WBCS MAIN 2022 P-4 Science-Technology & EVS MCQ
WBCS MAIN 2022 P-4 Science-Technology & EVS One Liner
Topic 1: Physics
1. Which law is the hydraulic press based on?
Ans: Pascal’s law
2. When is current in a circuit wattless?
Ans: When phase difference between current and voltage is π/2
3. Why does a bicycle in motion not fall?
Ans: Due to conservation of angular momentum
4. What does polarization of light prove?
Ans: Transverse nature of light
5. What is the contact angle of mercury with respect to glass?
Ans: >90°
6. What does RADAR stand for?
Ans: Radio Detection and Ranging
7. To which sound frequencies is the human ear most sensitive?
Ans: 500 – 5000 Hz
8. What causes the blueness of the sky?
Ans: Scattering of sunlight by air molecules
9. Which pressure gauge is used for measuring high pressure of the order of 10⁵ psi?
Ans: Bourdon pressure gauge
10. Why does increasing carbon dioxide raise atmospheric temperature?
Ans: Because it absorbs the infrared part of solar radiation
11. When does a light emitting diode produce light?
Ans: When forward biased
12. How does electrical resistivity of a conductor change with temperature?
Ans: Increases with temperature
13. What is the relationship between Pressure (P) and Volume (V) for adiabatic expansion?
Ans: PV^γ = constant
14. What is the velocity profile of a liquid flowing through a capillary?
Ans: Parabolic
15. Which superconducting material has the highest critical temperature and critical magnetic flux density?
Ans: YBa₂Cu₃O₇
16. Which material is successfully used as an induction core?
Ans: Ni-Zn ferrite
17. What is a Zener diode used as?
Ans: Voltage regulator
18. What is the ratio of specific heats (γ) for a diatomic gas?
Ans: 1.40
Topic 2: Chemistry
19. Which one is NOT normally considered a pollutant?
Ans: Carbon dioxide
20. Which is NOT a naturally-occurring hazardous element?
Ans: Phthalate
21. Which metal is powdered, suspended in oil, and used as paint?
Ans: Aluminium (Al)
22. DDT and bleaching powder are compounds of which element?
Ans: Chlorine
23. Which enzyme is used to produce citric acid from crude sugar by aerobic fermentation?
Ans: Aspergillus niger
24. Why is minor gypsum added to cement clinker during grinding?
Ans: To reduce plasticity and quick setting of cement paste
25. What is oil of winter green?
Ans: Methyl Salicylate
26. Which oxidizing agent is used in green chemistry for clean oxidation?
Ans: Aqueous H₂O₂
27. What is known as inorganic graphite?
Ans: (BN)₃
28. What is a thick paste of cement, sand, stone chips and water called?
Ans: Concrete
29. What is zone refining used for?
Ans: Ultra purification of Si, Ge, Ga (All of the above)
30. What is NOT a characteristic of metallic bond?
Ans: Directionality
31. Brass is an alloy of which metals?
Ans: Copper and Zinc (Cu & Zn)
32. What is 2.0% solution of mercurochrome used as?
Ans: Strong antiseptic
33. Which of the following functions as a primary standard?
Ans: K₂Cr₂O₇
34. Why is Al powder used in thermit welding?
Ans: Due to its greater affinity for O₂
35. What does PVC stand for in the plastic industry?
Ans: Poly Vinyl Chloride
36. Which of the following is a polysaccharide?
Ans: Starch
37. What does a catalyst change in a chemical reaction?
Ans: Activation energy of the reaction
38. Which one of the following is NOT a colloid?
Ans: Urea
39. Which is widely used as flavors in food and perfumery?
Ans: Vanillin
40. In N-type semiconductor, ultrapure Si is doped with which element?
Ans: Phosphorous
41. Ultramarine blue pigment contains which element?
Ans: Sulphur
42. What type of bond is present in tungsten carbide?
Ans: Covalent
43. Which statement about detergent is incorrect?
Ans: Detergent is fully biodegradable
44. What material is used as a fuel rod in a nuclear reactor?
Ans: UO₂
45. LED and LASER diodes are made of which material?
Ans: GaAs
46. Which of the following is a double salt?
Ans: K₂SO₄·Al₂(SO₄)₃·24H₂O
47. What is D.D.T. classified as?
Ans: A non-degradable pollutant
48. Which metal is extracted from bauxite ore using Bayer’s process?
Ans: Aluminium (Al)
