WBCS MAIN 2020 P-4 Science-Technology & EVS MCQ
WBCS MAIN 2020 P-4 Science-Technology & EVS One Liner
Topic 1: Physics
1. What is the dimension of energy in terms of mass (M), length (L) and time (T)?
Ans: ML²T⁻²
2. In which year did Einstein propose the Special Theory of Relativity?
Ans: 1905
3. What happens to current during a short circuit?
Ans: Increases heavily
4. Which element is the best conductor of electricity?
Ans: Silver
5. For which work did Einstein receive the Nobel Prize?
Ans: Photoelectric effect
6. A person hears an echo after 2 seconds from a cliff. If sound speed is 346 m/s, what is the distance to the cliff?
Ans: 346 meters
7. Who proposed the Uncertainty Principle in quantum mechanics?
Ans: Heisenberg
8. What is the typical size of an atom?
Ans: 10⁻¹⁰ meter
9. Two bullets are fired horizontally from the same height with different masses and velocities. Which hits the ground first?
Ans: Both will reach simultaneously
10. At what temperature does water have maximum density?
Ans: 4°C
11. An athlete runs one round of a 200m diameter circular track. What distance is covered?
Ans: 628 meters
12. Where is acceleration due to gravity maximum on Earth?
Ans: At the surface of the earth
13. What is the quantum of light called?
Ans: Photon
14. What is the ability of the eye to focus on objects at different distances called?
Ans: Accommodation
15. What is the unit of density in CGS system?
Ans: gm/cm³
16. Which frequency is NOT in the audible range for humans?
Ans: 5 Hz
17. What causes a mild wind on the shore of a calm river in summer?
Ans: Convection currents
18. Which parameter is the same for molecules of all gases at a given temperature?
Ans: Average kinetic energy
19. What happens to a circular hole in a metal sheet when heated?
Ans: Gets larger
20. What is -40°C in Fahrenheit scale?
Ans: -40°F
21. Why do stars twinkle?
Ans: Due to refraction of light
22. Which pair represents units of the same physical quantity?
Ans: Joule and Calorie (both energy units)
23. Two resistors R and 2R are connected in series. What is the ratio of thermal energy developed?
Ans: 1:2
24. What is the average speed formula for equal distances covered at different speeds v₁ and v₂?
Ans: 2/v = 1/v₁ + 1/v₂
25. Which property of light does NOT change during refraction?
Ans: Frequency
26. What is the gravitational force on the moon compared to Earth?
Ans: 1/6 of that on Earth
27. Which substance takes the longest to cool from 80°C to 20°C?
Ans: Water (highest specific heat)
28. Can emf be induced by moving a conductor in a magnetic field or by changing the magnetic field?
Ans: Both statements are true
29. A porter lifts 15kg luggage to 1.5m height. What is the work done? (g=10 m/s²)
Ans: 225 Joules
30. What discovery won the first Nobel Prize in Physics?
Ans: X-ray
31. What is 10°C equivalent to in Fahrenheit?
Ans: 50°F
32. What is a line joining places with equal temperature called?
Ans: Isotherm
33. What gas is produced by lightning in the atmosphere?
Ans: NO (Nitric oxide)
