WBCS MAIN 2019 P- Science-Technology & EVS MCQ
WBCS MAIN 2019 P- Science-Technology & EVS One Liner
Topic 1: Environmental Science
1. In which country is rooftop water harvesting highest?
Ans: India
2. What is the noise level during plane take-off?
Ans: 150 dB
3. When was the Biodiversity Act passed?
Ans: 2002
4. When did the Bengal Smoke Nuisance Act come into effect?
Ans: 1905
5. When was the green bench in Kolkata High Court established?
Ans: 1996
6. Which waste comes under the red category?
Ans: Drug
7. What is the ideal temperature range for composting?
Ans: 50°C – 60°C
8. How do municipalities mostly disinfect drinking water?
Ans: Chlorination
9. What causes temporary hardness of water?
Ans: Bicarbonates
10. How is activated sludge treatment carried out?
Ans: By microbes
11. In which country was paper recycling initiated?
Ans: Germany
12. What is the electric arc furnace used for recycling?
Ans: Fe (Iron)
13. When did CITES become effective?
Ans: 1975
14. What does mulching prevent the loss of?
Ans: Moisture
15. When was the Indian Board of Wildlife established?
Ans: 1952
16. What is the Bhagabatpur project for breeding?
Ans: Marsh Crocodile
17. Which country has the maximum energy consumption in Asia?
Ans: China
18. What does an ecosystem consist of?
Ans: A biotic community and its non-living elements
19. What is an example of in-situ conservation?
Ans: Biosphere Reserve
20. What is the major cause of ozone depletion?
Ans: Chloro Fluoro Carbons
21. What is an incinerator?
Ans: Furnace used for burning solid waste
22. What is plankton?
Ans: Microscopic floating organisms (plants and animals)
23. Which is an abiotic factor?
Ans: Temperature
24. What is the most abundant greenhouse gas in the atmosphere?
Ans: Water vapour
25. What is the largest sink for carbon dioxide?
Ans: Oceans
26. What is a liquid form of aerosol?
Ans: Mist
27. What gas is released from X-ray films?
Ans: CO₂
28. Below which pH is rain regarded as acid rain?
Ans: 5.6
29. Which pollutant is the major contributor to photochemical smog?
Ans: Nitrogen dioxide
30. What is the primary standard level for carbon monoxide for air quality?
Ans: 9 ppm
31. What is the most abundant hydrocarbon in the atmosphere?
Ans: Methane
Topic 2: Chemistry
32. What is the unit of radioactivity?
Ans: Ci (Curie)
33. What are the negatively charged β particles emitted in radioactive decay?
Ans: Electrons produced as a result of the decay of neutrons inside the nucleus
34. What happens during gamma ray emission from a nucleus?
Ans: No change in proton number and neutron number
35. What gas is liberated when SiO₂ reacts with Sodium Carbonate?
Ans: CO₂
36. What is the oxidation state of Oxygen in F₂O?
Ans: +2
37. Which compound does not have a coordinate bond?
Ans: HNO₂
38. What is the homologue of ethyne?
Ans: C₃H₄
39. Which alcohol is used in alcoholic beverages?
Ans: Ethanol
40. Which electron configuration corresponds to the element with the highest ionisation energy?
Ans: 1s², 2s², 2p³ (Nitrogen)
41. What is the general molecular formula for a disaccharide?
Ans: C₁₂H₂₂O₁₁
42. Which plant is used for biodiesel?
Ans: Jatropha
Topic 3: Physics
43. How does the ratio v/i (resistance) for a metallic wire change with temperature?
Ans: Increases as temperature rises
44. How does the potential energy of a molecule on the liquid surface compare to one inside?
Ans: Greater
45. Which electromagnetic wave has the smallest wavelength?
Ans: γ-rays
46. What is the function of heavy water in a nuclear reactor?
Ans: To slow down the speed of neutrons
47. Which is not a part of the X-ray tube?
Ans: Geiger tube
48. Which statement about a floating body is incorrect?
Ans: Weight will be greater than buoyancy
49. What is the power of a 50W-200V bulb connected to 100V supply?
Ans: 12.5 W
50. What is the velocity below which flow remains streamline called?
Ans: Critical velocity
51. A bullet loses 50% velocity after penetrating 30 cm. What additional distance will it penetrate before coming to rest?