49. Which metal is protected by passivation?
Ans: Stainless Steel
50. How can CO level up to 10 ppm in exhaust gas be monitored?
Ans: Non-dispersive IR spectroscopy
Topic 3: Biology
51. What is the study of inter-relationships between organisms and their environment?
Ans: Ecology
52. What are closely related, morphologically similar, sympatric but reproductively isolated populations called?
Ans: Sibling species
53. What term describes the complete set of chemical reactions within cells?
Ans: Metabolism
54. What does an endocrinologist study?
Ans: Glands
55. If a microorganism is single-celled and lacks organelles, what can be concluded?
Ans: The cell is prokaryotic
56. Bacteria that feed on decaying organic matter are described as?
Ans: Heterotrophic
57. Which is an anticancer drug?
Ans: Camptothecin
58. Which disease is caused by consuming polished rice?
Ans: Beriberi
59. Why does applying FeCl₃ solution stop bleeding?
Ans: Blood is coagulated and seals the blood vessel
60. What causes Alzheimer’s disease?
Ans: Interaction of Al with internal organs
61. Which is an endobiotic fungus?
Ans: Synchytrium
62. A diet high in saturated fats can lead to which disorder?
Ans: Cardiovascular diseases
63. How is the pH of human blood (around 7) maintained?
Ans: By buffering action of H₂CO₃ and NaHCO₃
64. During cell division, when does DNA synthesis occur?
Ans: Interphase
65. Antibiotic resistance in organisms results from which process?
Ans: Evolution
66. What is myoglobin?
Ans: A monomer
67. What is I¹³¹ used for?
Ans: Thyroid therapy
68. Which are oxygen-binding proteins in the body?
Ans: All of the above (Hemoglobin, Myoglobin, Hemerythrin)
69. Which vitamin acts as a cholesterol-lowering agent in blood?
Ans: Vitamin E
70. Reuse of disposed needles and syringes may cause which infection?
Ans: HIV
71. How much air does a man normally inhale in a day?
Ans: 16 kg
Topic 4: Environmental Science & Pollution
72. Why will skin-related disorders become more common in coming years?
Ans: Due to depletion of the ozone layer
73. What type of pollution is cultural eutrophication?
Ans: Water pollution
74. What would most directly prevent a dead zone from forming in a eutrophic water body?
Ans: Lower the nutrient levels
75. Which of the following would be described as anthropogenic?
Ans: Logging a forest
76. Which solid waste disposal method is ecologically most acceptable?
Ans: Composting
77. Which is NOT a predicted consequence of global climate change?
Ans: All of the above are predicted consequences
78. Which protocol deals with phasing out ozone-depleting substances?
Ans: Montreal Protocol
79. What is the primary cause of ocean acidification?
Ans: Atmospheric CO₂ dissolving in ocean water
80. What causes phosphate pollution?
Ans: Sewage and agricultural fertilizers
81. Which of the following is a secondary pollutant?
Ans: PAN (Peroxyacetyl Nitrate)
82. What does a pyramid of numbers represent?
Ans: Number of individuals in a trophic level
83. Which is an example of an emerging disease?
Ans: Ebola
84. What is the use of organisms to control pests called?
Ans: Biological control
85. In which protected areas are local people NOT allowed to collect biomass?
Ans: National Parks
86. At what rate is Earth’s temperature increasing per year due to the greenhouse effect?
Ans: 0.05°C
87. What process produces drinking water in areas with no freshwater?
Ans: Desalination
88. What type of noise can be reduced by lining walls and ceilings with sound-absorbing material?
Ans: Reflection noise
89. Which animals in Minamata Bay remained free from Minamata disease?
Ans: Rabbits
90. What is the study of the distribution of world’s species called?
Ans: Biogeography
91. Which process removes nitrates from water by converting them to nitrogen gas?
Ans: Denitrification
92. What causes the ozone hole in the Antarctic region?
Ans: Presence of polar front, stratospheric clouds, and inflow of CFCs
93. To avoid biomagnification of toxins, which organism should be avoided eating?
Ans: Tena (tertiary consumer)
