Environmental Chemistry Practice Questions - DPP for JEE

 Page 1


1. High concentration of which of the following in atmosphere leads to
stiffness of flower buds which eventually fall off from plants?
(a) NO
2
(b) SO
2
(c) CFC
(d) Smog
2. Green house gases
(a) allow shorter wavelength to enter earth’s atmosphere while doesn’t
allow longer wavelength to leave the earth’s atmosphere.
(b) allow longer wavelength to enter earth atmosphere while doesn’t allow
shorter wavelength to leave the surface
(c) don’t have wavelength specific character.
(d) show wavelength specific behaviour near the earth while far from earth
these have wavelength independent behaviour.
3. Soil is polluted by
I. pesticides
II. synthetic fertilizers
Page 2


1. High concentration of which of the following in atmosphere leads to
stiffness of flower buds which eventually fall off from plants?
(a) NO
2
(b) SO
2
(c) CFC
(d) Smog
2. Green house gases
(a) allow shorter wavelength to enter earth’s atmosphere while doesn’t
allow longer wavelength to leave the earth’s atmosphere.
(b) allow longer wavelength to enter earth atmosphere while doesn’t allow
shorter wavelength to leave the surface
(c) don’t have wavelength specific character.
(d) show wavelength specific behaviour near the earth while far from earth
these have wavelength independent behaviour.
3. Soil is polluted by
I. pesticides
II. synthetic fertilizers
III. green manure
Choose the correct option.
(a) I and III
(b) I and II
(c) II and III
(d) I, II and III
4. Water is often treated with chlorine to
(a) remove hardness
(b) increase oxygen content
(c) kill germs
(d) remove suspended particles
5. Which of the following is/are the hazardous pollutant(s) present in
automobile exhaust gases?  
(i) N
2
(ii) CO
(iii) CH
4
(iv) Oxides of nitrogen
(a) (ii) and (iii)
(b) (i) and (ii)
(c) (ii) and (iv)
(d) (i) and (iii)
6. “Reducing potentially hazardous waste through smarter production”.
This represents a great step forward for
(a) green revolution
(b) green chemistry
(c) industrial revolution
(d) green biotechnology
7. When rain is accompanied by a thunderstorm, the collected rain water
will have a pH value
(a) slightly lower than that of rain water without thunderstorm
Page 3


1. High concentration of which of the following in atmosphere leads to
stiffness of flower buds which eventually fall off from plants?
(a) NO
2
(b) SO
2
(c) CFC
(d) Smog
2. Green house gases
(a) allow shorter wavelength to enter earth’s atmosphere while doesn’t
allow longer wavelength to leave the earth’s atmosphere.
(b) allow longer wavelength to enter earth atmosphere while doesn’t allow
shorter wavelength to leave the surface
(c) don’t have wavelength specific character.
(d) show wavelength specific behaviour near the earth while far from earth
these have wavelength independent behaviour.
3. Soil is polluted by
I. pesticides
II. synthetic fertilizers
III. green manure
Choose the correct option.
(a) I and III
(b) I and II
(c) II and III
(d) I, II and III
4. Water is often treated with chlorine to
(a) remove hardness
(b) increase oxygen content
(c) kill germs
(d) remove suspended particles
5. Which of the following is/are the hazardous pollutant(s) present in
automobile exhaust gases?  
(i) N
2
(ii) CO
(iii) CH
4
(iv) Oxides of nitrogen
(a) (ii) and (iii)
(b) (i) and (ii)
(c) (ii) and (iv)
(d) (i) and (iii)
6. “Reducing potentially hazardous waste through smarter production”.
This represents a great step forward for
(a) green revolution
(b) green chemistry
(c) industrial revolution
(d) green biotechnology
7. When rain is accompanied by a thunderstorm, the collected rain water
will have a pH value
(a) slightly lower than that of rain water without thunderstorm
(b) slightly higher than that when the thunderstorm is not there
(c) uninfluenced by occurrence of thunderstorm
(d) which depends upon the amount of dust in air
8. The irritant red haze in the traffic and congested places is due to
presence of  which of the following ?
(i) Oxides of sulphur
(ii) Oxides of nitrogen
(iii) Carbon dioxide
(iv) Mists, smoke and dust
(v) Smog
(a) (i), (iv) and (v)
(b) (iii) only
(c) (ii) only
(d) (ii) and (v)
9. Formation of photochemical smog takes place in
(a) winter during day time
(b) summer during morning time
(c) summer during day time
(d) winter during morning time
10. B.O.D. test or biochemical oxygen demand test is made for measuring
(a) air pollution
(b) water pollution
(c) noise pollution
(d) soil pollution
11. The smog is essentially caused by the presence of
(a) Oxides of sulphur and nitrogen
(b) O
2
 and N
2
(c) O
2
 and O
3
(d) O
3
 and N
2
12. Ozone layer of stratosphere requires protection from indiscriminate use
Page 4


