question_answer 1)
Which of the following steps are used to treat industrial wastes and reduce pollution?
A)
Only (i) and (iii) done
clear
B)
Only (i) and (ii) done
clear
C)
Only (ii) and (iii) done
clear
D)
(i), (ii) and (iii) done
clear
View Solution play_arrow
question_answer 2)
Which of the following would happen in the absence of greenhouse effect in the atmosphere?
A)
Pollution will increase. done
clear
B)
The earths surface temperature will increase. done
clear
C)
The earths surface temperature remains the same. done
clear
D)
The depleted ozone layer will decrease the earths temperature. done
clear
View Solution play_arrow
question_answer 3)
The diagram given below shows a part of the nitrogen cycle.
Which of the labelled arrows indicates nitrogen fixation and denitrification?
Nitrogen fixation Denitrification P Q
A)
B)
done
clear
C)
D)
View Solution play_arrow
question_answer 4)
What is /are the likely consequences of deforestation?
A)
Carbon dioxide in the air increases. done
clear
B)
Destruction of habitats takes place. done
clear
C)
Mineral salts in the soil are washed away. done
clear
D)
All of the above done
clear
View Solution play_arrow
question_answer 5)
What kind of pollution is being caused if a factory releases waste products into a nearby stream?
A)
Air done
clear
B)
Noise done
clear
C)
Water done
clear
D)
Soil done
clear
View Solution play_arrow
question_answer 6)
Identify the given biogeo chemical cycle.
A)
Mineral cycle done
clear
B)
Nitrogen cycle done
clear
C)
Water cycle done
clear
D)
Oxygen cycle done
clear
View Solution play_arrow
question_answer 7)
Which of these statements are true about air?
A)
(i) and (ii) done
clear
B)
(ii) and (iii) done
clear
C)
(ii) and (iii) done
clear
D)
(i), (ii) and (iii) done
clear
View Solution play_arrow
question_answer 8)
What causes movement in air?
A)
Difference in temperature done
clear
B)
Difference in pressure done
clear
C)
Difference in volume done
clear
D)
Both [a] and [b] done
clear
View Solution play_arrow
question_answer 9)
Which of the following natural processes play(s) a role in the nitrogen cycle?
A)
Lightning done
clear
B)
Flood done
clear
C)
Storm done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 10)
The water cycle in nature involves which of the following processes sequentially?
A)
Evaporation, precipitation and condensation. done
clear
B)
Precipitation, condensation and evaporation. done
clear
C)
Evaporation, condensation and precipitation. done
clear
D)
Condensation, evaporation and precipitation. done
clear
View Solution play_arrow
question_answer 11)
What is the role of the bacteria in Root nodules of legumes
A)
To convert oxides of nitrogen into soil nitrates. done
clear
B)
To convert atmospheric nitrogen gas into soil nitrates. done
clear
C)
To convert soil nitrates into gaseous nitrogen. done
clear
D)
To convert plant proteins into ammonia. done
clear
View Solution play_arrow
question_answer 12)
Which of these statements is/are true about the given sample of air?
A)
Dissolved air from pond water done
clear
B)
Fresh air from a field done
clear
C)
Exhaled air done
clear
D)
Polluted air near a factory done
clear
View Solution play_arrow
question_answer 13)
How does photosynthesis help to maintain the percentage of oxygen and carbon dioxide in the atmosphere?
A)
By giving off carbon dioxide and absorbing oxygen. done
clear
B)
By giving off oxygen and absorbing carbon dioxide. done
clear
C)
By releasing oxygen and carbon dioxide. done
clear
D)
By absorbing oxygen and carbon dioxide. done
clear
View Solution play_arrow
question_answer 14)
Identify T in the given water cycle.
A)
Melting done
clear
B)
Condensation done
clear
C)
Evaporation done
clear
D)
Precipitation done
clear
View Solution play_arrow
question_answer 15)
Which of these methods is/are used to control water pollution?
A)
Only (i) and (ii) done
clear
B)
Only (ii) and (iii) done
clear
C)
Only (i), (ii), (iii) done
clear
D)
(i), (ii) and (iii) done
clear
View Solution play_arrow
question_answer 16)
Signs of eutrophication of water bodies include.
A)
reduced oxygen demand done
clear
B)
rapid decomposition of organic matter. done
clear
C)
algal bloom. done
clear
D)
fluorosis. done
clear
View Solution play_arrow
question_answer 17)
Which of the following is renewable natural resource?