34. What is 10 miles equivalent to in kilometers?
Ans: 16 km
35. Which planet takes only 9.9 hours for one rotation?
Ans: Jupiter
Topic 2: Chemistry
36. What is the pH value of a neutral solution?
Ans: 7
37. Which statement is NOT correct about trends across a period in the Periodic Table?
Ans: The atoms lose their electrons more easily
38. A wire of resistance R is cut into three equal parts and connected in parallel. What is R/R₁?
Ans: 9
39. Which element is a good conductor?
Ans: Silver
40. What happens when dilute HCl is added to iron filings?
Ans: Hydrogen gas and iron chloride are produced
41. Which metal can be easily cut with a knife?
Ans: Sodium
42. A nucleus with 6 protons and 8 neutrons emits two α particles. What remains?
Ans: 2 protons and 4 neutrons
43. In one average-life of radioactive decay, how much of the active nuclei decay?
Ans: More than half
44. How many atoms are in one mole of an element?
Ans: 6.022 × 10²³
45. What type of reaction is Fe₂O₃ + 2Al → Al₂O₃ + 2Fe?
Ans: Displacement reaction
46. What is the chemical formula of Magnesium Chloride?
Ans: MgCl₂
47. Who gave the first periodic table?
Ans: Mendeleev
48. What does C₂H₅OH stand for?
Ans: Ethanol
49. How many valence electrons are in Cl⁻ ion?
Ans: 8
50. How many neutrons are in a hydrogen nucleus?
Ans: 0
51. How is energy generated in stars?
Ans: Nuclear fusion
52. What do two isotopes have in common?
Ans: Same proton number
53. Which statement about binding energy of a nucleus is WRONG?
Ans: It is the sum of the kinetic energy of all the nucleons in the nucleus
Topic 3: Biology
54. Where does the human eye form the image of an object?
Ans: Retina
55. Where does the breakdown of pyruvate to CO₂, water and energy take place?
Ans: Mitochondria
56. Who discovered the nucleus of a living cell?
Ans: Robert Brown
57. Who discovered Penicillin?
Ans: Alexander Fleming
58. Which bacteria causes peptic ulcer?
Ans: Helicobacter pylori
59. What is the function of xylem in plants?
Ans: Transport of water
60. Which is a plant hormone?
Ans: Cytokinin
61. What is the typical size of a Prokaryotic cell?
Ans: 1-10 micrometer
62. Which organism reproduces asexually through budding?
Ans: Yeast
63. Who discovered the cell?
Ans: Robert Hooke
64. Who discovered the electron?
Ans: J.J. Thomson
65. What is the tissue that connects muscle to bone called?
Ans: Tendon
66. Which is NOT part of the female reproductive system?
Ans: Vas deferens
67. What does the anther contain?
Ans: Pollen grains
68. What system are the kidneys part of?
Ans: Excretion
69. What does PCR stand for?
Ans: Polymerase Chain Reaction
70. What is the gap between two neurons called?
Ans: Synapse
71. What was the 2020 Nobel Prize in Medicine awarded for?
Ans: Discovery of Hepatitis C virus
72. In which year did Alexander Fleming discover Penicillin?
Ans: 1928
73. Which vitamin was discovered by Henrik Dam?
Ans: Vitamin K
Topic 4: Environmental Science & Pollution
74. Which is NOT a biomass energy source?
Ans: Nuclear energy
75. Who first used the term ‘Bhugol’ in ‘Surya Siddhanta’?
Ans: Aryabhatta
76. What is Kanha National Park famous for?
Ans: Tiger
77. Which animal is protected in Kaziranga National Park?
Ans: Rhinoceros unicornis (One-horned rhinoceros)
78. What is the Jar test used to determine?
Ans: Coagulant dose
79. Which treatment removes nonbiodegradable organic pollutants from wastewater?
Ans: Tertiary treatment
80. Where is the ozone layer present?
Ans: Stratosphere
81. When was the Environmental Protection Act enacted?
Ans: 1986
82. What does the Nalgonda method remove from water?
Ans: Fluoride
83. Which secondary pollutant is produced by UV rays?
Ans: O₃ (Ozone)
84. What is the result of ozone layer depletion?
Ans: UV radiations reach the earth
85. What is the Amoco Cadiz incident related to?
Ans: Oil slick
86. What is formazin used for in turbidity analysis?
Ans: To make turbidity standard
87. When were National Ambient Air Quality Standards notified by CPCB?
Ans: 1994
88. What causes Minamata disease?
Ans: Organic mercury
89. What is flame photometry suitable for determining?
Ans: Alkali metals
90. Where is Kanha National Park situated?
Ans: Madhya Pradesh
91. When was the ozone layer over Antarctica discovered?
Ans: 1985
92. Which is the largest Tiger Reserve in India?
Ans: Nagarjunsagar Srisailam
93. What causes Black foot disease?
Ans: Excess of arsenic in water
94. What can ultrafiltration remove?
Ans: All of the above (suspended solids, bacteria, protozoa)