1. High concentration of which of the following in atmosphere leads to
stiffness of flower buds which eventually fall off from plants?
(a) NO
2
(b) SO
2
(c) CFC
(d) Smog
2. Green house gases
(a) allow shorter wavelength to enter earth’s atmosphere while doesn’t
allow longer wavelength to leave the earth’s atmosphere.
(b) allow longer wavelength to enter earth atmosphere while doesn’t allow
shorter wavelength to leave the surface
(c) don’t have wavelength specific character.
(d) show wavelength specific behaviour near the earth while far from earth
these have wavelength independent behaviour.
3. Soil is polluted by
I. pesticides
II. synthetic fertilizers
III. green manure
Choose the correct option.
(a) I and III
(b) I and II
(c) II and III
(d) I, II and III
4. Water is often treated with chlorine to
(a) remove hardness
(b) increase oxygen content
(c) kill germs
(d) remove suspended particles
5. Which of the following is/are the hazardous pollutant(s) present in
automobile exhaust gases?  
(i) N
2
(ii) CO
(iii) CH
4
(iv) Oxides of nitrogen
(a) (ii) and (iii)
(b) (i) and (ii)
(c) (ii) and (iv)
(d) (i) and (iii)
6. “Reducing potentially hazardous waste through smarter production”.
This represents a great step forward for
(a) green revolution
(b) green chemistry
(c) industrial revolution
(d) green biotechnology
7. When rain is accompanied by a thunderstorm, the collected rain water
will have a pH value
(a) slightly lower than that of rain water without thunderstorm
(b) slightly higher than that when the thunderstorm is not there
(c) uninfluenced by occurrence of thunderstorm
(d) which depends upon the amount of dust in air
8. The irritant red haze in the traffic and congested places is due to
presence of  which of the following ?
(i) Oxides of sulphur
(ii) Oxides of nitrogen
(iii) Carbon dioxide
(iv) Mists, smoke and dust
(v) Smog
(a) (i), (iv) and (v)
(b) (iii) only
(c) (ii) only
(d) (ii) and (v)
9. Formation of photochemical smog takes place in
(a) winter during day time
(b) summer during morning time
(c) summer during day time
(d) winter during morning time
10. B.O.D. test or biochemical oxygen demand test is made for measuring
(a) air pollution
(b) water pollution
(c) noise pollution
(d) soil pollution
11. The smog is essentially caused by the presence of
(a) Oxides of sulphur and nitrogen
(b) O
2
 and N
2
(c) O
2
 and O
3
(d) O
3
 and N
2
12. Ozone layer of stratosphere requires protection from indiscriminate use
of
(a) balloons
(b) pesticides
(c) atomic explosions
(d) aerosols and high flying jets
13. Identify the incorrect statement from the following :
(a) Ozone absorbs the intense ultraviolet radiation of the sun.
(b) Depletion of ozone layer is because of its chemical reactions with
chlorofluoro alkanes.
(c) Ozone absorbs infrared radiation.
(d) Oxides of nitrogen in the atmosphere can cause the depletion of ozone
layer.
14. Which of the following statements about polar stratosphere clouds
(PSCs) is not correct?
(a) PSCs do not react with chlorine nitrate and HCl
(b) Type I clouds are formed at about –77ºC and contain solid HNO
3
 . 3H
2
O
(c) Type II clouds are formed at about –85ºC and contain some ice
(d) A tight whirlpool of wind called Polar Vortex is formed which
surrounds Antarctica
15. Which of the following practices will not come under green chemistry?
(a) If possible, making use of soap made of vegetable oils instead of using
synthetic detergents.
(b) Using H
2
O
2
 for bleaching purpose instead of using chlorine based
bleaching agents
(c) Using bicycles for travelling small distances instead of using petrol/
diesel based vehicles
(d) Using plastic cans for neatly storing substances
16. Phosphate fertilizers when added to water leads to
(a) increased growth of decomposers
(b) reduced algal growth
Page 5