Ans: 10 cm
52. What is wrong about molecularity of a reaction?
Ans: It may be whole number or fractional
53. Which pair of physical quantities have different dimensions?
Ans: Moment of inertia and moment of a force
54. In which phenomenon do heat waves travel along straight lines at the speed of light?
Ans: Thermal radiation
55. What cannot occur during α or β decay?
Ans: Isotope of the original nucleus is produced
56. What type of material has a bandgap of 5.0 eV?
Ans: Insulator
57. What happens to atomic number during positron emission?
Ans: Decreased by 1 unit
58. Which hydrogen emission spectrum was discovered first and in which region?
Ans: Balmer, visible
59. What is the compressibility of an ideal fluid?
Ans: Infinity
60. Which element is used in cancer treatment?
Ans: Cobalt-60
61. What is the cheapest device for measuring flow/discharge rate?
Ans: Pitot tube
62. What is the shape of Earth’s orbit?
Ans: Ellipse with low eccentricity
63. What is the period of the solar sunspot cycle?
Ans: 11 years
64. What protects Earth from harmful solar radiation?
Ans: Atmosphere
65. What is the main energy generation process in the Sun?
Ans: Nuclear fusion
66. From which two gases do stars begin to form?
Ans: Hydrogen and Helium
67. Between which planets is the asteroid belt situated?
Ans: Mars and Jupiter
Topic 4: Biology
68. What vitamin does golden rice contain?
Ans: Vitamin A
69. From which organism was the gene transferred to create Bt cotton?
Ans: Bacteria
70. What is the largest gland in an adult human?
Ans: Liver
71. Which pair is correctly matched?
Ans: Apiculture – Honey bee
72. How is CO₂ mostly transported in blood?
Ans: As Bicarbonate
73. Where are Kupffer cells present?
Ans: Liver
74. Which vitamin is essential for blood clotting?
Ans: Vitamin K
75. Which is NOT vestigial in humans?
Ans: Nails
76. Where is indusium found?
Ans: Ferns
77. What process is responsible for water supply in plants?
Ans: Osmosis
78. In what form is food transported in plants?
Ans: Sucrose
79. What is the objective of developing Bt brinjal?
Ans: To make it pest-resistant
80. Which vitamin is water-soluble and an antioxidant?
Ans: Vitamin C
81. What causes adaptation of eyes to darkness?
Ans: Repletion of vision pigment in rods
82. A man with blood group A marries a woman with blood group AB. Which progeny would indicate the man is heterozygous?
Ans: B
83. What causes a permanent decrease in population?
Ans: Mortality
84. Who described the structure of the DNA double helix?
Ans: Watson and Crick
85. What is protein folding?
Ans: Process where a polypeptide folds into a 3-D structure
86. What contains all information required for polypeptide folding?
Ans: Amino acid sequences
87. Which RNA carries genetic information copied from DNA?
Ans: mRNA
88. What disease is caused by niacin deficiency?
Ans: Pellagra
89. Which vitamin serves as a hormone precursor?
Ans: Vitamin D
90. Which is NOT a component of the nucleus?
Ans: Cytoplasm
Topic 5: Computer & Information Technology
91. What does WAN hardware include?
Ans: Multiplexors and routers
92. What was the first search engine on the internet?
Ans: Archie
93. Which programming language is exclusively used for artificial intelligence?
Ans: Prolog
94. What is the storage capacity of a dual-layer Blu-ray disc?
Ans: 50 GB
95. What device do banks use to read numbers on cheques?
Ans: MICR
96. What is the wavelength of Super High Frequency (SHF) used in radar and satellite communication?