95. What is used as a microbial indicator of water contamination?
Ans: Coliform bacteria
96. What is the nature of sea water?
Ans: Alkaline
97. In which industry do workers suffer from Byssinosis?
Ans: Textile
98. What does MAB stand for?
Ans: Man and Biosphere
99. Which is a widely-used aerobic wastewater treatment system?
Ans: Activated sludge process
100. What type of pollution is photochemical smog related to?
Ans: Air pollution
101. What does a biome consist of?
Ans: Both plant and animal communities
102. When is Ozone Day observed?
Ans: September 16
103. What is the process of breaking pollutants in soil by microorganisms called?
Ans: Bioremediation
104. What does E. coli indicate in water pollution?
Ans: Faecal matter
105. What is used as a coagulant for phosphate removal in water?
Ans: Aluminium sulphate
106. Which instrument is used for detecting polyaromatic hydrocarbons?
Ans: Gas Chromatography
107. What are Savannahs?
Ans: Grassland with scattered trees
108. What is the most abundant hydrocarbon pollutant in the atmosphere?
Ans: Methane
109. Which device is appropriate for removing fine cement dust from exhaust gases?
Ans: Electrostatic precipitator
110. What is a cyclone collector used for minimizing?
Ans: Air pollution
111. What does MPN (Most Probable Number) indicate?
Ans: Faecal pollution
112. At what wavelength does ozone undergo photolysis?
Ans: < 320 nm
113. What causes Mango necrosis (Black Tip)?
Ans: SO₂
114. What is the main constituent of gobar gas?
Ans: Methane
115. What does overgrazing cause?
Ans: Soil erosion
116. Which species of chromium is toxic in water?
Ans: Cr⁶⁺
117. What is BOD related to?
Ans: Organic pollutants
118. Which air pollutant causes leaf curling?
Ans: SO₂
119. What does BOD stand for?
Ans: Biochemical Oxygen Demand
120. What causes depletion of the ozone layer?
Ans: CFCs
121. What kind of treatment is activated sludge process?
Ans: Biological treatment
122. Which type of pollution causes jaundice?
Ans: Water pollution
SUMMARY
| Topic | Subject | Number of Questions |
|---|---|---|
| 1 | Physics | 35 |
| 2 | Chemistry | 18 |
| 3 | Biology | 20 |
| 4 | Environmental Science & Pollution | 49 |
| Total | Science, Technology & EVS | 122 |
WBCS MAIN 2020 P-4 Science-Technology & EVS MCQ
Topic 1: Physics
1. In terms of basic units of mass (M), length (L) and time (T), dimension of energy is
A. ML²T⁻¹
B. MLT⁻¹
C. MLT⁻¹
D. ML²T⁻²
Correct Answer: D. ML²T⁻²
2. Einstein proposed the idea of special theory of relativity in the year
A. 1901
B. 1903
C. 1905
D. 1907
Correct Answer: C. 1905
3. At the time of short circuit, the current in the circuit
A. reduces substantially
B. does not change
C. increases heavily
D. vary continuously
Correct Answer: C. increases heavily
4. Which of the following elements is a conductor?
A. Aluminium
B. Mercury
C. Silicon
D. Silver
Correct Answer: D. Silver
5. Einstein received Nobel Prize for his work on
A. special theory of relativity
B. photoelectric effect
C. brownian motion
D. None of the above
Correct Answer: B. photoelectric effect
6. A person clapped his hands near a cliff and heard the echo after 2s. What is the distance of the cliff from the person if the speed of the sound is taken as 346 meters/s?
A. 173 meter
B. 346 meter
C. 692 meter
D. 1384 meter
Correct Answer: B. 346 meter
7. Uncertainty relation in quantum mechanics was proposed by
A. Rutherford
B. Bohr
C. Heisenberg
D. Feynman
Correct Answer: C. Heisenberg
8. What is the typical size of an atom?
A. 1 meter
B. 10⁻² meter
C. 10⁻⁶ meter
D. 10⁻¹⁰ meter
Correct Answer: D. 10⁻¹⁰ meter
9. Two bullets are fired simultaneously and horizontally from the same vertical height. The first bullet has mass and velocity m₁ and v₁ respectively and the second one has mass and velocity m₂ and v₂ respectively. Which bullet will hit the ground first?
A. The faster one
B. The slower one
C. Both will reach simultaneously
D. Will depend on masses
Correct Answer: C. Both will reach simultaneously
10. The temperature, in centigrade scale, at which the density of water is maximum
A. 100°C
B. 44°C
C. 4°C
D. 0°C
Correct Answer: C. 4°C
11. An athlete completes one round of a circular track of diameter 200m. What will be the distance covered (closest value among the options)?