1. High concentration of which of the following in atmosphere leads to
stiffness of flower buds which eventually fall off from plants?
(a) NO
2
(b) SO
2
(c) CFC
(d) Smog
2. Green house gases
(a) allow shorter wavelength to enter earth’s atmosphere while doesn’t
allow longer wavelength to leave the earth’s atmosphere.
(b) allow longer wavelength to enter earth atmosphere while doesn’t allow
shorter wavelength to leave the surface
(c) don’t have wavelength specific character.
(d) show wavelength specific behaviour near the earth while far from earth
these have wavelength independent behaviour.
3. Soil is polluted by
I. pesticides
II. synthetic fertilizers
III. green manure
Choose the correct option.
(a) I and III
(b) I and II
(c) II and III
(d) I, II and III
4. Water is often treated with chlorine to
(a) remove hardness
(b) increase oxygen content
(c) kill germs
(d) remove suspended particles
5. Which of the following is/are the hazardous pollutant(s) present in
automobile exhaust gases?  
(i) N
2
(ii) CO
(iii) CH
4
(iv) Oxides of nitrogen
(a) (ii) and (iii)
(b) (i) and (ii)
(c) (ii) and (iv)
(d) (i) and (iii)
6. “Reducing potentially hazardous waste through smarter production”.
This represents a great step forward for
(a) green revolution
(b) green chemistry
(c) industrial revolution
(d) green biotechnology
7. When rain is accompanied by a thunderstorm, the collected rain water
will have a pH value
(a) slightly lower than that of rain water without thunderstorm
(b) slightly higher than that when the thunderstorm is not there
(c) uninfluenced by occurrence of thunderstorm
(d) which depends upon the amount of dust in air
8. The irritant red haze in the traffic and congested places is due to
presence of  which of the following ?
(i) Oxides of sulphur
(ii) Oxides of nitrogen
(iii) Carbon dioxide
(iv) Mists, smoke and dust
(v) Smog
(a) (i), (iv) and (v)
(b) (iii) only
(c) (ii) only
(d) (ii) and (v)
9. Formation of photochemical smog takes place in
(a) winter during day time
(b) summer during morning time
(c) summer during day time
(d) winter during morning time
10. B.O.D. test or biochemical oxygen demand test is made for measuring
(a) air pollution
(b) water pollution
(c) noise pollution
(d) soil pollution
11. The smog is essentially caused by the presence of
(a) Oxides of sulphur and nitrogen
(b) O
2
 and N
2
(c) O
2
 and O
3
(d) O
3
 and N
2
12. Ozone layer of stratosphere requires protection from indiscriminate use
of
(a) balloons
(b) pesticides
(c) atomic explosions
(d) aerosols and high flying jets
13. Identify the incorrect statement from the following :
(a) Ozone absorbs the intense ultraviolet radiation of the sun.
(b) Depletion of ozone layer is because of its chemical reactions with
chlorofluoro alkanes.
(c) Ozone absorbs infrared radiation.
(d) Oxides of nitrogen in the atmosphere can cause the depletion of ozone
layer.
14. Which of the following statements about polar stratosphere clouds
(PSCs) is not correct?
(a) PSCs do not react with chlorine nitrate and HCl
(b) Type I clouds are formed at about –77ºC and contain solid HNO
3
 . 3H
2
O
(c) Type II clouds are formed at about –85ºC and contain some ice
(d) A tight whirlpool of wind called Polar Vortex is formed which
surrounds Antarctica
15. Which of the following practices will not come under green chemistry?
(a) If possible, making use of soap made of vegetable oils instead of using
synthetic detergents.
(b) Using H
2
O
2
 for bleaching purpose instead of using chlorine based
bleaching agents
(c) Using bicycles for travelling small distances instead of using petrol/
diesel based vehicles
(d) Using plastic cans for neatly storing substances
16. Phosphate fertilizers when added to water leads to
(a) increased growth of decomposers
(b) reduced algal growth
(c) increased algal growth
(d) nutrient enrichment (eutrophication)
17. Roasting of sulphides give the gas X as a by product. This is colorless
gas with choking smell of burnt sulphur and caused great damage to
respiratory organs as a result of acid rain. Its aqueous solution is acidic,
acts as a reducing agent and its acid has never been isolated. The gas X
is :
(a) SO
2
(b) CO
2
(c) SO
3
(d) H
2
S
18. Sewage water is purified by
(a) aquatic plants
(b) micro-oganisms
(c) light
(d) fishes
19. Carbon monoxide (CO) is harmful to man because
(a) it forms carbolic acid
(b) it generates excess CO
2
(c) it is carcinogenic
(d) it competes with O
2
 for haemoglobin
20. Which one of the following statements is not true?
(a) Dissolved oxygen (DO) in cold water can reach a concentration upto 10
ppm.
(b) Clean water would have a BOD value of 5 ppm.
(c) Fluoride deficiency in drinking water is harmful. Soluble fluoride is
often used to bring its concentration upto 1 ppm.
(d) When the pH of rain water is higher than 6.5, it is called acid rain.
21. Which of the following is not a common component of photochemical