94. Which is NOT a site for in-situ conservation of flora?
Ans: Botanical Garden
95. Which is a biodiversity hotspot in India?
Ans: Western Ghats
96. What causes acid rain?
Ans: Excess NO₂ and SO₂ from burning fossil fuels
97. What does ultraviolet radiation from sunlight produce?
Ans: Ozone
98. What is the equal sharing of Earth’s resources known as?
Ans: Environmental equity
99. Which chemicals destroy the stratospheric ozone layer?
Ans: CFCs
100. What is NOT a major cause of biodiversity loss?
Ans: Zoonotic diseases
101. What is observed in wastewater after primary treatment?
Ans: Many suspended solids have been removed
102. Why is carbon monoxide a pollutant?
Ans: It reacts with hemoglobin
103. What is a special property of water?
Ans: It is good at dissolving other substances
104. How do supersonic jets cause pollution?
Ans: By thinning the O₃ layer
105. What properties does supercritical CO₂ have?
Ans: Midway between liquid and gas
106. Which symbiosis benefits one member without harming the other?
Ans: Commensalism
107. What practice improves soil fertility and breaks pest cycles naturally?
Ans: Crop rotation
108. Which organism is absent in polluted water?
Ans: Larva of stone fly
109. What type of growth occurs with unlimited resources?
Ans: Exponential growth
110. What causes damage to relative biological effectiveness?
Ans: Radiation
111. Which is the most common indicator organism for polluted water?
Ans: E. coli
112. Which food chain involves microorganisms breaking down organic matter?
Ans: Detritus food chain
113. What is the best pH range for soil cultivation?
Ans: 5.5 – 6.5
114. What is the huge solid waste from Iron and Steel industry called?
Ans: Granulated slag
115. What is the major aerosol pollutant in jet plane emissions?
Ans: Fluorocarbon
116. What is the process of rapid cooling in metallurgy called?
Ans: Quenching
117. Which is the most hazardous metal pollutant in automobile exhausts?
Ans: Lead
118. Which gas was released during the Bhopal tragedy?
Ans: Methyl isocyanate
119. The presence of nitrogen in wastewater is due to alteration of which substance?
Ans: Protein
120. What causes photochemical smog?
Ans: Reaction among NO₂, O₃ and peroxyacetyl nitrate in sunlight
121. What is most likely found in a biodiversity hotspot?
Ans: A large number of endemic species
122. What does “Effective dose-50%” describe?
Ans: The dose that results in a significant response in 50% of subjects
123. What causes the greenhouse effect?
Ans: Increase in temperature due to increased CO₂ concentration
124. What disease is caused by eating fish contaminated with mercury?
Ans: Minamata disease
125. What is B.O.D.?
Ans: The amount of O₂ utilized by microorganisms for decomposition
126. When was the first environmental conference (Stockholm Conference) held?
Ans: 1972
127. What is carbon credit?
Ans: The difference between allowed carbon emission and actual emitted carbon
128. How are coal, oil, and natural gas formed?
Ans: Over millions of years from algae and plants
129. How does carbon monoxide prevent oxygen transport in the body?
Ans: By forming a stable compound with hemoglobin
130. What would happen to Earth’s temperature without CO₂?
Ans: It would be less than the present
131. What does the upper part of the sea aquatic ecosystem contain?
Ans: Plankton and neuston
132. What is the optimum temperature for sludge digestion?
Ans: 37°C
TOPIC-WISE SUMMARY
| Topic No. | Topic Name | Question Numbers |
|---|---|---|
| 1 | Physics | 1-18 |
| 2 | Chemistry | 19-50 |
| 3 | Biology | 51-71 |
| 4 | Environmental Science & Pollution | 72-132 |
WBCS MAIN 2022 P-4 Science-Technology & EVS MCQ
SECTION A: SCIENCE, TECHNOLOGY & EVS
Topic 1: Physics
1. Hydraulic press is based on
A. Archimedes’ Law
B. Pascal’s law
C. Reynold’s law
D. Bernoulis’ law
Correct Answer: B. Pascal’s law
2. Current in a circuit is wattless when phase difference between current and voltage is
A. 0°
B. π/2
C. π
D. -π
Correct Answer: B. π/2
3. A bicycle in motion does not fall because one of the following is conserved.
A. Linear momentum
B. Angular momentum
C. Kinetic energy
D. All of the above
Correct Answer: B. Angular momentum
4. Polarisation of light proves the
A. longitudinal nature of light
B. transverse nature of light
C. corpuscular nature of light
D. photoelectric effect
Correct Answer: B. transverse nature of light
5. Contact angle of mercury with respect to glass is
A. 0°
B. 90°
C. < 90° D. >90°
Correct Answer: D. >90°
6. ‘RADAR’ stands for
A. Radio Detection and Ranging
B. Ready Advanced Appliance for Ranging
C. Range Detection Appliance for Airplane Ranging
D. Ready Advanced Airplane Ranging
Correct Answer: A. Radio Detection and Ranging
7. Human ear is most sensitive to the sound of frequencies in between
A. 100 – 500 Hz
B. 500 – 5000 Hz
C. 5000 – 10000 Hz
D. 10000 – 20000 Hz
Correct Answer: B. 500 – 5000 Hz
8. The blueness of the sky is mainly due to
A. the scattering of sunlight by air molecules
B. the presence of water vapor
C. absorption of blue light by the air
D. emission of blue light by the atmosphere
Correct Answer: A. the scattering of sunlight by air molecules
9. The pressure gauge required for measuring high pressure of the order of 10⁵ psi
A. U-Tube manometer
B. Bourdon pressure gauge
C. Mc Cleod gauge
D. Pirani gauge
Correct Answer: B. Bourdon pressure gauge
10. The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs
A. the water vapour of the air and retains its heat
B. the ultraviolet part of the solar radiation
C. all the solar radiations
D. the infrared part of the solar radiation
Correct Answer: D. the infrared part of the solar radiation
11. A light emitting diode produces light when
A. Forward biased
B. Reverse biased
C. Unbiased
D. None of the above
Correct Answer: A. Forward biased
12. Electrical resistivity of a conductor
A. increases with temperature
B. decreases with temperature
C. does not change with temperature
D. decreases at lower temperature, then increases with temperature
Correct Answer: A. increases with temperature
13. Relationship between Pressure (P) and Volume (V) of gas undergoing adiabatic expansion is (γ is ratio of specific heats at constant pressure and constant volume respectively).
A. PV = constant
B. PV^γ = constant
C. PV^(γ-1) = constant
D. PV^(1/γ) = constant
Correct Answer: B. PV^γ = constant
14. The velocity profile of a liquid flowing through a capillary is
A. Straight line
B. Circular arc
C. Hyperbolic
D. Parabolic
Correct Answer: D. Parabolic
15. Which of the following super conducting material has the highest critical temperature and highest critical magnetic flux density?
