the following processes is not a step involved in the water-cycle operating in nature
(a) Evaporation
(b) Transpiration
(c) Precipitation
(d) Photosynthesis
(a) Evaporation
(b) Transpiration
(c) Precipitation
(d) Photosynthesis
25. Which of the following is not a greenhouse gas?
(a) Methane
(b) Carbon dioxide
(c) Carbon monoxide
(d) Ammonia
(a) Methane
(b) Carbon dioxide
(c) Carbon monoxide
(d) Ammonia
26. The outer crust of the earth is called as __________
(a) Exosphere
(b) Hydrosphere
(c) Lithosphere
(d) Mesosphere
27. The temperature on the surface of the moon ranges from _____ to ____
(a) − 190° C ,100° C
(b) − 190° C ,120° C
(c) − 190° C ,110° C
(d) − 90° C ,110° C
28. When water bodies are heated during the day a large amount of water _____
(a) Evaporates
(b) Transpires
(c) Dries up
(d) None of the above
(b) Transpires
(c) Dries up
(d) None of the above
29. Most of the water on earth is found in seas and oceans and is _____
(a) Saline
(b) Sweet
(c) Acidic
(d) All of the above
30. The ____ of the soil play an important role in preventing soil erosion
(a) Leaves
(b) Stem
(c) Roots
(d) Flowers
Answers:
1. (a) Carbon dioxide
2. (a) South-West and North-East monsoons
3. (b) High pressure on land and low pressure on water masses
4. (c) Smog
5. (d) During lightning
6. (b) Glucose is formed from Carbon dioxide and oxygen is liberated
7. (b) Oxygen and carbon dioxide cycle
8. (c) Sulphur and nitrogen
9. (d) Oxides of sulphur and nitrogen
10. (b) Wind and water
11. (c) Mercury salts
12. (d) There is no atmosphere on the moon
13. (d) Solar energy
14. (c) Bacteria
15. (b) Carbonate salts
16. (c) Chlorofluorocarbons
17. (a) Air pollution
18.(c) increase during day and decrease during night
19.(b) It will become poisonous and kill living forms
20.(d) Polythene bags
21.(c) Ozone and oxygen
22.(b) Elemental form of oxygen
23.(a) They are eco−friendly
24.(d) Photosynthesis
25.(d) Ammonia
26.(c) Lithosphere
27.(c) − 190° C ,110° C
28.(a) Evaporates
29.(a) Saline
30.(c) Roots
26.(c) Lithosphere
27.(c) − 190° C ,110° C
28.(a) Evaporates
29.(a) Saline
30.(c) Roots