Ans: 1cm – 10cm
97. What is data transmitted for a given amount of time called?
Ans: Bandwidth
98. How is the picture signal modulated in TV transmission?
Ans: VSB (Vestigial Side Band)
99. What instrument is used to measure optical activity?
Ans: Polarimeter
100. What is India’s navigational satellite system called?
Ans: IRNSS (Indian Regional Navigation Satellite System)
TOPIC-WISE SUMMARY
| Topic No. | Topic Name | Question Numbers |
|---|---|---|
| 1 | Environmental Science | 1-31 |
| 2 | Chemistry | 32-42 |
| 3 | Physics | 43-67 |
| 4 | Biology | 68-90 |
| 5 | Computer & Information Technology | 91-100 |
WBCS MAIN 2019 P- Science-Technology & EVS MCQ
Topic 1: Environmental Science
1. Roof top water harvesting is highest in
A. China
B. Brazil
C. Ghana
D. India
Correct Answer: D. India
2. The noise level during plane take off is around
A. 100 dB
B. 150 dB
C. 200 dB
D. 250 dB
Correct Answer: B. 150 dB
3. The Biodiversity Act was passed in
A. 2000
B. 2002
C. 2004
D. 2008
Correct Answer: B. 2002
4. Bengal Smoke Nuisance Act came up for the first time in
A. 1900
B. 1905
C. 1950
D. 1978
Correct Answer: B. 1905
5. The green bench in Kolkata High Court was established in
A. 1990
B. 1996
C. 1997
D. 1998
Correct Answer: B. 1996
6. The following waste comes under red category:
A. metal
B. drug
C. oil waste
D. food waste
Correct Answer: B. drug
7. The ideal temperature for composting is
A. 30°C – 40°C
B. 40°C – 50°C
C. 50°C – 60°C
D. 60°C – 70°C
Correct Answer: C. 50°C – 60°C
8. The disinfection of drinking water by municipalities is mostly by
A. Chlorination
B. Bromination
C. Boiling
D. UV radiation
Correct Answer: A. Chlorination
9. The temporary hardness of water is caused by
A. Oxides
B. Bicarbonates
C. Chlorides
D. Sulphates
Correct Answer: B. Bicarbonates
10. The activated sludge treatment is carried out by
A. high temperature
B. acidification
C. microbes
D. moisture
Correct Answer: C. microbes
11. The country where paper recycling was initiated in the world is
A. UK
B. USA
C. Germany
D. France
Correct Answer: C. Germany
12. The electric arc furnace is used for recycling of
A. Cu
B. Zn
C. Fe
D. Cr
Correct Answer: C. Fe
13. CITES became effective from the year
A. 1970
B. 1975
C. 1980
D. 1985
Correct Answer: B. 1975
14. Mulching prevents the loss of
A. microbes
B. moisture
C. mineral
D. organic matter
Correct Answer: B. moisture
15. Indian Board of Wildlife was established in
A. 1932
B. 1952
C. 1962
D. 1972
Correct Answer: B. 1952
16. Bhagabatpur project is for breeding
A. Marsh Crocodile
B. Tigers
C. Black buck
D. Dholes
Correct Answer: A. Marsh Crocodile
17. Maximum energy consumption in Asia is by
A. India
B. China
C. Japan
D. Pakistan
Correct Answer: B. China
18. An ecosystem consists of
A. population.
B. a biotic community.
C. a population and its non-living elements.
D. a biotic community and its non-living elements.
Correct Answer: D. a biotic community and its non-living elements.
19. An example of an in-situ conservation is
A. Biosphere Reserve
B. Zoo
C. Botanical Garden
D. Seed Bank
Correct Answer: A. Biosphere Reserve
20. Major cause of Ozone depletion is due to which chemical?
A. Chloro Fluoro Carbons
B. Polyphenols
C. Dioxins
D. Rayon
Correct Answer: A. Chloro Fluoro Carbons
21. What is Incinerator?
A. Furnace used for burning solid waste.
B. Furnace used for treating liquid waste.
C. Both (A) and (B)
D. None of the above
Correct Answer: A. Furnace used for burning solid waste.
