WBCS MAIN 2015 P-4 Science-Technology & EVS

WBCS MAIN 2015 P-4 Science-Technology & EVS. MCQ

WBCS MAIN 2015 P-4 Science-Technology & EVS. One Liner

Topic 1: Environmental Science & Pollution

1. Which term is NOT involved in air pollution?
Ans: DO (Dissolved Oxygen)

2. What do mufflers commonly prevent?
Ans: Noise pollution

3. At what noise level (in decibels) may physiological disorder occur?
Ans: 120 db

4. Which element is NOT involved in PAN (Peroxyacyl Nitrate) formation?
Ans: Hydrogen

5. What is the Global Warming Potential (GWP) of CO₂?
Ans: 1

6. What are flowing water ecosystems called?
Ans: Lotic

7. What is the parent rock from which soil is formed called?
Ans: R horizon

8. Who denoted the Competitive Exclusion Principle?
Ans: Gause

9. Where is the deepest point on Earth’s crust located?
Ans: Pacific Ocean (Mariana Trench)

10. What is the approximate distance of the mesosphere from Earth’s surface?
Ans: 50 Km

11. Which compound does NOT react with the ozone layer?
Ans: HFC (Hydrofluorocarbons)

12. Which health condition is arsenic associated with?
Ans: Melanoma

13. Which surface reflects back the most sunlight (highest albedo)?
Ans: Land covered with fresh snow

14. Which pollutants cause acid rain?
Ans: SO₂ and NO₂

15. What does ‘Green Accounting’ indicate?
Ans: Level of environmental pollution

16. In which state is maximum solar energy used in India?
Ans: Rajasthan

17. Which harmful gas is emitted from cigarette smoking?
Ans: CO (Carbon monoxide)

18. What was the Kyoto Protocol (1997) related to?
Ans: Reduction of greenhouse gas

19. Which one is a greenhouse gas?
Ans: CO₂

Topic 2: Biology – Human Body & Health

20. Deficiency of cobalt causes deficiency of which vitamin?
Ans: Vitamin B₁₂

21. Lead blocks the biosynthesis of which substance?
Ans: Haemoglobin

22. Where is the human body’s main organ of balance located?
Ans: Inner part of ear

23. Chemically, what are hormones?
Ans: Steroids (Note: Some are proteins, others steroids)

24. Which hormone controls blood pressure?
Ans: Aldosterone

25. When can the malarial parasite best be obtained from a patient?
Ans: In state of shivering

26. Which Plasmodium causes malignant malaria?
Ans: Plasmodium falciparum

27. Which fish helps in controlling mosquitoes in ponds and wells?
Ans: Gambusia Fish

28. Which minerals are required for muscle contraction?
Ans: Calcium, Potassium

29. What is involved in in-vitro fertilization technique?
Ans: Either zygote or early embryo up to 8 cell stage

30. Which cells are involved in allergic response?
Ans: Both Basophils and Mast Cells

31. Which is NOT an oncogenic virus?
Ans: Varicella Zoster Virus

32. Which are congenital anaemic disorders?
Ans: All of the above – Thalassemia, Sickle cell anemia, G-6 PD deficiency

33. Which vitamins act as free-radical inhibitors (antioxidants)?
Ans: Both Vitamin C and Vitamin E

34. Which enzyme is present in saliva?
Ans: Ptyalin (Salivary amylase)

Topic 3: Biology – Animals & Classification

35. Which animal has a single nostril?
Ans: Hagfish

36. In proportion to body size, which bird lays the largest eggs?
Ans: Kiwi

37. Which is the protected bird of India?