A)
Sunlight done
clear
B)
Coal done
clear
C)
Soil done
clear
D)
Petroleum done
clear
View Solution play_arrow
question_answer 18)
Which of the following are the ways of conserving and preserving the earths natural resources?
A)
Recycling wastes done
clear
B)
Using alternative energy sources done
clear
C)
Reducing the wastage of non-renewable natural resources done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 19)
Which of the following natural disasters affect habitat in the environment?
A)
Droughts done
clear
B)
Floods done
clear
C)
The thinning of the ozone layer done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 20)
Which of the following are negative effects on the environment from the excessive use of fertilisers in a farm situated near a lake?
A)
Decreased oxygen content in the water done
clear
B)
Decreased light penetration in the water done
clear
C)
Decreased population of aquatic organisms done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 21)
Identify P in the given carbon cycle.
A)
Carbon compounds in animals done
clear
B)
Carbon compounds in plants done
clear
C)
Carbon dioxide in the air done
clear
D)
Coal and oil done
clear
View Solution play_arrow
question_answer 22)
Identify the labelled parts P and R in the given cycle:
A)
B)
C)
D)
View Solution play_arrow
question_answer 23)
Which of the following cause greenhouse effect?
A)
Only (i) and (ii) done
clear
B)
Only (i) and (iii) done
clear
C)
Only (ii) and (iii) done
clear
D)
(i), (ii) and (iii) done
clear
View Solution play_arrow
question_answer 24)
Which of the following processes involves the escaping of nitrogen into air from decaying matter?
A)
Nitrification done
clear
B)
Denitrification done
clear
C)
Nitrogen fixation done
clear
D)
Nitrogen assimilation done
clear
View Solution play_arrow
question_answer 25)
Which of the following are the adverse effects of deforestation?
A)
Reduced rainfall done
clear
B)
Soil erosion done
clear
C)
Destruction of habitat done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 26)
Which of the following functions is associated with nostoc?
A)
Photosynthesis done
clear
B)
Transpiration done
clear
C)
Nitrogen fixation done
clear
D)
Carbon fixation done
clear
View Solution play_arrow
question_answer 27)
Which of the following processes represents P, Q and R?
A)
P-Respiration, Q-Photosynthesis, R-Combustion. done
clear
B)
P-Respiration, Q-Combustion, R-Photosynthesis. done
clear
C)
P-Combustion, Q-Decay, R-Respiration. done
clear
D)
P-Decay, Q-Respiration, R-Photosynthesis. done
clear
View Solution play_arrow
question_answer 28)
Which of the following chemicals cause the thinning of layer P?
A)
Carbon monoxide done
clear
B)
Sulphur dioxide done
clear
C)
Chlorofluorocarbons done
clear
D)
Both [a] and [c] done
clear
View Solution play_arrow
question_answer 29)
The diagram shows the phenomenon of a natural disaster.
Which of the following is an effect of the disaster?
A)
Air pollution done
clear
B)
Greenhouse effect done
clear
C)
Water pollution done
clear
D)
Sound pollution done
clear
View Solution play_arrow
question_answer 30)
Which of the following processes labelled with arrows are brought about by bacteria?
A)
P and Q done
clear
B)
Q and R done
clear
C)
R and S done
clear
D)
S and P done
clear
View Solution play_arrow
question_answer 31)
Which of the following is/are caused due to deforestation?
A)
Soil erosion done
clear
B)
Depletion of water in the catchment areas done
clear
C)
Global warming done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 32)
Which of the following statements is true about the process shown below?
A)
It is caused by the decay of organic substances. done
clear
B)
It is an important process in the nitrogen cycle. done
clear
C)
It is carried out by green plants and certain bacteria. done
clear
D)
It is an essential process in living organisms to provide energy and in maintaining the balance between oxygen and carbon dioxide in the atmosphere. done
clear
View Solution play_arrow
question_answer 33)
Which of the following processes represents X, Y and Z in the given cycle?
A)
B)
C)
D)
View Solution play_arrow
question_answer 34)
Which of the following activities increase the concentration of carbon dioxide in the atmosphere?
A)
Deforestation done
clear
B)
Combustion of fuel done
clear
C)
Over hunting done
clear
D)
Both [a] and [b] done
clear
View Solution play_arrow
question_answer 35)
Which of the following processes represents X?