22. What is Plankton?
A. Large plants in water.
B. Microscopic floating organisms Plants and animals.
C. Bottom dwelling aquatic organisms
D. None of the above
Correct Answer: B. Microscopic floating organisms Plants and animals.
23. Which one of the following is an abiotic factor?
A. Temperature
B. Ant
C. Tree
D. Bacteria
Correct Answer: A. Temperature
24. Which is the most abundant greenhouse gas in the atmosphere?
A. Carbon dioxide
B. Water vapour
C. Methane
D. Nitrogen
Correct Answer: B. Water vapour
25. Which of the following is the largest sink for carbon dioxide gas?
A. Forests
B. Oceans
C. Ice sheets
D. Grasslands
Correct Answer: B. Oceans
26. Which of the following is a liquid form of aerosol?
A. Fume
B. Dust
C. Mist
D. Smoke
Correct Answer: C. Mist
27. X-ray films are a source of which of the following gas?
A. SO₂
B. CO₂
C. NO₂
D. SO₃
Correct Answer: B. CO₂
28. Below which of the following pH in rain regarded as ‘acid rain’?
A. 7
B. 7.3
C. 5.6
D. 6
Correct Answer: C. 5.6
29. Which of the following pollutant is the major contributor to photochemical smog?
A. Peroxynitrates
B. Hydroperoxides
C. Nitrogen dioxide
D. Ozone
Correct Answer: C. Nitrogen dioxide
30. What is the primary standard level for carbon monoxide for assuring air quality?
A. 10 ppm
B. 90 ppm
C. 1 ppm
D. 9 ppm
Correct Answer: D. 9 ppm
31. Which is the most abundant hydrocarbon in the atmosphere?
A. Methane
B. Carbonyl sulphide
C. Ethane
D. None of the above
Correct Answer: A. Methane
Topic 2: Chemistry
32. The unit of radioactivity is
A. Co
B. Ci
C. Cr
D. Cq
Correct Answer: B. Ci (Curie)
33. In radioactive decay process, the negatively charged emitted β particles are
A. the electrons present inside the nucleus.
B. the electrons produced as a result of the decay of neutrons inside the nucleus.
C. the electrons produced as a result of collisions between atoms.
D. None of the above
Correct Answer: B. the electrons produced as a result of the decay of neutrons inside the nucleus.
34. In gamma ray emission from a nucleus
A. only proton number changes.
B. only neutron number changes.
C. there is no change in the proton number and neutron number.
D. Both the proton number and the neutron number change.
Correct Answer: C. there is no change in the proton number and neutron number.
35. SiO₂ is reacted with Sodium Carbonate. What is the gas liberated?
A. CO₂
B. CO
C. O₂
D. O₃
Correct Answer: A. CO₂
36. Oxidation state of Oxygen in F₂O is
A. -1
B. +1
C. +2
D. -2
Correct Answer: C. +2
37. Which of the following does not have coordinate bond?
A. SO₂
B. HNO₂
C. HNO₃
D. H₂SO₃
Correct Answer: B. HNO₂
38. The homologue of ethyne is
A. C₂H₂
B. C₂H₆
C. C₃H₄
D. C₃H₈
Correct Answer: C. C₃H₄
39. Which is used in alcoholic beverages?
A. Ethanol
B. Methanol
C. Phenol
D. Glycerol
Correct Answer: A. Ethanol
40. Which of the following configurations corresponds to element of highest ionisation energy?
A. 1s², 2s¹
B. 1s², 2s², 2p³
C. 1s², 2s², 2p²
D. 1s², 2s², 2p⁶, 3s¹
Correct Answer: B. 1s², 2s², 2p³ (Nitrogen)
41. The general molecular formula for disaccharide is
A. C₁₀H₂₀O₁₀
B. C₁₂H₂₂O₁₁
C. C₁₂H₂₀O₁₀
D. C₁₂H₂₂O₁₀
Correct Answer: B. C₁₂H₂₂O₁₁
42. Which of the following is the bio-diesel plant?
A. Jatropha
B. Eucalyptus
C. Mango
D. Jackfruit
Correct Answer: A. Jatropha
Topic 3: Physics
43. For a metallic wire, the ratio v/i [v = applied potential difference and i = current flowing] is
A. independent of temperature.
B. increases as the temperature rises.
C. decreases as the temperature rises.
D. increases or decreases as the temperature rises depending upon the metal.
Correct Answer: B. increases as the temperature rises.
