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Question Bank No: 1

1. Choose the wrong statements:
1. ${CO}_{2}$ is responsible for greenhouse effect
11. ${CO}_{2}$ can absorb infrared red radiations but does not allow them to pass through
111.NO is more harmful that ${NO}_{2}$
1V.Acid rain contains mainly ${HNO}_{3}$

a)		only IV
b)		1 and 111
c)		111 and 1V
d)		1, 1V and 11

2. High concentration of fluoride is poisnous and harmful to bones and teeth at levels above

a)		1 ppm
b)		3 ppm
c)		5 ppm
d)		10 ppm

3. The smog is essentialy caused by the presence of

a)		$O_{2}$ and $O_{3}$
b)		$O_{2}$ and $N_{2}$
c)		Oxides of Sulphur and nitrogen
d)		$O_{3}$ and $N_{2}$

4. Ozone in the atratosphere gets depleted by

a)		${CF}_{2} {Cl}_{2}$
b)		$C_{7} F_{16}$
c)		$C_{6} H_{6} {Cl}_{6}$
d)		$C_{6} F_{6}$

5. Which of teh following is not a chemical pollutant?

a)		Solid waste
b)		Noise
c)		Insecticides
d)		Liquid waste

6. Which of the following substance is not present in acid rain?

a)		Sulphuric acid
b)		Nitric acid
c)		Sulphurous acid
d)		Acetic acid

7. Ozone layer of upper atmosphere is being destroyed by

a)		Chloroflurocarbons
b)		${SO}_{2}$
c)		Photochemical oxidants/ $O_{2}$ and ${CO}_{2}$
d)		Smog

8. Carbondioxide content in atmosphere is

a)		0.0034%
b)		0.034%
c)		0.34%
d)		3.4%

9. Maximum desirable concentration of fluorides according to international standards is

a)		10-100 ppm
b)		1 ppm
c)		100-200 ppm
d)		10-20 ppm

10. Air pollution is not caused by

a)		Pollen grains
b)		Hydroelectric power
c)		Industries
d)		Automobiles

11. Eutrophication is process which involves

a)		Depletion of ozone layer
b)		increase in the concentration of ozone in water
c)		decrease in the conc of dissolved oxygen in water by algue
d)		decrease in the level of ${SO}_{2}$ in air

12. The agricultural field that produces maximum methane gas into atmosphere is

a)		Wheat field
b)		Paddy field
c)		Cotton field
d)		Groundnut field

13. Acid rain is caused due to increase in the concentration of ...... in the atmosphere

a)		Ozone and dust
b)		${CO}_{2}$ and CO
c)		${SO}_{2}$ and CO
d)		${SO}_{2}$ and ${NO}_{2}$

14. U.N. radiation from the sun causes a reaction in the atmosphere that leads to production of

a)		Fluorides
b)		Carbon monoxide
c)		Sulphur dioxide
d)		Ozone

15. Which of the following reacts with hemoglobin of blood and produce toxic effect.

a)		Carbon dioxide
b)		Carbon monoxide
c)		Oxygen
d)		Carbon suboxide

16. Environmental pollution affects

a)		Biotic components
b)		Plants only
c)		Humans only
d)		Both biotic and abiotic components of environment

17. Photochemical smog always contains

a)		$O_{3}$
b)		CO
c)		${CO}_{2}$
d)		${CH}_{4}$

18. As it passes into food chain, the concentration of DDT

a)		Remains same
b)		Decreases
c)		Increases
d)		Unpredictable

19. Eutrophication causes reduction in

a)		Dissolved hydrogen
b)		Dissolved oxygen
c)		Dissolved salts
d)		All the above

20. Water pollution is mainly due to

a)		Sulphur dioxide
b)		Carbon dioxide
c)		Oxygen
d)		Industrial discharges

21. Biodegradable pollutant is

a)		Plastic
b)		Asbestos
c)		Sewage
d)		Mercury

22. Taj Mahal is threatened by pollution from

a)		Chlorine
b)		Sulphur dioxide
c)		Hydrogen
d)		Oxygen

23. Drained sewage has B.O.D

a)		More than that of water
b)		Less than that of water
c)		Equal to that of water
d)		None of the above

24. Drawback of DDT as pesticide is

a)		It becomes ineffective after some time
b)		It is less effective than others
c)		It is not easily/radpidly degraded in nature
d)		Its high cost

25. Carbon monoxide is harmful to human beings as it

a)		is carcinogenic
b)		is antagonistic to ${CO}_{2}$
c)		Has higher affinity for haemoglobin as compared to oxygen
d)		Is destructive to $O_{3}$