A. Lead
B. Nb-Zr alloy
C. Nb₃Ge
D. YBa₂Cu₃O₇
Correct Answer: D. YBa₂Cu₃O₇
16. The material successfully used as induction core is
A. Garnet
B. AlNiCo magnet
C. Ba-Sr ferrite
D. Ni-Zn ferrite
Correct Answer: D. Ni-Zn ferrite
17. Zener diode is used as
A. Coupler
B. Rectifier
C. Amplifier
D. Voltage regulator
Correct Answer: D. Voltage regulator
18. The ratio of specific heats at constant pressure and constant volume for diatomic gas is
A. 1.66
B. 1.40
C. 1.30
D. 1.25
Correct Answer: B. 1.40
Topic 2: Chemistry
19. Which one is not a pollutant normally?
A. Hydrocarbon
B. Carbon dioxide
C. Carbon monoxide
D. Sulphur dioxide
Correct Answer: B. Carbon dioxide
20. Which one of the following is not a naturally-occurring element that may be hazardous to human health?
A. Lead
B. Radon
C. Phthalate
D. Mercury
Correct Answer: C. Phthalate
21. Which metal of the following is powdered, suspended in oil and used as paint?
A. Fe
B. Sn
C. Al
D. Ag
Correct Answer: C. Al
22. DDT and bleaching powder are the compounds of
A. S
B. P
C. Chlorine
D. As
Correct Answer: C. Chlorine
23. Citric acid can be produced from crude sugar by aerobic fermentation using the enzyme:
A. Amylase
B. Lipase
C. Thiobacillus
D. Aspergillus niger
Correct Answer: D. Aspergillus niger
24. Minor gypsum is added to cement clinker during its grinding in order to
A. increase the plasticity of the cement paste
B. decrease the plasticity of the cement paste
C. increase the plasticity and increase initial setting time of the cement paste
D. reduce plasticity and quick setting of cement paste
Correct Answer: D. reduce plasticity and quick setting of cement paste
25. Oil of winter green is
A. Acetic acid
B. Benzoic acid
C. Methyl Salicylate
D. Phthalic acid
Correct Answer: C. Methyl Salicylate
26. Green chemistry uses following oxidising agent for clean oxidation
A. K₂Cr₂O₇
B. NH₄NO₃
C. K₂S₂O₈
D. Aqueous H₂O₂
Correct Answer: D. Aqueous H₂O₂
27. Which of the following is known as inorganic graphite?
A. (BN)₃
B. B₃N₃H₆
C. Si₆
D. Si₃N₄
Correct Answer: A. (BN)₃
28. Thick paste of cement, sand, stone chips and water is
A. Mortar
B. Concrete
C. Reinforced Cement Concrete
D. Monoliths
Correct Answer: B. Concrete
29. The process of zone refining is used for ultra purification of
A. Si
B. Ge
C. Ga
D. All of the above
Correct Answer: D. All of the above
30. Metallic bond is not characterised by
A. Opacity
B. Ductility
C. High conductivity
D. Directionality
Correct Answer: D. Directionality
31. Brass is the alloy of
A. Cu & Zn
B. Cu & Sn
C. Cu & Al
D. Zinc and Tin
Correct Answer: A. Cu & Zn
32. 2.0% solution of mercurochrome is used as
A. Insecticide
B. Fungicide
C. Herbicide
D. Strong antiseptic
Correct Answer: D. Strong antiseptic
33. Which of the following functions as primary standard?
A. KMnO₄
B. K₂Cr₂O₇
C. Sodium Thiosulphate
D. EDTA
Correct Answer: B. K₂Cr₂O₇
34. Thermit welding uses Al powder because of
A. its lightness
B. its lower melting point
C. its greater affinity for O₂
D. All of the above
Correct Answer: C. its greater affinity for O₂
35. The term PVC in the plastic industry stands for
A. Phospho Vinyl Chloride
B. Poly Vinyl Carbonate
C. Poly Vinyl Chloride
D. Phospho Vanadium Chloride
Correct Answer: C. Poly Vinyl Chloride
36. Which of the following is a polysaccharide?
A. Glucose
B. Starch
C. Glycogen
D. Sucrose
Correct Answer: B. Starch
37. In a chemical reaction, catalyst changes
A. Potential energy of the products
B. Potential energy of the reactants
C. Heat of reaction
D. Activation energy of the reaction
Correct Answer: D. Activation energy of the reaction
38. Which one of the following is not colloid?
A. Milk
B. Smoke
C. Blood
D. Urea
Correct Answer: D. Urea
39. Which of the following is widely used as flavors in food and perfumery?
A. Carboxy methyl cellulose
B. Ascorbic acid
C. Saccharin
D. Vanillin
Correct Answer: D. Vanillin
40. In N-type semiconductor, ultrapure Si is doped with
A. Boron
B. Aluminum
C. Phosphorous
D. Indium
Correct Answer: C. Phosphorous
41. Ultramarine blue pigment is a complex alumino-silicate containing
A. Sulphur
B. Phosphorous
C. Boron
D. Cobalt
Correct Answer: A. Sulphur
42. Which type of bond is present in superhard material tungsten carbide?
A. Ionic
B. Covalent
C. Metallic
D. All of the above
Correct Answer: B. Covalent
43. Point out incorrect statement.
A. Detergent works well even with hard water.
B. Detergent does not form any precipitate with hard water.
C. Detergent is easily soluble in water.
D. Detergent is fully biodegradable.
Correct Answer: D. Detergent is fully biodegradable.