44. The potential energy of a molecule on the surface of a liquid compared to one inside the liquid is
A. zero
B. lesser
C. equal
D. greater
Correct Answer: D. greater
45. Which of the following electromagnetic waves have the smallest wavelength?
A. Infrared rays
B. UV rays
C. X-rays
D. γ-rays
Correct Answer: D. γ-rays
46. The function of heavy water in a nuclear reactor is to
A. cool down the reactor.
B. stop the nuclear reaction.
C. slow down the speed of neutrons.
D. increase the speed of neutrons.
Correct Answer: C. slow down the speed of neutrons.
47. Which one of the following is not a part of the X-ray tube?
A. Cathode
B. Anode
C. Tungsten target
D. Geiger tube
Correct Answer: D. Geiger tube
48. A body is floating in a liquid at rest. Incorrect statement about situation options:
A. Buoyancy is equal to weight of body.
B. Weight of liquid displaced by body is equal to buoyancy.
C. Force applied by body on liquid is buoyancy downward.
D. Weight will be greater than buoyancy.
Correct Answer: D. Weight will be greater than buoyancy.
49. An electric bulb marked as 50 W-200 V is connected across a 100 V supply. The present power of the bulb is
A. 37.5 W
B. 25 W
C. 12.5 W
D. 10 W
Correct Answer: C. 12.5 W
50. Water is flowing through a very narrow tube. The velocity of water below which the flow remains a streamline flow is known as
A. relative velocity
B. terminal velocity
C. critical velocity
D. particle velocity
Correct Answer: C. critical velocity
51. A bullet on penetrating 30 cm into its target loses its velocity by 50%. What additional distance will it penetrate into the target before it comes to rest?
A. 30 cm
B. 20 cm
C. 10 cm
D. 5 cm
Correct Answer: C. 10 cm
52. Which one of the following is wrong about molecularity of a reaction?
A. It may be whole number or fractional.
B. It is calculated from reaction mechanism.
C. It is the number of molecules of the reactants taking part in a single step chemical reaction.
D. It is always equal to the order of elementary reaction.
Correct Answer: A. It may be whole number or fractional.
53. In which of the following pairs, the two physical quantities have different dimensions?
A. Planck’s constant and angular momentum
B. Impulse and linear momentum
C. Moment of inertia and moment of a force
D. Energy and torque
Correct Answer: C. Moment of inertia and moment of a force
54. In which of the following phenomena, the heat waves travel along straight lines with the speed of light?
A. Thermal conduction
B. Forced convection
C. Natural convection
D. Thermal radiation
Correct Answer: D. Thermal radiation
55. For the radioactive nuclei that undergo either α or β decay, which one of the following cannot occur?
A. Isobar of original nucleus is produced.
B. Isotope of the original nucleus is produced.
C. Nuclei with higher atomic number than that of the original nucleus is produced.
D. Nuclei with lower atomic number than that of the original nucleus is produced.
Correct Answer: B. Isotope of the original nucleus is produced.
56. If the bandgap between valence band and conduction band in a material is 5.0 eV, then the material is
A. semiconductor
B. good conductor
C. super conductor
D. insulator
Correct Answer: D. insulator
57. During the emission of a positron from a nucleus, the mass number of the daughter element remains the same but the atomic number
A. is decreased by 1 unit
B. is decreased by 2 units
C. is increased by 1 unit
D. remains unchanged
Correct Answer: A. is decreased by 1 unit
58. The emission spectrum of hydrogen discovered first and the region of the electromagnetic spectrum in which it belongs, respectively are