A. 528 meter
B. 628 meter
C. 314 meter
D. 1256 meter
Correct Answer: B. 628 meter
12. Acceleration due to gravity of earth is maximum at
A. the center of the earth.
B. the midpoint of the center and the surface of the earth.
C. the surface of the earth.
D. a height equal to the radius of the earth from the surface of the earth.
Correct Answer: C. the surface of the earth.
13. The quanta of light is called
A. proton
B. photon
C. phonon
D. neutron
Correct Answer: B. photon
14. The human eye can focus on objects at different distances by adjusting the focal length of the eye lens. This is due to
A. presbyopia
B. accommodation
C. near-sightedness
D. far-sightedness
Correct Answer: B. accommodation
15. The unit of density in CGS system is
A. gm/cm⁴
B. gm/cm³
C. gm/cm²
D. gm/cm
Correct Answer: B. gm/cm³
16. Which of the following frequencies is not in the audible range of sound for human beings?
A. 5 Hz
B. 50 Hz
C. 500 Hz
D. 5000 Hz
Correct Answer: A. 5 Hz
17. In summer, a mild wind is often found on the shore of a calm river. This is caused due to
A. difference in thermal conductivity of water and soil.
B. convection currents.
C. conduction between air and the soil.
D. radiation from the soil.
Correct Answer: B. convection currents.
18. Which of the following parameters is the same for molecules of all gases at a given temperature?
A. Mass
B. Speed
C. Momentum
D. Kinetic energy
Correct Answer: D. Average kinetic energy
19. A metal sheet with a circular hole is heated. The hole
A. gets larger
B. gets smaller
C. remains of the same size
D. gets deformed
Correct Answer: A. gets larger
20. The reading in centigrade scale is (-)40°. What is the corresponding reading in Fahrenheit scale?
A. (-)60°
B. (-)40°
C. 60°
D. 40°
Correct Answer: B. (-)40°
21. The stars twinkle because of
A. reflection
B. refraction
C. diffraction
D. interference
Correct Answer: B. refraction
22. Which of the following pairs represent units of the same physical quantity?
A. Kelvin and Joule
B. Kelvin and Calorie
C. Newton and Calorie
D. Joule and Calorie
Correct Answer: D. Joule and Calorie
23. Two resistors R and 2R are connected in series in an electric circuit. The thermal energy developed in R and 2R are in the ratio
A. 2:1
B. 4:1
C. 1:4
D. 1:2
Correct Answer: D. 1:2
24. A person travelling on a straight line moves with a uniform speed v₁ for a distance x and with a uniform speed v₂ for the next equal distance. The average speed v is given by
A. v = (v₁ + v₂)/2
B. v = √(v₁v₂)
C. 2/v = 1/v₁ + 1/v₂
D. 1/v = 1/v₁ + 1/v₂
Correct Answer: C. 2/v = 1/v₁ + 1/v₂
25. When light is refracted, which of the following does not change?
A. Frequency
B. Wavelength
C. Velocity
D. Amplitude
Correct Answer: A. Frequency
26. Gravitational force on the surface of the moon is
A. 1/6 of that on the surface of the earth.
B. 1/5 of that on the surface of the earth.
C. 1/4 of that on the surface of the earth.
D. 1/3 of that on the surface of the earth.
Correct Answer: A. 1/6 of that on the surface of the earth.
27. Same mass of iron, copper, water and glycerine are heated to 80°C. Which substance among these will take largest time to cool down to 20°C?
A. Iron
B. Copper
C. Water
D. Glycerine
Correct Answer: C. Water
28. Consider the following statements:
(i) An emf can be induced by moving a conductor in a magnetic field.
(ii) An emf can be induced by changing the magnetic field.
A. (i) is true but (ii) is false
B. (ii) is true but (i) is false
C. Both (i) and (ii) are false
D. Both (i) and (ii) are true
Correct Answer: D. Both (i) and (ii) are true
29. A porter lifts a luggage of 15kg from the ground and puts it on his head 1.5m above the ground. The work done by him on the luggage is (g = 10 ms⁻²)
A. 25 Joule
B. 125 Joule
C. 225 Joule
D. 112.5 Joule
Correct Answer: C. 225 Joule
30. The first Nobel Prize in Physics was awarded for the discovery of
A. Photoelectric effect
B. Atomic nucleus
C. X-ray
D. Special theory of relativity
Correct Answer: C. X-ray
31. 10°C is equivalent to
A. 55°F
B. 60°F
C. 50°F
D. 52°F
Correct Answer: C. 50°F
32. Line joining places with equal temperature is called
A. Isotim
B. Isohyet
C. Isobar
D. Isotherm
Correct Answer: D. Isotherm
33. Lightning in the atmosphere produces
A. NO
B. CO
C. CO₂
D. NH₃
Correct Answer: A. NO
34. 10 miles is equivalent to
A. 12 km
B. 18 km
C. 14 km
D. 16 km
Correct Answer: D. 16 km
35. __ takes only 9.9 hours for a complete rotation around its own axis.