44. The material used as fuel rod in nuclear reactor is
A. Graphite
B. UO₂
C. D₂O
D. ZrO₂
Correct Answer: B. UO₂
45. LED and LASER diodes are made of
A. Al
B. Ga
C. As
D. GaAs
Correct Answer: D. GaAs
46. Which of the following is double salt?
A. FeSO₄·6H₂O
B. Pb(OH)NO₃
C. K₂SO₄·Al₂(SO₄)₃·24H₂O
D. K₄[Fe(CN)₆]
Correct Answer: C. K₂SO₄·Al₂(SO₄)₃·24H₂O
47. D.D.T. is
A. not a pollutant
B. an antibiotic
C. a non-degradable pollutant
D. a biodegradable pollutant
Correct Answer: C. a non-degradable pollutant
48. The metal extracted from bauxite ore using Bayer’s process is
A. Al
B. Zn
C. Pb
D. Ba
Correct Answer: A. Al
49. Which of the following is protected by passivation?
A. Mild Steel
B. Silver
C. Bronze
D. Stainless Steel
Correct Answer: D. Stainless Steel
50. CO level in the exhaust gas upto 10 ppm can be monitored by
A. Non dispersive IR spectroscopy
B. Gas chromatography
C. UV-VIS spectroscopy
D. Flame photometry
Correct Answer: A. Non dispersive IR spectroscopy
Topic 3: Biology
51. Study of inter-relationships between organisms and their environment is
A. ecology
B. ecosystem
C. phytogeography
D. ethology
Correct Answer: A. ecology
52. The closely related morphologically similar sympatric populations, but reproductively isolated, are designated as
A. clones
B. sibling species
C. clines
D. demes
Correct Answer: B. sibling species
53. Which one of the following terms describes the complete set of chemical reactions that occur within cells?
A. Metabolism
B. Cellular respiration
C. Calvin cycle
D. Bio energetics
Correct Answer: A. Metabolism
54. An endocrinologist deals with
A. Teeth
B. Glands
C. Epidermis
D. Heart
Correct Answer: B. Glands
55. A micro-organism is viewed through a microscope and is determined to be made of a single cell that lacks organelles. From this information, which one of the following can you conclude?
A. The organism belongs to Domain Bacteria.
B. The organism belongs to Domain Eukarya.
C. The organism belongs to Domain Archaea.
D. The cell is prokaryotic.
Correct Answer: D. The cell is prokaryotic.