Ans: Great Indian Bustard

38. What is the study of bird’s nests called?
Ans: Nidology

39. What are salmon fishes also called?
Ans: Trout

40. Which is the oldest animal conserved in India?
Ans: Lion

41. Which animal lays eggs and does not produce young ones directly?
Ans: Echidna

Topic 4: Wildlife & Conservation

42. Which organization keeps zoo conservation data?
Ans: WZCS

43. Where is marsh crocodile conservation in Sundarbans located?
Ans: Bhagabatpur

44. When was the Tiger conservation project in India introduced?
Ans: 1973

Topic 5: Biology – Cell & Genetics

45. How do single cell animals reproduce?
Ans: Fission

46. What is the basic unit of life?
Ans: Gene

47. How can the location of a gene on sex chromosome or autosomes be identified?
Ans: Reciprocal cross

Topic 6: Chemistry

48. Which is a natural polymer?
Ans: Cellulose

49. What are amino acids the basis units of?
Ans: Proteins

50. What is marsh gas?
Ans: Methane

51. What is obtained from the bottom of the blast furnace in iron metallurgy?
Ans: Pig iron

52. What is the main ore of aluminium?
Ans: Bauxite

53. What is the unit of radioactivity?
Ans: Curie

54. What happens when a lead storage cell is charged?
Ans: Sulphuric Acid is formed

55. What is the temperature above which a real gas cannot be liquefied called?
Ans: Critical temperature

56. What is called Philosopher’s wool?
Ans: Zinc Oxide

57. Which does NOT contain silver?
Ans: German Silver

58. Which is called a stranger gas?
Ans: Xenon

59. Which is used as an explosive?
Ans: Nitroglycerine

60. What does carnalite on electrolysis give?
Ans: Mg & Cl

61. What is RDX also known as?
Ans: Cyclonite

62. What is the correct sequence of hydrocarbons in increasing order of molecular weight?
Ans: Methane, ethane, propane, butane

Topic 7: Physics

63. On what does the total energy of a gas at a given temperature depend?
Ans: Temperature

64. In which type of expansion is the work done by gas greatest?
Ans: Isothermal

65. Why is the sky blue?
Ans: Scattering of light (Rayleigh scattering)

66. What is the unit of Electron Volt?
Ans: Energy

67. What controls the chain reaction in a nuclear reactor?
Ans: Cadmium rods

68. What minimum property of light is required for photoelectric emission?
Ans: Frequency

69. What is the function of a choke coil in a fluorescent tube?
Ans: Reduces the current in the circuit

70. Why does a black hole not allow radiation to escape?
Ans: Due to its very high density

71. How does the volume of water change when heated from 0°C to 10°C?
Ans: First decreases, then increases

72. If Earth’s radius shrinks by 1% with same mass, how does ‘g’ change?
Ans: Increases by 2.0%

73. What causes diffusion of light in the atmosphere?
Ans: Dust particles

74. What is the weight of a weightless rubber balloon filled with 200 cc water in water?
Ans: Zero

75. What is the net resultant force on a car moving at uniform speed?
Ans: Zero

76. What phenomena are responsible for rainbow formation?
Ans: Dispersion, Refraction, and Internal reflection (All of the above)

77. Why doesn’t an artificial satellite fall down?
Ans: Earth’s gravity provides the necessary acceleration for its motion