A. Jupiter
B. Mars
C. Saturn
D. Neptune
Correct Answer: A. Jupiter
Topic 2: Chemistry
36. The pH value of a neutral solution is
A. 3
B. 5
C. 7
D. 9
Correct Answer: C. 7
37. Which of the following statements is not a correct statement about the trends when going from left to right across the periods of Periodic Table?
A. The elements become less metallic in nature.
B. The number of valence electrons increases.
C. The atoms lose their electrons more easily.
D. The oxides become more acidic.
Correct Answer: C. The atoms lose their electrons more easily.
38. A piece of wire of resistance R is cut into three equal parts. These parts are then connected in parallel. If the equivalent resistance of this combination is R₁, then the ratio R/R₁ is
A. 1/3
B. 1
C. 3
D. 9
Correct Answer: D. 9
39. Which of the following elements is a conductor?
A. Aluminium
B. Mercury
C. Silicon
D. Silver
Correct Answer: D. Silver
40. What happens when dilute hydrochloric acid is added to iron fillings?
A. Hydrogen gas and iron chloride are produced.
B. Chlorine gas and iron hydroxide are produced.
C. No reaction takes place.
D. Iron salt and water are produced.
Correct Answer: A. Hydrogen gas and iron chloride are produced.
41. The metal which can be easily cut with a knife
A. Paper
B. Silver
C. Sodium
D. Gold
Correct Answer: C. Sodium
42. A nucleus has 6 protons and 8 neutrons. The nucleus emits two α particles. How many protons and neutrons will be left in the nucleus?
A. 2 and 4
B. 2 and 2
C. 4 and 6
D. 5 and 7
Correct Answer: A. 2 and 4
43. In one average-life of radioactive decay
A. half the active nuclei decay.
B. less than half the active nuclei decay.
C. more than half the active nuclei decay.
D. all the nuclei decay.
Correct Answer: C. more than half the active nuclei decay.
44. How many atoms are there in one mole atom of an element?
A. 5.015 × 10¹⁵
B. 6.022 × 10²³
C. 4.397 × 10²⁶
D. 6.589 × 10²⁰
Correct Answer: B. 6.022 × 10²³
45. Fe₂O₃ + 2Al → Al₂O₃ + 2Fe. This reaction is an example of a
A. combination reaction
B. double displacement reaction
C. decomposition reaction
D. displacement reaction
Correct Answer: D. displacement reaction
46. Write the chemical formula of Magnesium Chloride.
A. MgCl
B. MgCl₂
C. MgCl₃
D. MgCl₄
Correct Answer: B. MgCl₂
47. The first periodic table was given by
A. Mendel
B. Mendeleev
C. Bohr
D. Dalton
Correct Answer: B. Mendeleev
48. The chemical formula C₂H₅OH stands for
A. Methane
B. Methanol
C. Ethane
D. Ethanol
Correct Answer: D. Ethanol
49. Number of valence electrons in Cl⁻ ion are
A. 16
B. 8
C. 17
D. 18
Correct Answer: B. 8
50. The number of neutrons in Hydrogen nucleus is
A. 0
B. 1
C. 2
D. 3
Correct Answer: A. 0
51. Energy generation in stars takes place mainly via
A. nuclear fission
B. chemical displacement reaction
C. nuclear fusion
D. chemical additive reaction
Correct Answer: C. nuclear fusion
52. Two isotopes have same
A. mass number
B. difference of neutron number and proton number
C. neutron number
D. proton number
Correct Answer: D. proton number
53. Which of the following is a wrong description of binding energy of a nucleus?
A. It is the energy required to break a nucleus into its constituent nucleons.
B. It is the energy made available when free nucleons combine to form a nucleus.
C. It is the sum of the rest mass energies of its nucleons minus the rest mass energy of the nucleus.
D. It is the sum of the kinetic energy of all the nucleons in the nucleus.
Correct Answer: D. It is the sum of the kinetic energy of all the nucleons in the nucleus.