A)
Respiration done
clear
B)
Transpiration done
clear
C)
Combustion done
clear
D)
Evaporation done
clear
View Solution play_arrow
question_answer 36)
Which of the following will not cause an environmental pollution?
A)
Noise from vehicles done
clear
B)
The Using of chemical fertilisers done
clear
C)
Improper disposal of sewage done
clear
D)
The Using of a CFC free refrigerator done
clear
View Solution play_arrow
question_answer 37)
Which of the following gases cause acid rain?
A)
Carbon monoxide and carbon dioxide. done
clear
B)
Sulphur dioxide and oxides of nitrogen. done
clear
C)
Oxides of nitrogen and carbon dioxide. done
clear
D)
None of these. done
clear
View Solution play_arrow
question_answer 38)
Which of the following are essential for the maintenance of balance in the ecosystem?
A)
Water cycle done
clear
B)
Carbon cycle done
clear
C)
Nitrogen cycle done
clear
D)
All of these done
clear
View Solution play_arrow
question_answer 39)
Which of the following processes provides most of the oxygen found in the earths atmosphere?
A)
Photosynthesis done
clear
B)
Aerobic respiration done
clear
C)
Excretion done
clear
D)
Fermentation done
clear
View Solution play_arrow
question_answer 40)
Which of the following are caused due to the unplanned clearing of land?
A)
Only (i), (ii) and (iii) done
clear
B)
Only (i), (ii) and (iv) done
clear
C)
Only (i), (iii) and (iv) done
clear
D)
(i), (ii), (iii) and (iv) done
clear
View Solution play_arrow
question_answer 41)
The figure given below shows part of the carbon cycle.
K, L and M are processes that take place in the carbon cycle. Which of the following combinations represents K, L and M correctly?
A)
B)
C)
D)
View Solution play_arrow
question_answer 42)
Which of the human activity has added the largest amounts of carbon to the atmosphere?
A)
Burning fossil fuels done
clear
B)
Mining fossil fuels done
clear
C)
Increasing soil erosion done
clear
D)
Increasing food consumption done
clear
View Solution play_arrow
question_answer 43)
Which of the following materials of biological origin are commonly used to maintain and improve soil fertility?
A)
Green manure done
clear
B)
Biofertilisers done
clear
C)
Bioinsecticides done
clear
D)
Both [a] and [b] done
clear
View Solution play_arrow
question_answer 44)
Which of the following plays a major role in replacing oxygen in the atmosphere?
A)
Green plants done
clear
B)
The weathering of rocks done
clear
C)
Fossil-fuel combustion done
clear
D)
All of the above done
clear
View Solution play_arrow
question_answer 45)
Water is recycled in nature through the water cycle.
Which of the following processes are involved in the water cycle the most?
A)
(i) and (ii) done
clear
B)
(i) and (iii) done
clear
C)
(ii) and (iii) done
clear
D)
(i), (ii) and (iii) done
clear
View Solution play_arrow
question_answer 46)
Which of the following gases is regarded as an atmospheric pollutant?
A)
\[{{O}_{2}}\] done
clear
B)
\[{{O}_{3}}\] done
clear
C)
\[S{{O}_{2}}\] done
clear
D)
\[{{N}_{2}}\] done
clear
View Solution play_arrow
question_answer 47)
How do animals get their nitrogen?
A)
By absorbing nitrogen gas through the skin. done
clear
B)
By eating carbohydrates like sugars and starch. done
clear
C)
From nitrates in their drinking water. done
clear
D)
By eating plants and other animals. done
clear
View Solution play_arrow
question_answer 48)
Which of the following gases is/are produced by decomposers during the decaying process?
A)
Only carbon dioxide gas done
clear
B)
Only carbon dioxide and nitrogen gases done
clear
C)
Only oxygen gas done
clear
D)
Only carbon dioxide and oxygen gases done
clear
View Solution play_arrow
question_answer 49)
Which of the following reduce(s) air pollution?
A)
Only (i) done
clear
B)
(ii) and (iii) done
clear
C)
(i) and (iii) done
clear
D)
(i), (ii) and (iii) done
clear
View Solution play_arrow
question_answer 50)
Which of the following is the largest reservoir of carbon?
A)
Soil done
clear
B)
Atmosphere done
clear
C)
Ocean done
clear
D)
Sedimentary rocks done
clear
View Solution play_arrow