Topic 8: Space & Astronomy

78. When did the universe originate?
Ans: 13.7 billion years ago

79. From what did life on Earth start?
Ans: RNA

80. Which is the shortest day of the year?
Ans: 22nd December

81. Which planet is known as the morning star?
Ans: Venus

82. What is Saturn’s position from the sun?
Ans: Sixth

83. What is the Galileo Project?
Ans: A multi-satellite navigation project by the European Union

84. Which comet did NASA’s Deep Impact mission study?
Ans: Tempel-1

85. Which is a spacecraft?
Ans: Giotto

Topic 9: Scientists & Discoveries

86. Which scientist shared the Nobel Prize in Physics with his son?
Ans: William Henry Bragg

87. When was C.V. Raman awarded the Nobel Prize?
Ans: 1930

88. What is David Bushnell credited with creating?
Ans: First submarine

89. What is Robert Webster known for?
Ans: Work on Influenza Virus

90. Who invented DDT?
Ans: Paul Muller

Topic 10: Computer & Technology

91. Which laser type is used in laser printers?
Ans: Semiconductor laser

92. Which term is associated with comparing processing speed?
Ans: MIPS (Million Instructions Per Second)

93. Where is India’s ‘Silicon Valley’ located?
Ans: Karnataka (Bangalore)

94. What type of printers are Laser Printers?
Ans: Page Printers

95. What is an encoder?
Ans: A digital circuit

96. Which satellite number did ISRO launch on 27th August 2015?
Ans: 24th

Topic 11: Earth & Geology

97. In which rock type are artesian wells found?
Ans: Sedimentary

Topic 12: Miscellaneous

98. What is printed on a commonly used fluorescent tube light?
Ans: 6500K

99. Which set of elements was primarily responsible for the origin of life?
Ans: Carbon, Hydrogen, Nitrogen

100. Which country will help India set up the Jaitapur Nuclear Power Station?
Ans: France

TOPIC-WISE SUMMARY

Topic No.Topic NameQuestion Numbers
1Environmental Science & Pollution1-19
2Biology – Human Body & Health20-34
3Biology – Animals & Classification35-41
4Wildlife & Conservation42-44
5Biology – Cell & Genetics45-47
6Chemistry48-62
7Physics63-77
8Space & Astronomy78-85
9Scientists & Discoveries86-90
10Computer & Technology91-96
11Earth & Geology97
12Miscellaneous98-100

WBCS MAIN 2015 P-4 Science-Technology & EVS. MCQ

Topic 1: Environmental Science & Pollution

1. The following term is not involved in air pollution.

A. SMOG
B. MMD
C. DO
D. VC

Correct Answer: C. DO

2. Mufflers are commonly used to prevent the

A. Radiation pollution
B. Noise pollution
C. Air pollution
D. Thermal pollution

Correct Answer: B. Noise pollution

3. Physiological disorder may occur when the noise level reaches

A. 110 db
B. 120 db
C. 135 db
D. 145 db

Correct Answer: B. 120 db

4. PAN formation does not include

A. Nitrogen
B. Ozone
C. Hydrogen
D. Hydrocarbon

Correct Answer: C. Hydrogen

5. The global warming potential of CO₂ is

A. 1
B. 2
C. 3
D. 4

Correct Answer: A. 1

6. Flowing water ecosystems also called

A. Pelagic
B. Estuarine
C. Lotic
D. Lentic

Correct Answer: C. Lotic

7. The parent rock from which soil is formed is also referred to as

A. A horizon
B. B horizon
C. C horizon
D. R horizon

Correct Answer: D. R horizon

8. Competitive exclusion principle was also denoted by

A. Darwin
B. Gause
C. Odum
D. Wallace

Correct Answer: B. Gause

9. The deepest point on the Earth’s crust is located in

A. Arctic ocean
B. Atlantic Ocean
C. Pacific Ocean
D. Indian Ocean

Correct Answer: C. Pacific Ocean

10. The distance of mesosphere from the Earth’s surface is approximately

A. 30 Km
B. 50 Km
C. 70 Km
D. 85 Km

Correct Answer: B. 50 Km

11. The following compound does not react with ozone layer

A. CFC
B. HFC
C. Halon
D. CCl₄

Correct Answer: B. HFC

12. Arsenic is associated with

A. Myeloma
B. Melanoma
C. Sarcoma
D. Glioma

Correct Answer: B. Melanoma

13. Which one of the following reflects back more sunlight as compared to the other three?

A. Sand desert
B. Paddy crop land
C. Land covered with fresh snow
D. Prairie grass land

Correct Answer: C. Land covered with fresh snow

14. Acid rain can be caused by the pollution of environment by

A. CO₂ and N₂
B. CO and CO₂
C. O₃ and CO
D. SO₂ and NO₂

Correct Answer: D. SO₂ and NO₂

15. ‘Green Accounting’ indicates

A. level of environmental pollution
B. Counting of environmental bodies
C. level of Greenary in the world
D. None of the above

Correct Answer: A. level of environmental pollution

16. Maximum solar energy is used in India in

A. Gujarat
B. Rajasthan
C. Karnataka
D. Tamilnadu

Correct Answer: B. Rajasthan

17. Cigarette smoking is harmful for health due to the emission of

A. CO₂
B. CO
C. KMnO₄
D. SO₂

Correct Answer: B. CO

18. “Kyoto Protocol”, signed in 1997 was related to

A. Reduction of green house gas
B. Pulse Polio Immunisation Program
C. World’s Youth Policy
D. Nuclear disarmament treaty