Topic 3: Biology
54. The human eye forms the image of an object at its
A. cornea
B. iris
C. pupil
D. retina
Correct Answer: D. retina
55. The breakdown of pyruvate to give carbon dioxide, water and energy takes place in
A. cytoplasm
B. mitochondria
C. chloroplast
D. nucleus
Correct Answer: B. mitochondria
56. The nucleus of a living cell was discovered by
A. Charles Darwin
B. Robert Hooke
C. Gregor Mendel
D. Robert Brown
Correct Answer: D. Robert Brown
57. Penicillin was discovered by
A. Gregor Mendel
B. Francis Crick
C. James Watson
D. Alexander Fleming
Correct Answer: D. Alexander Fleming
58. The bacteria which causes peptic ulcer
A. Lactobacillus acidophilus
B. Helicobacter pylori
C. Peptostreptococcus
D. Streptococcus avium
Correct Answer: B. Helicobacter pylori
59. The xylem in plants are responsible for
A. transport of water.
B. transport of food.
C. transport of amino acids.
D. transport of oxygen.
Correct Answer: A. transport of water.
60. Which of the following is a plant hormone?
A. Insulin
B. Thyroxin
C. Oestrogen
D. Cytokinin
Correct Answer: D. Cytokinin
61. What is the typical size of a Prokaryotic cell?
A. 1-10 meter
B. 1-10 millimeter
C. 1-10 micrometer
D. 1-10 nanometer
Correct Answer: C. 1-10 micrometer
62. Asexual reproduction takes place through budding in
A. amoeba
B. yeast
C. plasmodium
D. leishmania
Correct Answer: B. yeast
63. Cell was discovered by
A. Charles Darwin
B. Robert Hooke
C. Gregor Mendel
D. Robert Brown
Correct Answer: B. Robert Hooke
64. Electron was discovered by
A. Bohr
B. Thomson
C. Planck
D. Heisenberg
Correct Answer: B. J.J. Thomson
65. Tissue that connects muscle to bone in humans is known as
A. Phloem
B. Adipose
C. Tendon
D. Epithelial
Correct Answer: C. Tendon
66. Which of the following is not a part of the female reproductive system in human beings?
A. Ovary
B. Uterus
C. Vas deferens
D. Fallopian tube
Correct Answer: C. Vas deferens
67. The anther contains
A. sepals
B. ovules
C. pistil
D. pollen grains
Correct Answer: D. pollen grains
68. The kidneys in human beings are a part of the system for
A. Excretion
B. Nutrition
C. Respiration
D. Transportation
Correct Answer: A. Excretion
69. PCR is a relatively simple and widely used molecular biology technique to amplify and detect DNA and RNA sequences. PCR stands for
A. Protein chain reaction
B. Polymerase chain reaction
C. Polymerase carbon reaction
D. Protein carbon reaction
Correct Answer: B. Polymerase chain reaction
70. The gap between two neurons is called a
A. dendrite
B. synapse
C. axon
D. impulse
Correct Answer: B. synapse
71. The Nobel Prize in Physiology or Medicine in the year 2020 was awarded for
A. the development of a method for genome editing.
B. the discovery of Hepatitis C virus.
C. the discovery of Hepatitis B virus.
D. the discovery of directed evolution of enzymes.
Correct Answer: B. the discovery of Hepatitis C virus.