56. Bacteria that feed upon decaying organic matter in the soil would best be described as which one of the following?
A. Heterotrophic
B. Autotrophic
C. Fungi
D. Cyanobacteria
Correct Answer: A. Heterotrophic
57. Anticancer drug is
A. Captopril
B. Salicilin
C. Aspirin
D. Camptothecin
Correct Answer: D. Camptothecin
58. Use of polished rice in human diet causes the following disease
A. Night blindness
B. Color blindness
C. Goitre
D. Beriberi
Correct Answer: D. Beriberi
59. Bleeding is stopped by applying FeCl₃ solution because
A. blood starts flowing in opposite direction
B. reacts with blood and forms solid which seals the blood vessels
C. blood is coagulated and seals blood vessel
D. None of the above
Correct Answer: C. blood is coagulated and seals blood vessel
60. Alzheimer’s disease is caused by
A. interaction of Al with internal organs of the body
B. interaction of Cu with internal organs of the body
C. interaction of Ag with internal organs of the body
D. interaction of Sn with internal organs of the body
Correct Answer: A. interaction of Al with internal organs of the body
61. An endobiotic fungus is
A. Agaricus
B. Morchella
C. Synchytrium
D. Polyporus
Correct Answer: C. Synchytrium
62. A diet high in saturated fats can be linked to which of the following disorder
A. Kidney Failure
B. Bulimia
C. Anorexia
D. Cardiovascular diseases
Correct Answer: D. Cardiovascular diseases
63. pH of the blood in human body around 7 is maintained by buffering action of
A. H₂CO₃ and Na₂CO₃
B. H₂CO₃ and NaHCO₃
C. CH₃COOH and CH₃COONa
D. Na₂HPO₄ and NaH₂PO₄
Correct Answer: B. H₂CO₃ and NaHCO₃
64. During cell divisions, DNA synthesis takes place in
A. Interphase
B. Anaphase
C. Prophase
D. Telophase
Correct Answer: A. Interphase
65. Antibiotic resistance in organisms is the result of what process?
A. Differentiation
B. Evolution
C. Emergence
D. Succession
Correct Answer: B. Evolution
66. Myoglobin is
A. Tetramer
B. Dimer
C. Monomer
D. Polymer
Correct Answer: C. Monomer
67. I¹³¹ is used for
A. Cancer therapy
B. Geological dating
C. Thyroid therapy
D. Leukemia therapy
Correct Answer: C. Thyroid therapy
68. Oxygen binding protein in body is
A. Hemoglobin
B. Myoglobin
C. Hemerythrin
D. All of the above
Correct Answer: D. All of the above
69. Cholesterol lowering agent in blood is
A. Vitamin K
B. Vitamin E
C. Vitamin C
D. Vitamin B7
Correct Answer: B. Vitamin E
70. The reuse of disposed needles and syringes may cause infections of
A. HIV
B. T.B.
C. Typhoid
D. Cancer
Correct Answer: A. HIV
71. How much air does a man normally inhale in a day?
A. 5 kg
B. 16 kg
C. 20 kg
D. 25 kg
Correct Answer: B. 16 kg
Topic 4: Environmental Science & Pollution
72. In coming years, skin related disorders will be more common due to
A. water pollution
B. depletion of ozone layer
C. pollutants in air
D. use of detergents
Correct Answer: B. depletion of ozone layer
73. Which one of the following type of pollution is cultural eutrophication?
A. Noise pollution
B. Thermal pollution
C. Soil pollution
D. Water pollution
Correct Answer: D. Water pollution
74. Which one of the following would most directly prevent a dead zone from forming in a water body that is already experiencing eutrophication?
A. Increase the O₂ concentration in the water
B. Lower the nutrient levels
C. Increase the amount of algae and phytoplankton
D. Increase the amount of bacteria that decompose dead organic matter
Correct Answer: B. Lower the nutrient levels
75. Which one of the following would be described as anthropogenic?
A. Water backing up behind a beaver dam
B. The dinosaurs going extinct
C. Logging a forest
D. A mudslide burying a stream
Correct Answer: C. Logging a forest
76. Which of the following solid waste disposal method is ecologically most acceptable?
A. Land fill
B. Incineration
C. Pyrolysis
D. Composting
Correct Answer: D. Composting
77. Which one of the following is not a predicted consequence of global climate change?
A. Spread of diseases carried by insects, such as malaria
B. Rise in sea levels
C. Increases in the global average air and ocean temperatures
D. All of the above
Correct Answer: D. All of the above
78. Which one of the following is associated with the issue of control and phasing out of the use of ozone depleting substances?
A. Bretton Woods Conference
B. Montreal Protocol
C. Kyoto Protocol
D. Nagoya Protocol
Correct Answer: B. Montreal Protocol
79. What is the primary cause of ocean acidification?
A. Atmospheric CO₂ dissolving in ocean water
B. Increases in acid rain
C. Increased erosion of acid-containing rocks
D. Water draining into the ocean has a higher pH from industrial pollutants
Correct Answer: A. Atmospheric CO₂ dissolving in ocean water
80. Phosphate pollution is caused by
A. sewage and phosphate rock
B. sewage and agricultural fertilizers
C. phosphate rock only
D. agricultural fertilizers only
Correct Answer: B. sewage and agricultural fertilizers
81. Which of the following is a secondary pollutant?
A. PAN
B. Aerosol
C. CO
D. CO₂
Correct Answer: A. PAN
82. Pyramid of numbers deals with number of
A. species in an area
B. individuals in a community
C. individuals in a trophic level
D. subspecies in a community
Correct Answer: C. individuals in a trophic level
83. Which one of the following is an example of an emerging disease?
A. Malaria
B. Ebola
C. Cancer
D. Heart disease
Correct Answer: B. Ebola
84. Which one of the following describes the use of organisms to control pests?
A. Bioremediation
B. Biological control
C. Species niche partitioning
D. Vector control
Correct Answer: B. Biological control
85. In which one among the following categories of protected areas in India are local people not allowed to collect and use the biomass?
A. Biosphere Reserves
B. National Parks
C. Wetlands declared under Ramsar Convention
D. Wildlife Sanctuaries
Correct Answer: B. National Parks
86. In what rate the temperature of earth’s atmosphere is increasing per year due to Green house effect?
A. 1°C
B. 0.05°C
C. 0.5°C
D. 0.8°C
Correct Answer: B. 0.05°C
87. For individuals living in areas where no freshwater is available, which one of the following would produce water that could be used for drinking?
A. Desalination
B. Groundwater mining
C. Sublimation
D. Transpiration
Correct Answer: A. Desalination
88. What type of noise can be abated by providing lining on walls and ceiling with sound absorbing material?
A. Source noise
B. Air borne noise
C. Structural noise
D. Reflection noise
Correct Answer: D. Reflection noise
89. In Minamata Bay Japan the animals which remained free from Minamata disease, are
A. dogs
B. cats
C. pigs
D. rabbits
Correct Answer: D. rabbits
90. The study of the distribution of the world’s species both in the past and in the present is known by what term?
A. Geology
B. Biogeography
C. Biodiversity
D. Biogeomorphology
Correct Answer: B. Biogeography
91. Which one of the following processes would remove nitrates from contaminated water by converting it into nitrogen gas?
