Multiple Choice Questions
Multiple Choice Questions
Q.1. Which of the following is not a greenhouse gas ?
(a) CO2
(b) N2O
(c) CH4
(d) O2
Q.2. Which parts/belongings of animals are particularly susceptible to temperature changes ?
(a) Eggs and larvae
(b) Eggs and feathers
(c) Eggs and hair
(d) Eggs and skin
Q.3. Which of the following is the major factor in deciding soil structure ?
(a) Particle size
(b) Humus
(c) Water table
(d) Moisture content
Q.4. The factor which decides the type of soil is :
(a) Amount of humus
(b) Amount of moisture
(c) Average size of particles
(d) Microscopic organisms
Q.5. The large-scale deforestation that is happening all over the world is causing :
(a) Loss of biodiversity
(b) Soil erosion
(c) Global warming
(d) All of these
Q.6. Which type of soil is more likely to be removed very quickly ?
(a) The soil having a vegetative cover
(b) Topsoil that is base of vegetation
(c) The soil covered with grass
(d) All of these
Q.7. Name an important factor that decides biodiversity in a particular area :
(a) The quality of topsoil
(b) The quantity of topsoil
(c) The quality of groundwater
(d) The quantity of groundwater
Q.8. Carbon containing molecules present in all life forms includes:
(a) Carbon dioxide, carbonates and hydrogen carbonates
(b) Nucleic acids, carbon dioxide, carbonates and hydrogen carbonates
(c) Proteins, carbohydrates, fats, nucleic acids and vitamins
(d) Hormones, carbohydrates, carbonates and hydrogen carbonates
Q.9. In nature, carbon is found in elemental forms as :
(a) Carbon dioxide and carbonates
(b) Diamond and graphite
(c) Hydrogen carbonates and graphite
(d) Carbon dioxide and graphite
Q.10. The endoskeletons and exoskeletons of various animals are also formed from:
(a) Carbonate salts
(b) Sulphate salts
(c) Nitrate salts
(d) Chloride salts
Q.11. The nitrogen molecules present in air can be converted into nitrates and nitrites by :
(a) A biological process of nitrogen fixing bacteria present in soil
(b) A biological process of carbon fixing factor present in soil
(c) Any of the industries manufacturing nitrogenous compounds
(d) The plants used as cereal crops in field
Q.12. 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
Q.13. The term “water pollution” can be defined in several ways. Which of the following statements does not give the correct definition ?
(a) The addition of undesirable substances to water bodies
(b) The removal of desirable substances from water bodies
(c) A change in pressure of the water bodies
(d) A change in temperature of the water bodies
Q.14. Soil erosion can be prevented by :
(a) Raising forests
(b) Deforestation
(c) Excessive use of fertilizer
(d) Overgrazing by animals
Q.15. What happens when rain falls on soil without vegetational cover ?
(a) Rainwater percolates in soil efficiently
(b) Rainwater causes loss of surface soil
(c) Rainwater leads to fertility of the soil
(d) Rainwater does not cause any change in soil
Q.16. Oxygen is harmful for:
(a) Ferns
(b) Nitrogen fixing bacteria
(c) Chara
(d) Mango tree
Q.17. The atmosphere of the earth is heated by radiations which are mainly :
(a) Radiated by the sun
(b) Re-radiated by land
(c) Re-radiated by water
(d) Re-radiated by land and water
Q.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
Q.19. Major source of mineral in soil is the :
(a) Parent rock from which soil is formed
(b) Plants
(c) Animals
(d) Bacteria
Q.20. Total earth’s surface covered by water is:
(a) 75%
(b) 60%
(c) 85%
(d) 50%
Q.21. Topsoil contains the following:
(a) Humus and living organisms only
(b) Humus and soil particles only
(c) Humus, living organisms and plants
(d) Humus, living organisms and soil particles
Q.22. Choose the correct sequences :
(a) CO2 in atmosphere decomposers → orgarnic carbon in animals → organic carbon in plants
(b) CO2 in atmosphere organic carbon in plants → organic carbon in animals → inorganic carbon in soil
(c) Inorganic carbonates in water → organic carbon in plants organic carbon in animals scavengers
(d) Organic carbon in animals → decomposers → CO2 in atmosphere → organic carbon in plants
Q.23. 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
Q.24. Rainfall patterns depend on :
(a) The underground water table
(b) The number of water bodies in an area
(c) The density pattern of human population in an area
(d) The prevailing season in an area
Q.25. Among the given options, which one is not correct for the use of large amount of fertilizers and pesticides ?
(a) They are eco-friendly
(b) They turn the fields barren after sometime
(c) They adversally affect the useful component from the soil
(d) They destroy the soil fertility
Q.26. Growth of Lichens on barren rocks is followed by the growth of:
(a) Moss
(b) Ferns
(c) Gymnosperms
(d) Algae
Q.27. Marked temperature changes in aquatic environment can affect :
(a) Breeding of animals
(b) More growth of aquatic plants
(c) Process of digestion in animals
(d) Availability of nutrients
Q.28. Biotic component of biosphere is not constituted by:
(a) Producers
(b) Consumers
(c) Decomposer
(d) Air
Q.29. An increase in carbon dioxide content in the atmosphere would not cause :
(a) More heat to be retained by the environment
(b) Increasing in photosynthesis in plants
(c) Global warming
(d) Abundance of desert plants
Q.30. What would happen, if all the oxygen present in the environment is converted to ozone ?
(a) We will be protected more
(b) it will be poisonous come 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
Q.31. One of the following factors does not lead to soil formation in nature :
(a) The sun
(b) Water
(c) Wind
(d) Polythene bags
Q.32. 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
Q.33. Which step is not involved in the carbon cycle ?
(a) Photosynthesis
(b) Transpiration
(c) Respiration
(d) Burning of fossil fuels
Q.34. ‘Ozone-hole’ means:
(a) A large sized hole in the ozone layer
(b) Thinning of the ozone layer
(c) Small holes scattered in the ozone layer
(d) Thickening of ozone in the ozone layer
Q.35. Ozone layer is getting depleted because of :
(a) Excessive use of automobiles
(b) Excessive formation of industrial units
(c) Excessive use of man-made compounds containing both fluorine and chlorine
(d) Excessive deforestation
Q.36. Oxygen is returned to the atmosphere mainly by:
(a) Burning of fossil fuel
(b) Respiration
(c) Photosynthesis
(d) Fungi
Q.37. Low visibility during cold weather is due to :
(a) Formation of fossil fuel
(b) Unburnt carbon particles or hydrocarbons suspended in air
(c) Lack of adequate power supply
(d) None of these
Q.38. Which of the following is a recently originated problem of environment ?
(a) Ozone layer depletion
(b) Greenhouse effect
(c) Global warming
(d) All of these
Q.39. When we breathe in air, nitrogen also goes inside along with oxygen. What is the fate of this nitrogen ?
(a) It moves along with oxygen into the cells
(b) It comes out with the CO2 during exhalation
(c) It is absorbed only by the nasal cells
(d) Nitrogen concentration is already more in the cells so it is not at all absorbed
Q.40. Smog is a combination of:
(a) Smoke and fog
(b) Smoke and light
(c) Fog and light
(d) All are correct
Follow on Facebook page – Click Here
Google News join in – Click Here
Read More Asia News – Click Here
Read More Sports News – Click Here
Read More Crypto News – Click Here