Correct Answer: A. Reduction of green house gas

19. Which one of the following is a green house gas?

A. SO₂
B. CO₂
C. O₂
D. All of the above

Correct Answer: B. CO₂

Topic 2: Biology – Human Body & Health

20. The deficiency of cobalt causes the deficiency of

A. Vitamin B₂
B. Vitamin B₆
C. Vitamin B₁₂
D. Vitamin C

Correct Answer: C. Vitamin B₁₂

21. Lead blocks the biosynthesis of

A. Muscle protein
B. Myoglobin
C. Haemoglobin
D. Ossein

Correct Answer: C. Haemoglobin

22. Human body’s main organ of balance is located in

A. Inner part of ear
B. Spine
C. Brain (front part)
D. Pituitary gland

Correct Answer: A. Inner part of ear

23. Chemically hormones are

A. Carbohydrates
B. Fatty Acids
C. Proteins
D. Steroids

Correct Answer: D. Steroids

24. Blood pressure is under control of

A. Adrenalin
B. Pituitary
C. Thyroid
D. Aldosterone

Correct Answer: D. Aldosterone

25. Malarial parasite could best be obtained from a patient

A. One hour before rise of temperature
B. In state of shivering
C. When temperature comes normal
D. 4 hours after the temperature reaches normal

Correct Answer: B. In state of shivering

26. Malignant malaria is caused by

A. Plasmodium ovale
B. Plasmodium falciparum
C. Plasmodium vivax
D. Plasmodium malaria

Correct Answer: B. Plasmodium falciparum

27. The release of which one of the following into ponds and wells helps in controlling the mosquitoes?

A. Crab
B. Turtle
C. Gambusia Fish
D. Snail

Correct Answer: C. Gambusia Fish

28. Human body requires some minerals for contraction of muscles

A. Calcium, Potassium
B. Calcium, Phosphorus
C. Calcium, Sodium
D. Sodium, Potassium

Correct Answer: A. Calcium, Potassium

29. In vitro fertilisation is a technique that involves transfer of which one of the following into the fallopian tube?

A. Zygote only
B. Embryo only upto 8 cell stage
C. Embryo of 32 cell stage
D. Either Zygote or early embryo upto 8 cell stage

Correct Answer: D. Either Zygote or early embryo upto 8 cell stage

30. Which type of cells are involved in allergic response?

A. Basophils
B. Mast Cell
C. Fibroblast cell
D. Both (A) and (B)

Correct Answer: D. Both (A) and (B)

31. All are Oncogenic Virus except:

A. HIV
B. Varicella Zoster Virus
C. HPV
D. Hepatitis-B

Correct Answer: B. Varicella Zoster Virus

32. Which of the following is congenital anaemic disorder?

A. Thalassemia
B. Sickle cell anemia
C. G-6 PD deficiency
D. All of the above

Correct Answer: D. All of the above

33. Which of the vitamins acts as a free-radical inhibitor in a human body?

A. Vitamin B₁
B. Vitamin C
C. Vitamin E
D. Both (B) and (C)

Correct Answer: D. Both (B) and (C)