72. In which year Alexander Fleming discovered Penicillin?
A. 1930
B. 1928
C. 1932
D. 1934
Correct Answer: B. 1928
73. Which Vitamin was discovered by Henrik Dam?
A. Vitamin K
B. Vitamin C
C. Vitamin E
D. Vitamin A
Correct Answer: A. Vitamin K
Topic 4: Environmental Science & Pollution
74. Which of the following is not an example of a biomass energy source?
A. Wood
B. Gobar gas
C. Nuclear energy
D. Coal
Correct Answer: C. Nuclear energy
75. The term ‘Bhugol’ was first used in the book ‘Surya Siddhanta’ written by
A. Brahmagupta
B. Aryabhatta
C. Bhaskaracharya
D. Varah Mihir
Correct Answer: B. Aryabhatta
76. Kanha National Park is famous for
A. Rhinoceros
B. Tiger
C. Birds
D. Crocodiles
Correct Answer: B. Tiger
77. Animal species protected in Kaziranga National Park is
A. Pantherleo
B. Rhinoceros unicornis
C. Panther tigris
D. Macacamalatta
Correct Answer: B. Rhinoceros unicornis
78. Jar test is used to determine
A. Turbidity of water
B. Settling of solids
C. Coagulant dose
D. Coagulant time
Correct Answer: C. Coagulant dose
79. The treatment designed to remove nonbiodegradable organic pollutants and mineral nutrients from waste water is
A. Lagoons
B. Imhoff tank
C. Secondary treatment
D. Tertiary treatment
Correct Answer: D. Tertiary treatment
80. Layer of Ozone is present in
A. Stratosphere
B. Troposphere
C. Thermosphere
D. Mesosphere
Correct Answer: A. Stratosphere
81. The Environmental Protection Act was enacted in
A. 1986
B. 1985
C. 1987
D. 1972
Correct Answer: A. 1986
82. Nalgonda method was developed by Indian Scientist to remove which chemical species from water?
A. Iron
B. Manganese
C. Chromium
D. Fluoride
Correct Answer: D. Fluoride
83. Which secondary pollutant is produced by UV rays of sun lights?
A. SO₂
B. CO
C. Fluorides
D. O₃
Correct Answer: D. O₃
84. Result of Ozone hole is
A. greenhouse effect
B. global warming
C. acid rain
D. UV radiations reach the earth
Correct Answer: D. UV radiations reach the earth
85. The name Amoco Cadiz is related with
A. Nuclear waste site
B. Oil slick
C. Toxic cloud
D. Forest fire
Correct Answer: B. Oil slick
86. In turbidity analysis, formazin is used
A. to stabilize the samples.
B. to preserve the sample.
C. to make turbidity standard.
D. to remove colour interferences.
Correct Answer: C. to make turbidity standard.