A. Lyman, ultraviolet
B. Lyman, visible
C. Balmer, ultraviolet
D. Balmer, visible
Correct Answer: D. Balmer, visible
59. The value of the compressibility of an ideal fluid is
A. zero
B. unity
C. infinity
D. more than that of a real fluid
Correct Answer: C. infinity
60. Which of the following elements is used in the treatment of cancer?
A. Cobalt-60
B. Iodine-131
C. Uranium-235
D. Plutonium-239
Correct Answer: A. Cobalt-60
61. Which is the cheapest device for measuring flow/discharge rate?
A. Venturimeter
B. Pitot tube
C. Orificimeter
D. None of the above
Correct Answer: B. Pitot tube
62. What is the shape of Earth’s orbit?
A. Ellipse with high eccentricity
B. Ellipse with low eccentricity
C. Circle
D. None of the above
Correct Answer: B. Ellipse with low eccentricity
63. The solar sunspot cycle is
A. 3 years
B. 7 years
C. 11 years
D. 14 years
Correct Answer: C. 11 years
64. What property of Earth protects us from harmful radiation from the Sun?
A. Trees
B. Atmosphere
C. 70% water
D. Earth’s motion around the Sun
Correct Answer: B. Atmosphere
65. What is the main energy generation process in the Sun?
A. Nuclear fission
B. Nuclear radioactive decay
C. Gravitational energy
D. Nuclear fusion
Correct Answer: D. Nuclear fusion
66. Formation of stars begin from the following two gases:
A. Hydrogen and Nitrogen
B. Nitrogen and Oxygen
C. Oxygen and Hydrogen
D. Hydrogen and Helium
Correct Answer: D. Hydrogen and Helium
67. Asteroid belt is situated between the orbit of
A. Mercury and Venus
B. Mars and Jupiter
C. Jupiter and Saturn
D. Uranus and Neptune
Correct Answer: B. Mars and Jupiter
Topic 4: Biology
68. The golden rice contains
A. Vitamin A
B. Vitamin C
C. Vitamin E
D. Vitamin D
Correct Answer: A. Vitamin A
69. The Bt cotton is a transgenic crop with gene transfer from
A. virus
B. bacteria
C. fungi
D. algae
Correct Answer: B. bacteria
70. Which of the following is the largest gland in an adult man?
A. Thymus
B. Liver
C. Thyroid
D. Pancreas
Correct Answer: B. Liver
71. Which is correctly matched?
A. Apiculture – Honey bee
B. Pisciculture – Silk moth
C. Sericulture – Fish
D. Aquaculture – Mosquito
Correct Answer: A. Apiculture – Honey bee
72. In blood, CO₂ is transported majorly as
A. CO₂ as such
B. Sodium Carbonate
C. Bicarbonate
D. Carboxy haemoglobin
Correct Answer: C. Bicarbonate
73. Kupffer cells are present in
A. Pancreas
B. Liver
C. Thyroid
D. Small intestine
Correct Answer: B. Liver
74. The vitamin which is essential for blood clotting is
A. Vitamin – A
B. Vitamin – B
C. Vitamin – C
D. Vitamin – K
Correct Answer: D. Vitamin – K
75. Which of the following is not vestigial in man?
A. Tail vertebrae
B. Nails
C. Nictitating membrane
D. Vermiform appendix
Correct Answer: B. Nails
76. Indusium is found in
A. algae
B. moss
C. ferns
D. cycas
Correct Answer: C. ferns
77. In plants, water supply is due to
A. osmosis
B. imbibition
C. guttation
D. adhesion force
Correct Answer: A. osmosis
78. In which form does the food transported in plants?
A. Sucrose
B. Fructose
C. Glucose
D. Lactose
Correct Answer: A. Sucrose
79. A genetically engineered form of brinjal, known as the Bt-brinjal, has been developed, the objective of this is
A. to improve its taste and nutritive qualities.
B. to make it pest-resistant.
C. to make it drought-resistant.
D. to make its shelf-life longer.
Correct Answer: B. to make it pest-resistant.