34. Which of the following enzyme is present in saliva?

A. Pepsin
B. Trypsin
C. Ptyalin
D. Chymotrypsin

Correct Answer: C. Ptyalin

Topic 3: Biology – Animals & Classification

35. Animal with a single nostril is

A. Hagfish
B. Tortoise
C. Python
D. Shark

Correct Answer: A. Hagfish

36. In proportion of the size of the body which birds lay largest sized eggs.

A. Ostrich
B. Tinamons
C. Vulture
D. Kiwi

Correct Answer: D. Kiwi

37. The protected bird of India is

A. Monal
B. Dove
C. Great Indian Bustard
D. Crane

Correct Answer: C. Great Indian Bustard

38. Study of bird’s nest is

A. Ornithology
B. Nidology
C. Phenology
D. Ecology

Correct Answer: B. Nidology

39. Salmon fishes are also called

A. Bony fishes
B. Trout
C. Cod
D. Star fish

Correct Answer: B. Trout

40. The oldest animal conserved in India is

A. Tiger
B. Lion
C. Elephant
D. Black Bear

Correct Answer: B. Lion

41. Among the following, which one lays eggs and does not produce young ones directly?

A. Echidna
B. Kangaroo
C. Porcupine
D. Whale

Correct Answer: A. Echidna

Topic 4: Wildlife & Conservation

42. Zoo conservation data is kept by

A. ICBN
B. ICZN
C. WZCS
D. ICTV

Correct Answer: C. WZCS

43. Marsh crocodile conservation in Sundarbans is located in

A. Sajnekhali
B. Sudhanyakhali
C. Kalash Island
D. Bhagabatpur

Correct Answer: D. Bhagabatpur

44. Tiger conservation project in India was introduced from

A. 1953
B. 1963
C. 1973
D. 1983

Correct Answer: C. 1973

Topic 5: Biology – Cell & Genetics

45. Single cell animals reproduce by

A. Fission
B. Fusion
C. Budding
D. Regeneration

Correct Answer: A. Fission

46. The basic unit of life is

A. Nucleic acid
B. Protein
C. Gene
D. Lipo protein

Correct Answer: C. Gene

47. Location of a particular gene on sex chromosome or autosomes can be identified by

A. Test cross
B. Out cross
C. Back cross
D. Reciprocal cross

Correct Answer: D. Reciprocal cross

Topic 6: Chemistry

48. Which of the following is natural polymer?

A. Terylene
B. Orlon
C. Cellulose
D. Dacron

Correct Answer: C. Cellulose

49. The amino acids are basis units of

A. Lipids
B. Carbohydrates
C. Proteins
D. Vitamins

Correct Answer: C. Proteins

50. Marsh gas is

A. Methane
B. Ethane
C. Ethylene
D. None of the above

Correct Answer: A. Methane

51. In the metallurgy of iron, the material obtained from bottom of the blast furnace is

A. Slag
B. Pig iron
C. Cast iron
D. Wrought iron

Correct Answer: B. Pig iron

52. The main ore of aluminium is

A. Bauxite
B. Alumina
C. Potash-alum
D. Cryolite

Correct Answer: A. Bauxite

53. Which one is the unit of radio activity?

A. Curie
B. Tesla
C. Henry
D. Uranium

Correct Answer: A. Curie

54. When a lead storage cell is charged

A. Sulphuric Acid is consumed
B. Sulphuric Acid is formed
C. Lead sulphate is formed
D. Lead is consumed

Correct Answer: B. Sulphuric Acid is formed

55. The temperature above which a real gas cannot be liquefied is known as

A. Critical temperature
B. Boyle temperature
C. Inversion temperature
D. None of the above

Correct Answer: A. Critical temperature

56. Which one of the following is called Philosopher’s wool?

A. Zinc Bromide
B. Zinc Nitrate
C. Zinc Oxide
D. Zinc Chloride

Correct Answer: C. Zinc Oxide

57. Which one of the following does not contain silver?

A. Horn Silver
B. Ruby Silver
C. German Silver
D. Lunar Caustic

Correct Answer: C. German Silver

58. Which one of the following is also called a stranger gas?

A. Argon
B. Neon
C. Xenon
D. Nitrous Oxide

Correct Answer: C. Xenon

59. Which one of the following is used as an explosive?

A. Phosphorous trichloride
B. Mercuric Oxide
C. Graphite
D. Nitroglycerine

Correct Answer: D. Nitroglycerine

60. Carnalite on electrolysis gives

A. Ca & Cl
B. Na & CO
C. Al & Cl
D. Mg & Cl

Correct Answer: D. Mg & Cl

61. Which one of the following is known as RDX?

A. Cyanohydrin
B. Dextran
C. Cyclohexane
D. Cyclonite

Correct Answer: D. Cyclonite

62. Which one is the correct sequence in increasing order of molecular weights of the hydrocarbons?

A. Methane, ethane, propane and butane
B. Propane, butane, ethane and methane
C. Butane, ethane, propane and methane
D. Butane, propane, ethane and methane

