1. Which of the following is an indicator of air pollution? ( UPPSC PYQ 2021)
a) Puffballs
b) Algae
c) Lichen
d) Moss
Answer. c) Lichen is not found in air-polluted areas. So, Lichen is an indicator of air pollution.
.
2. "The Ringelmann Scale" is used to measure the density of? ( UPPSC PYQ 2021)
a) Smoke
b) Polluted water
c) Fog
d) Noise
Answer. a) Smoke
.
3. Which one of the following gases is used in the manufacturing of Polythene? ( UPPSC PYQ)
a) Ethylene
b) Carbon dioxide
c) Nitrogen
d) Carbon monoxide
Answer. a) Ethylene gases are used in the manufacturing of Polythene.
4. Biological magnification in a food chain is caused by ( UPPSC PYQ)
a) Pesticides
b) Fertilizers
c) Fluorocarbons
d) Sulfur dioxide
Answer. a) Pesticides
.
5. Dry ice is ( UPPSC PYQ)
a) Solid ammonia
b) Solid Sulphur dioxide
c) Solid carbon dioxide
d) Solid nitrogen
Answer. c) Solid carbon dioxide is also known as Dry ice.
.
6. Which one of the following pairs is NOT correctly matched ( UPPSC PYQ)
a) Freon: Refrigeration
b) Iodoform: Antiseptic
c) Tri-Nitroglycerine: Explosive
d) Teflon: Gelatin
Answer. d) Teflon: Gelatin; Teflon is Polytetrafluoroethylene or fluoropolymer; commonly used in nonstick coating for cookware.
7. BOD ( Biological Oxygen Demand) is a measure of - ( UPPSC PYQ)
a) Organic matter in water
b) Pathogens present in water
c) Inorganic matter in water
d) Oxygen present in water
Answer. d) Oxygen present in water;
.
8. Which of the following polymers is a biodegradable polymer? ( UPPSC PYQ)
a) Neoprene
b) Nylon 2-Nylon 6
c) Nylon 6, 6
d) Nylon 6
Answer. b) Nylon 2-Nylon 6 is a biodegradable polymer.
.
9. Which of the following is called "Dry ice"?
a) Anhydrous ice
b) Solid hydrogen peroxide
c) Solid water
d) Solid carbon dioxide
Answer. d) Solid carbon dioxide
10. Dry ice in chemical form is
a) Anhydrous ice
b) Solid hydrogen peroxide
c) Solid water
d) Solid carbon dioxide
Answer. d) Solid carbon dioxide
11. The process used for transforming salty water into pure water is called
a) Deliquescence
b) Efflorescence
c) Electric Separation
d) Reverse Osmosis
Answer. d) Reverse Osmosis;
.
12. Methane gas-producing field is
a) Wheatfield
b) Paddy field
c) Cotton field
d) Groundnut field
Answer. b) Paddy field
13. CNG used in automobiles to check pollution mainly consists of
a) CH4
b) CO2
c) N2
d) H3
Answer. a) CH4
14. Which one of the following forms an irreversible complex with hemoglobin in the blood?
a) Carbon dioxide
b) Pure Nitrogen gas
c) Carbon Monoxide
d) A mixture of Carbon Dioxide and Helium
Answer. c) Carbon Monoxide
15. Smokescreen is used in warfare for the purpose of concealment and camouflage. Smoke screens generally consist of fine particles of
a) Sodium Chloride
b) Silver Iodide
c) Titanium Oxide
d) Magnesium Oxide
Answer. c) Titanium Oxide;
.
16. Which of the following pairs is correctly matched?
a) Sulfur Dioxide: Teeth
b) Fluoride Pollution: Bhopal Gas Tragedy
c) Methyl Isocyanate: Acid rain
d) Ozone Depletion: Skin Cancer
Answer. d) Ozone Depletion: Skin Cancer
17. Which one of the following pairs is correctly matched? ( UPPSC PYQ)
a) Biodegradable waste- Chlorofluorocarbon
b) Ozone Depletion- Protection from UV rays
c) Ecosystem- Solar energy
d) Biodegradable -Polythene
Answer. c) Ecosystem- Solar energy
18. What is PH value of pure water? ( UPPSC PYQ)
a) 7.0
b) 6.0
c) 8.0
d) 9.0
Answer. a) 7.0
19. The test to determine the residual free-chlorine in water is ( UPPSC PYQ)
a) Schick test
b) Catalase test
c) Oxidase test
d) Ortho-toluidine test
Answer. d) Ortho-toluidine test is used to determine the residual free-chlorine in water.
.
20. Which gas is responsible for global warming? ( UPPSC PYQ)
a) Carbon monoxide
b) Carbon dioxide
c) Nitrous oxide
d) Sulfur dioxide
Answer. b) Carbon dioxide;
.
21. Bagassosis is due to inhalation of ( UPPSC PYQ)
a) Cotton dust
b) Sugarcane dust
c) Silica dust
d) Coal dust
Answer. b) Sugarcane dust;
.
22. Which equipment is used for the calculation of the amount of bleaching powder needed for the purification of water? ( UPPSC PYQ)
a) Pasteur Chamberland filter
b) Berekefeld filter
c) Horrock's apparatus
d) Katadyn filter
Answer. c) Horrock's apparatus;
.
23. The chief source of Hydrogen Sulphide pollutants is ( UPPSC PYQ)
a) Decaying vegetation and animal matter
b) Automobiles
c) Oil Refineries
d) Thermal Power Plants
Answer. a) Decaying vegetation and animal matter;
.
24. Consider the following:
1. Atrazine
2. Butachlor
3. Paraquat
4. Alachlor
Which of the above is/are used as weedicides?
a) only 1
b) only 1 and 2
c) only 2 and 3
d) All of the above
Answer. d) All of the above;
.
25. Which one of the following pairs is not correctly matched?
a) Dry Ice: Solid Carbon Dioxide
b) Sevin: Pesticide
c) Teflon: Fluorinated Polymers
d) Fullerene: Fluorinated Organic Compounds
Answer. d) Fullerene: Fluorinated Organic Compounds;
.
26. Which of the following is an example of non-point source pollution?
a) A factory discharging chemicals into a river
b) An oil spill from a tanker
c) Runoff from agricultural field
d) A sewage treatment plant releasing treated water into a river
Answer. c) Runoff from agricultural field
27.
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