80. Which of the following vitamin is water soluble as well as an antioxidant?
A. Vitamin-B
B. Vitamin-A
C. Vitamin-D
D. Vitamin-C
Correct Answer: D. Vitamin-C
81. Adaptation of eyes in dark due to
A. depletion of vision pigment in rods
B. depletion of vision pigment in cones
C. repletion of vision pigment in rods
D. repletion of vision pigment in cones
Correct Answer: C. repletion of vision pigment in rods
82. A man of blood group-A marries a woman of blood group-AB, which type of progeny would indicate that man is heterozygous?
A. O
B. B
C. A
D. AB
Correct Answer: B. B
83. The permanent decrease in population number occurs due to
A. Migration
B. Natality
C. Emigration
D. Mortality
Correct Answer: D. Mortality
84. Who described the structure of DNA double helix?
A. Peter Mitchell
B. Andre Jagendorf
C. Ernest Uribe
D. Watson and Crick
Correct Answer: D. Watson and Crick
85. Protein folding is a process in which a polypeptide folds into
A. 2-D structure
B. Globular form
C. 3-D structure
D. Linear form
Correct Answer: C. 3-D structure
86. Which of them contains all the information required to fold the polypeptide chain in its 3-D structure?
A. DNA sequences
B. RNA
C. Histone protein
D. Amino acid sequences
Correct Answer: D. Amino acid sequences
87. Name the RNA molecules which is used to carry genetic information copied from DNA?
A. tRNA
B. mRNA
C. rRNA
D. snRNA
Correct Answer: B. mRNA
88. Name the disease caused by the deficiency of Niacin.
A. Pellagra
B. Rickets
C. Scurvy
D. Pernicious anemia
Correct Answer: A. Pellagra
89. Which of the following vitamin serves as a hormone precursor?
A. Vitamin – C
B. Vitamin – A
C. Vitamin – K
D. Vitamin – D
Correct Answer: D. Vitamin – D
90. Which of the following is not a component of the nucleus?
A. Chromosome
B. Nucleolus
C. Cytoplasm
D. Nuclear envelope
Correct Answer: C. Cytoplasm
Topic 5: Computer & Information Technology
91. WAN hardware includes
A. Multiplexors and routers
B. EDF
C. Bridger and modems
D. Removable disc
Correct Answer: A. Multiplexors and routers
92. Which one is the first search engine in internet?
A. Google
B. Archie
C. Altavista
D. WAIS
Correct Answer: B. Archie
93. Which one programming language is exclusively used for artificial intelligence?
A. C
B. Java
C. J2EE
D. Prolog
Correct Answer: D. Prolog
94. A dual layer Blue-ray disc can store data upto
A. 20 GB
B. 30 GB
C. 40 GB
D. 50 GB
Correct Answer: D. 50 GB
95. The device used by Banks to automatically read those special numbers on the bottom of the cheques is
A. MICR
B. OMR
C. UPC
D. UDIC
Correct Answer: A. MICR
96. What is the wavelength of Super High Frequency (SHF) especially used in radar and satellite communication?
A. 1m – 10m
B. 1cm – 10cm
C. 10cm – 1m
D. 0.1cm – 1cm
Correct Answer: B. 1cm – 10cm
97. Data transmitted for a given amount of time is called
A. Noise
B. Power
C. Frequency
D. Bandwidth
Correct Answer: D. Bandwidth
98. In TV transmission, picture signal is __ modulated.
A. DSB-SC
B. VSB
C. SSB-SC
D. Pulse
Correct Answer: B. VSB (Vestigial Side Band)
99. Which are used to measure optical activity?
A. Polarimeter
B. Planometer
C. Psychrometer
D. Photometer
Correct Answer: A. Polarimeter
100. India’s navigational satellite system is known as
A. GPS
B. GLONASS
C. BeiDou
D. IRNSS
Correct Answer: D. IRNSS (Indian Regional Navigation Satellite System)
TOPIC-WISE SUMMARY
| Topic No. | Topic Name | Question Numbers |
|---|---|---|
| 1 | Environmental Science | 1-31 |
| 2 | Chemistry | 32-42 |
| 3 | Physics | 43-67 |
| 4 | Biology | 68-90 |
| 5 | Computer & Information Technology | 91-100 |