A. Nitrification
B. Nitrogen fixation
C. Denitrification
D. Assimilation
Correct Answer: C. Denitrification
92. The formation of ozone hole in the Antarctic region has been a cause of concern. What could be the reason for the formation of this hole?
A. Presence of prominent tropospheric turbulence; and inflow of CFCs.
B. Presence of prominent polar front and stratospheric clouds; and inflow of CFCs.
C. Absence of polar front and stratospheric clouds; and inflow of methane and CFCs.
D. Increased temperature at polar region due to global warming.
Correct Answer: B. Presence of prominent polar front and stratospheric clouds; and inflow of CFCs.
93. If you are concerned about biomagnification of toxins, which one of the following would you most want to avoid eating?
A. Tena (tertiary consumer)
B. Seaweed (producer)
C. Urchin (primary consumer)
D. Sculpin (secondary consumer)
Correct Answer: A. Tena (tertiary consumer)
94. Which one of the following is not a site for in-situ method of conservation of flora?
A. Biosphere Reserves
B. Botanical Garden
C. National Park
D. Wildlife Sanctuary
Correct Answer: B. Botanical Garden
95. Which one of the following is a biodiversity hotspot in India?
A. Western Ghats
B. Nandadevi
C. Eastern Ghats
D. Aravalli
Correct Answer: A. Western Ghats
96. Acid rains are produced by
A. excess NO₂ and SO₂ from burning fossil fuels
B. excess production of NH₃ by industry and coal gas
C. excess release of carbon monoxide by incomplete combustion
D. excess formation of CO₂ by combustion and animal respiration
Correct Answer: A. excess NO₂ and SO₂ from burning fossil fuels
97. Ultraviolet radiations from sunlight causes a reaction that produces
A. fluorides
B. carbon monoxide
C. sulphur dioxide
D. ozone
Correct Answer: D. ozone
98. The equal sharing of Earth’s resources is specifically known as
A. Environmental justice
B. Sustainability
C. Environmental equity
D. Ecological foot printing
Correct Answer: C. Environmental equity
99. Depletion of the stratospheric ozone layer occurs when molecules of ozone are destroyed by chemicals such as
A. CFC
B. DDT
C. O₃
D. PCB
Correct Answer: A. CFC
100. Which one of the following is not a major cause of biodiversity loss?
A. Habitat loss
B. Climate change
C. Invasive Species
D. Zoonotic diseases
Correct Answer: D. Zoonotic diseases
101. If you analyzed waste water directly after primary treatment, what would you notice?
A. Harmful bacteria and other biological agents have been killed or removed
B. The water is potable
C. Much of the dissolved solids have been removed
D. Many suspended solids have been removed
Correct Answer: D. Many suspended solids have been removed
102. Carbon monoxide is a pollutant because
A. reacts with hemoglobin
B. makes nervous system inactive
C. it reacts with O₂
D. it inhibits glycolysis
Correct Answer: A. reacts with hemoglobin
103. Water is essential to life because it has many special properties. Which one of the following is a special property of water?
A. It is able to covalently bond to other water molecules
B. It is good at dissolving other substances
C. It easily heats up
D. It easily cools
Correct Answer: B. It is good at dissolving other substances
104. The supersonic jets cause pollution by the thinning of
A. O₂ layer
B. O₃ layer
C. CO₂ layer
D. SO₂ layer
Correct Answer: B. O₃ layer
105. Supercritical CO₂ held at or above its critical temperature and critical pressure, adopts properties
A. midway of solid and gas
B. of liquid only
C. of gas only
D. midway between liquid and gas
Correct Answer: D. midway between liquid and gas
106. Which form of symbiosis benefits one member of the interaction, but neither benefits nor harms the other member?
A. Parasitism
B. Commensalism
C. Sequentialism
D. Mutualism
Correct Answer: B. Commensalism
107. What practice allows farmers to improve soil fertility, diversify their crops, and reduce pesticide costs by naturally breaking the cycle of weeds, insects, and diseases?
A. Monoculture
B. Biological control
C. Crop sharing
D. Crop rotation
Correct Answer: D. Crop rotation
108. Which of the following is absent in polluted water?
A. Hydrilla
B. Water hyacinth
C. Larva of stone fly
D. Blue green algae
Correct Answer: C. Larva of stone fly
109. A population has unlimited resources and exhibits rapid and sustained population growth. This type of growth would be best described by which one of the following?