Correct Answer: A. Methane, ethane, propane and butane

Topic 7: Physics

63. The total energy of a given mass of a gas at a given temperature depends on its

A. Pressure
B. Volume
C. Density
D. Temperature

Correct Answer: D. Temperature

64. A sample of gas expands from volume V₁ to V₂. The amount of work done by the gas is greatest when the expansion is

A. Adiabatic
B. Equal in all cases
C. Isothermal
D. Isobaric

Correct Answer: C. Isothermal

65. Blue colour of the sky is due to the phenomenon of

A. Scattering
B. Dispersion
C. Reflection
D. Refraction

Correct Answer: A. Scattering

66. Electron Volt is the unit of

A. Potential difference
B. Charge
C. Energy
D. Power

Correct Answer: C. Energy

67. In a nuclear reactor the chain reaction is controlled by introducing

A. Iron rods
B. Cadmium rods
C. Graphite rods
D. Platinum rods

Correct Answer: B. Cadmium rods

68. Photo electric emission occurs only when the incident light has more than a certain minimum

A. Power
B. Wavelength
C. Intensity
D. Frequency

Correct Answer: D. Frequency

69. Fluorescent tubes are fitted with a choke. The choke coil

A. Steps up the line voltage
B. Steps down the line voltage
C. Reduces the current in the circuit
D. Chokes low frequency current

Correct Answer: C. Reduces the current in the circuit

70. A black hole is a body in space which does not allow any radiation to come out. This property is due to its

A. very small size
B. very large size
C. very high density
D. very low size

Correct Answer: C. very high density

71. When water is heated from 0°C to 10°C. Its volume

A. Increases
B. Decreases
C. Does not change
D. First decreases and then increases

Correct Answer: D. First decreases and then increases

72. If the radius of the Earth were to shrink by one percent, its mass remaining the same, the value of ‘g’ on the earth’s surface would

A. Increase by 0.5%
B. Increase by 2.0%
C. Decrease by 0.5%
D. Decrease by 2.0%

Correct Answer: B. Increase by 2.0%

73. Diffusion of light in the atmosphere takes place due to

A. Dust particles
B. Carbon dioxide
C. Helium
D. Water vapours

Correct Answer: A. Dust particles

74. A weightless rubber balloon is filled with 200 c.c. of water. Its weight in water is equal to

A. 9.8/5 N
B. 9.8/10 N
C. 9.8/2 N
D. Zero

Correct Answer: D. Zero

75. A car is running on a road at a uniform speed of 60 km/h. The net resultant force on the car is

A. Driving force in the direction of motion
B. Resistance force opposite to motion
C. An inclined force
D. Equal to zero

Correct Answer: D. Equal to zero

76. Rainbow is produced when sunlight falls on drops of rain. The physical phenomena responsible for this are: (1) Dispersion, (2) Refraction, (3) Internal reflection

A. 1 & 2
B. 2 & 3
C. 1 & 3
D. All of the above

Correct Answer: D. All of the above

77. An artificial satellite orbiting around the earth does not fall down because the attraction of earth

A. does not exist at such distance
B. is neutralised by the attraction of the moon
C. provides the necessary speed for its steady motion
D. provides the necessary acceleration for its motion

Correct Answer: D. provides the necessary acceleration for its motion

Topic 8: Space & Astronomy

78. The origin of the Universe is around

A. 12.7 billion years ago
B. 13.7 billion years ago
C. 14.5 billion years ago
D. 14.7 billion years ago

Correct Answer: B. 13.7 billion years ago

79. Life in the Earth started from

A. DNA
B. Polypeptide
C. RNA
D. Conjugate protein

Correct Answer: C. RNA

80. The shortest day is

A. 22nd December
B. 15th June
C. 22nd January
D. 25th December

Correct Answer: A. 22nd December

81. Which one of the following planets is popularly known as the morning star?

A. Jupiter
B. Mars
C. Venus
D. Saturn

Correct Answer: C. Venus

82. Saturn is the _ planet from the sun

A. Sixth
B. Eighth
C. Fourth
D. Third

Correct Answer: A. Sixth

83. What is the Galileo Project?

A. An intercountry Program of missile shield developed by the U.S.A.
B. A project developed by India with assistance from Canada
C. An environmental protection project being developed by Japan
D. A multi satellite navigation project developed by the European Union