87. National Ambient Air Quality Standards for major pollutants were notified by CPCB in
A. 1994
B. 1984
C. 2004
D. 1974
Correct Answer: A. 1994
88. Minamata disease is caused by
A. As vapour
B. Hg vapour
C. organic Hg
D. Dissolved As
Correct Answer: C. organic Hg
89. Flame photometry is suitable method for the determination of
A. heavy metals
B. dissolved gases
C. dissolved organics
D. alkali metals
Correct Answer: D. alkali metals
90. Kanha National Park is situated in
A. Assam
B. Rajasthan
C. Uttar Pradesh
D. Madhya Pradesh
Correct Answer: D. Madhya Pradesh
91. The major stratospheric ozone layer over Antarctica was discovered in
A. 1983
B. 1985
C. 1987
D. 1980
Correct Answer: B. 1985
92. The largest Tiger Reserve in India is
A. Sundarban
B. Periyar
C. Kanha
D. Nagarjunsagar Srisailam
Correct Answer: D. Nagarjunsagar Srisailam
93. Black foot disease is caused by
A. excess of fluoride in water
B. deficiency of iodine in water
C. excess of arsenic in water
D. excess of iodine in water
Correct Answer: C. excess of arsenic in water
94. Ultrafiltration can remove
A. suspended solids
B. bacteria
C. protozoa
D. All of the above
Correct Answer: D. All of the above
95. Which one of the following is used as microbial indicator of water contamination?
A. Coliform bacteria
B. Giardia
C. Cryptosporidium
D. Tobacco mosaic virus
Correct Answer: A. Coliform bacteria
96. Sea water is
A. acidic
B. alkaline
C. neutral
D. hypotonic
Correct Answer: B. alkaline
97. In which Industry, workers suffer from Byssinosis?
A. Cardboard
B. Textile
C. Plastic
D. Paper
Correct Answer: B. Textile
98. MAB stands for
A. Man and Biosphere
B. Man, Antibiotic and Bacteria
C. Man and Biotic Community
D. Mayer, Andersand and Bisby
Correct Answer: A. Man and Biosphere
99. The widely-used aerobic suspension type of liquid waste treatment system is
A. Rotating Biological Contractor
B. Percolating filter
C. Activated sludge process
D. Septic tank
Correct Answer: C. Activated sludge process
100. Photochemical smog is related to __ pollution.
A. air
B. water
C. soil
D. nostoc
Correct Answer: A. air
101. Biome have
A. plant communities
B. animal communities
C. trees only
D. Both (A) and (B)
Correct Answer: D. Both (A) and (B)
102. Ozone day is
A. January 30
B. September 16
C. April 21
D. December 25
Correct Answer: B. September 16
103. Pollutants in soil can be broken by microorganisms. The process is called
A. Probiotics
B. Bioremediation
C. Bio-augmentation
D. None of the above
Correct Answer: B. Bioremediation
104. E. Coli is used as an indicator organism to determine pollution of water with
A. pollen of aquatic plants
B. heavy metals
C. faecal matter
D. industrial effluents
Correct Answer: C. faecal matter
105. Which of the following is used as a coagulant for removal of phosphates in water?
A. Aluminium sulphate
B. Iron carbonate
C. Copper sulphate
D. Potassium chromate
Correct Answer: A. Aluminium sulphate
106. For the detection of polyaromatic hydrocarbons which of the following instruments is used?
A. Atomic absorption spectrophotometer
B. X-ray Diffractometer
C. Gas Chromatography
D. Flame photometer
Correct Answer: C. Gas Chromatography
107. Savannahs are
A. Tropical rain forests
B. Desert scrubs
C. Grassland with scattered trees
D. Dense forests with closed canopy
Correct Answer: C. Grassland with scattered trees
108. Most abundant pollutant in the atmosphere among hydrocarbon is
A. methane
B. propane
C. butane
D. benzpyrene
Correct Answer: A. methane
109. Cement dust is characterized by very fine particles. Which of the following air pollution control devices is appropriate for removing them from hot exhaust gases emanating from cement kiln?
A. Bag house
B. Cyclone
C. Venturi scrubber
D. Electrostatic precipitator
Correct Answer: D. Electrostatic precipitator
110. Cyclone collector is used for minimizing
A. Radioactive pollution
B. Air pollution
C. Noise pollution
D. Water pollution
Correct Answer: B. Air pollution
111. MPN (Most Probable Number) indicates
A. Thermal pollution
B. Air pollution
C. Faecal pollution
D. Industrial pollution
Correct Answer: C. Faecal pollution
112. Ozone undergoes photolysis due to ultraviolet radiations of wavelength
A. < 320 nm
B. < 400 nm
C. < 500 nm
D. < 600 nm
Correct Answer: A. < 320 nm
113. Mango necrosis (Black Tip) is due to
A. SO₂
B. HCl
C. PAH
D. PAN
Correct Answer: A. SO₂
114. Gobar gas contains mainly
A. Ethylene
B. Methane
C. Hydrogen and Ethylene
D. Hydrogen and Oxygen
Correct Answer: B. Methane
115. Overgrazing causes
A. Negative pollution
B. Positive pollution
C. Soil erosion
D. Reduction in crop yield
Correct Answer: C. Soil erosion
116. Which species of chromium is toxic in water?
A. Cr²⁺
B. Cr³⁺
C. Cr⁶⁺
D. Cr⁰
Correct Answer: C. Cr⁶⁺
117. BOD is related to
A. detergents
B. putrescibility
C. inorganic pollutants
D. organic pollutants
Correct Answer: D. organic pollutants
118. Air pollutant causing leaf curling is
A. SO₂
B. O₃
C. H₂S
D. CO
Correct Answer: A. SO₂
119. BOD stands for
A. Biochemical Oxygen Demand
B. Biotic Oxygen Dropping
C. Biochemical Oxygen Dressing
D. None of the above
Correct Answer: A. Biochemical Oxygen Demand
120. Peeling of Ozone umbrella is due to
A. CFCs
B. PAN
C. CO₂
D. Coal burning
Correct Answer: A. CFCs
121. Activated sludge is associated with management of waste and it is a kind of
A. Chemical treatment
B. Mechanical means
C. Biological treatment
D. Nuclear means
Correct Answer: C. Biological treatment
122. Which pollution causes Jaundice?
A. Water
B. Air
C. Land
D. Thermal
Correct Answer: A. Water
SUMMARY
| Topic | Subject | Question Numbers |
|---|---|---|
| 1 | Physics | 1-35 |
| 2 | Chemistry | 36-53 |
| 3 | Biology | 54-73 |
| 4 | Environmental Science & Pollution | 74-122 |
| Total | Science, Technology & EVS | 1-122 |