A. Exponential
B. Logistic
C. Sigmoidal
D. Parabolic
Correct Answer: A. Exponential
110. Which is the result of damage to relative biological effectiveness?
A. High temperature
B. Pollution
C. Radiation
D. Low temperature
Correct Answer: C. Radiation
111. The most common indicator organism that represents polluted water is
A. C. vibrio
B. Entamoeba histolytica
C. E. coli
D. P. typhi
Correct Answer: C. E. coli
112. Food chain in which microorganisms breakdown the food formed by primary producers is
A. parasitic food chain
B. detritus food chain
C. consumer food chain
D. predator food chain
Correct Answer: B. detritus food chain
113. What is the best pH of the soil for cultivation of plants?
A. 3.4 – 5.4
B. 6.5 – 7.5
C. 4.5 – 8.5
D. 5.5 – 6.5
Correct Answer: D. 5.5 – 6.5
114. Huge solid waste liberated from Iron and Steel industry is
A. Red mud
B. Fly ash
C. Bottom ash
D. Granulated slag
Correct Answer: D. Granulated slag
115. Major aerosol pollutant in jet plane emission is
A. sulphur dioxide
B. carbon monoxide
C. methane
D. fluorocarbon
Correct Answer: D. fluorocarbon
116. The process of rapid cooling of parts in metallurgical operation is called
A. Annealing
B. Quenching
C. Tempering
D. Toughening
Correct Answer: B. Quenching
117. Most hazardous metal pollutant of automobile exhausts is
A. mercury
B. cadmium
C. lead
D. copper
Correct Answer: C. lead
118. Gas released during Bhopal tragedy was
A. methyl isocyanate
B. potassium isothiocyanate
C. sodium isothiocyanate
D. ethyl isothiocyanate
Correct Answer: A. methyl isocyanate
119. The presence of nitrogen in waste water is due to alteration of
A. carbohydrate
B. protein
C. fat
D. vitamin
Correct Answer: B. protein
120. Photochemical smog is a resultant of the reaction among
A. NO₂, O₃ and peroxyacetyl nitrate in the presence of sunlight
B. CO₂ and peroxyacetyl nitrate in the presence of sunlight
C. CO₂ and NO₂ at low temperature
D. high concentration of NO₂, O₃, and CO in the evening
Correct Answer: A. NO₂, O₃ and peroxyacetyl nitrate in the presence of sunlight
121. By definition, what are you most likely to find in a biodiversity hotspot?
A. A large abundance of endangered species
B. A large number of endemic species
C. Mostly eukaryotic species
D. Extremophiles
Correct Answer: B. A large number of endemic species
122. “Effective dose-50%” describes which one of the following?
A. The dose that results in 50% mortality
B. The dose that results in 50% survival
C. The dose that is 50% less than the lethal dose
D. The dose that results in a significant response in 50% of subjects
Correct Answer: D. The dose that results in a significant response in 50% of subjects
123. Green house effect is warming due to
A. infra-red rays reaching earth
B. moisture layer in atmosphere
C. increase in temperature due to increase in carbon dioxide concentration of atmosphere
D. ozone layer of atmosphere
Correct Answer: C. increase in temperature due to increase in carbon dioxide concentration of atmosphere
124. A disease caused by eating fish contaminated industrial waste, containing mercury compounds, is called
A. Osteosclerosis
B. Hashimoto’s disease
C. Bright’s disease
D. Minamata disease
Correct Answer: D. Minamata disease
125. What is B.O.D.?
A. The amount of O₂ utilized by organisms in water
B. The amount of O₂ utilized by microorganisms for decomposition
C. The total amount of O₂ present in water
D. All of the above
Correct Answer: B. The amount of O₂ utilized by microorganisms for decomposition
126. In which year the first environmental conference (Stockholm Conference) was held?
A. 1965
B. 1968
C. 1970
D. 1972
Correct Answer: D. 1972
127. What is the carbon credit?
A. It is the difference between the carbon emission allowed and actually emitted carbon
B. It is the loan amount by IMF for reducing pollution
C. It is loan given to poor people for buying Modern Stoves
D. All of the above
Correct Answer: A. It is the difference between the carbon emission allowed and actually emitted carbon
128. Coal, oil, and natural gas are created _ and contain the remains of _
A. over millions of years; algae and plants
B. over millions of years; dinosaurs and other animals
C. over hundreds of years; algae and plants
D. over hundreds of years; dinosaurs and other animals
Correct Answer: A. over millions of years; algae and plants
129. How carbon monoxide, emitted by automobiles, prevents transport of oxygen in the body tissues?
A. By forming a stable compound with hemoglobin
B. By obstructing the reaction of oxygen with hemoglobin
C. By changing oxygen into carbon dioxide
D. By destroying the hemoglobin
Correct Answer: A. By forming a stable compound with hemoglobin
130. If there was no CO₂ in the earth’s atmosphere, the temperature of earth’s surface would be
A. higher than the present
B. dependent on the amount of oxygen in atmosphere
C. same as present
D. less than the present
Correct Answer: D. less than the present
131. Upper part of sea aquatic ecosystem contains
A. plankton
B. neuston
C. plankton and neuston
D. benthos
Correct Answer: C. plankton and neuston
132. The optimum temperature for sludge digestion is
A. 10°C
B. 25°C
C. 37°C
D. 50°C
Correct Answer: C. 37°C
TOPIC-WISE SUMMARY
| Topic No. | Topic Name | Question Numbers |
|---|---|---|
| 1 | Physics | 1-18 |
| 2 | Chemistry | 19-50 |
| 3 | Biology | 51-71 |
| 4 | Environmental Science & Pollution | 72-132 |