Correct Answer: D. A multi satellite navigation project developed by the European Union

84. NASA’s Deep Impact Space Mission was employed to take detailed pictures of which comet nucleus?

A. Halley’s comet
B. Hale-Bopp
C. Shoemaker-Levy
D. Tempel-1

Correct Answer: D. Tempel-1

85. Which one of the following is a space craft?

A. Apophis
B. Giotto
C. Vesta
D. Tech sar

Correct Answer: B. Giotto

Topic 9: Scientists & Discoveries

86. Who among the following scientists shared the Nobel prize in Physics with his son?

A. Max Planck
B. Albert Einstein
C. William Henry Bragg
D. Enrico Fermi

Correct Answer: C. William Henry Bragg

87. Sir C.V. Raman was awarded Nobel prize in the year

A. 1920
B. 1925
C. 1930
D. 1931

Correct Answer: C. 1930

88. David Bushnell is credited with the creating of

A. first submarine
B. Hovercraft
C. Steamship
D. Catamaran

Correct Answer: A. first submarine

89. Robert Webster is known for his work associated with

A. Cardiology
B. Influenza Virus
C. HIV/AIDS
D. Alzheimer

Correct Answer: B. Influenza Virus

90. D.D.T. was invented by

A. Paul Muller
B. La Mark
C. Pavlov
D. Darwin

Correct Answer: A. Paul Muller

Topic 10: Computer & Technology

91. Which one of the following laser types is used in a laser printer?

A. Dye laser
B. Gas laser
C. Semiconductor laser
D. Excimer laser

Correct Answer: C. Semiconductor laser

92. A term associated with comparison of processing speed

A. MPG
B. CPS
C. MIPS
D. None of the above

Correct Answer: C. MIPS

93. India’s ‘Silicon Valley’ is located in

A. Kerala
B. Tamil Nadu
C. Karnataka
D. Rajasthan

Correct Answer: C. Karnataka

94. ‘LASER Printers’ are an example of

A. Line printers
B. Dot-Matrix Printers
C. Page Printers
D. None of the above

Correct Answer: C. Page Printers

95. Encoder is a

A. Integrated circuit
B. Digital circuit
C. VLSI
D. IC chips

Correct Answer: B. Digital circuit

96. ISRO Launched its _ th satellite on 27th August, 2015

A. 20
B. 25
C. 24
D. 26

Correct Answer: C. 24

Topic 11: Earth & Geology

97. Artesian wells are found in which one of the following rocks?

A. Sedimentary
B. Metamorphic
C. Acquifer
D. Igneous

Correct Answer: A. Sedimentary

Topic 12: Miscellaneous

98. Which one of the following is printed on a commonly used fluorescent tube light?

A. 220K
B. 273K
C. 6500K
D. 9000K

Correct Answer: C. 6500K

99. Which one of the following sets of elements was primarily responsible for the origin of life on the Earth?

A. Hydrogen, Oxygen, Sodium
B. Carbon, Hydrogen, Nitrogen
C. Oxygen, Calcium, Phosphorus
D. Carbon, Hydrogen, Potassium

Correct Answer: B. Carbon, Hydrogen, Nitrogen

100. Which country will help India to set up Jayitapur Nuclear Power Station?

A. Russia
B. France
C. Germany
D. Canada

Correct Answer: B. France

TOPIC-WISE SUMMARY

Topic No.Topic NameQuestion Numbers
1Environmental Science & Pollution1-19
2Biology – Human Body & Health20-34
3Biology – Animals & Classification35-41
4Wildlife & Conservation42-44
5Biology – Cell & Genetics45-47
6Chemistry48-62
7Physics63-77
8Space & Astronomy78-85
9Scientists & Discoveries86-90
10Computer & Technology91-96
11Earth & Geology97
12Miscellaneous98-100