26. For which of the following reaction $K_{p} = K_{c} ?$

a)		$N_{2} (g) + O_{2} (g) \underset{}{⇌}$ 2N $H_{3}$ (g)
b)		2NOCl(g) $\underset{}{⇌} 2 NO (g) + {Cl}_{2} (g)$
c)		$H_{2} (g) + I_{2} (s) \underset{}{⇌} 2 HI (g)$
d)		$H_{2} (g) + {Cl}_{2} (g) \underset{}{⇌} 2 HCl (g)$

27. The factor which changes equilibrium constant of the reaction $A_{2} (g) + B_{2} (g) \to 2 AB (g)$ is

a)		total pressure
b)		amounts of $A_{2}$ and $B_{2}$
c)		temperature
d)		catalyst

28. In which of the following cases, the reaction goes farthest to completion

a)		K= $10^{3}$
b)		K= $10^{- 2}$
c)		K=10
d)		K= $10^{0}$

29. For the manufacture of ammonia by the reaction $N_{2} + 3 H_{2} \overset{}{⇌} 2 N H_{3} + 21.9 kcal$ the favourable conditions are

a)		low temperature, low pressure and catalyst
b)		low temperature, high pressure and catalyst
c)		high temperature, low pressure and catalyst
d)		high temperature, high pressure and catalyst

30. Bio-degradable pollutant is

a)		domestic waste
b)		DDT
c)		Mercury salt
d)		aluminium foil

31. Result of ozone hole is

a)		green house effect
b)		global warming
c)		acid rain
d)		UV rays reach the earth

32. Photochemical smog is caused by

a)		CO
b)		C $O_{2}$
c)		$O_{3}$
d)		N $O_{2}$

33. Methane gas producing field is

a)		wheat field
b)		paddy field
c)		cotton field
d)		groundnut field

34. Water is often treated with chlorine to

a)		increase oxygen content
b)		kill germs
c)		remove hardness
d)		remove suspended particles

35. DDT is

a)		biodegradable pollutant
b)		nondegradable pollutant
c)		not a pollutant
d)		an antibiotic

36. Depletion of ozone layer is due to

a)		oxides of nitrogen
b)		oxides of carbon
c)		oxides of sulphur
d)		none of the above

37. Most hazardous metal pollutant of automobile exhaust is

a)		mercury
b)		lead
c)		cadmium
d)		copper

38. Ozone hole refers to

a)		hole in ozone layers
b)		reduction in thickness of ozone layer in stratosphere
c)		reduction of thickness of ozone in troposphere
d)		increase concentration of ozone

39. Phosphate pollution is caused by

a)		weathering of phosphate rocks only
b)		agricultural fertilizers
c)		phosphate rocks and sewage
d)		sewage and agricultural fertilizers

40. Increasing skin cancer and high mutation rate are due to

a)		acid rain
b)		ozone depletion
c)		CO pollution
d)		C $O_{2}$ pollution

41. Measurement of rate of oxygen utilisation by a unit volume of water over a period of tine is to measure

a)		fermentation
b)		biogas generation
c)		biosynthethic pathway
d)		biological oxygen demand

42. One of the oxidants used with liquid propellants is

a)		pencillinammonium perchlorate
b)		nitrocellulose
c)		sulphuric acid
d)		dinitrogen tetroxide ( $N_{2} O_{4})$

43. Amoxillin is semi-synthetic modification of

a)		pencillin
b)		streptomycin
c)		tetracycline
d)		chloramphenicol

44. Which of the following is an antidiabatic drug?

a)		Insulin
b)		penicillin
c)		chloroquine
d)		aspirin

45. Which of the following is a basic dye?

a)		alizarin
b)		phthalein dye
c)		aniline yellow
d)		orange I

46. Acetoxybenzoic acid is

a)		antiseptic
b)		aspirin
c)		antibiotic
d)		mordant dye

47. Which of the following can possibly be used as analgesic without causing addiction and any modification?

a)		Morphine
b)		N-acetylparaaminophenol
c)		diazepam
d)		tetrahydrocatenol

48. Which of the following is an acid dye?

a)		orange-I
b)		phenolphthalein
c)		malachite green
d)		methylene blue

49. Arsenic drugs are mainly used in the treatment of

a)		jaundice
b)		typhoid
c)		syphilis
d)		cholera

50. Detergents are prepared by the action of $H_{2} S O_{4}$ followed by neutrilization by starting with

a)		cholestrol
b)		lauryl alcohol
c)		cyclohexanol
d)		p-nitophenol