Science MCQs, Everyday Science MCQs with Answers, MCQS for PPSC, FPSC, NTS, ETEA and Others Latest MCQs
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1. The Sun’s mass is mainly consist of
(A) carbon dioxide
(B) helium
(C) hydrogen
(D) nitrogen
2. What divides the Earth into the Northern and the Southern Hemispheres?
(A) Equator
(B) Axis of rotation
C) North Pole
(D) South Pole
3. Ozone protects the Earth from harmful ultraviolet radiations from the Sun. The chemical formula of ozone is
(A) O
(B) O2
(C) O3
(D) O4
4. Long-sight defect could be corrected by using _______ lens.
(A) convex
(B) concave
(C) diverging
(D) plane
5. Deficiency of Vitamin-A results in
(A) hair fall
(B) rickets
(C) night blindness
(D) scurvy
6. For a fixed mass of gas at constant temperature, if we decrease volume, the pressure will
(A) increase
(B) remains constant
(C) also decrease
(D) none of these
7. The lifespan of Red Blood Cells is __________ days.
(A) 240
(B) 180
(C) 120
(D) 60
8. The density of water is
(A) 1 g/cm3
(B) 2 g/cm3
(C) 1.5 g/cm3
(D) none of these
9. Radioactivity was discovered by
(A) Ernest Rutherford
(B) J. J. Thomson
(C) Lord Kelvin
(D) Henri Becquerel
10. A device which converts chemical energy into electrical energy is called
(A) moving-coil meter
(B) generator
(C) motor
(D) battery
11. The Sun’s mass is mainly consist of hydrogen (about 73%). The second main constituent (about 25%) is
(A) nitrogen
(B) carbon dioxide
(C) helium
(D) hydrogen
12. The average adult has a blood volume of about __________ liters.
(A) 7
(B) 6
(C) 5
(D) 4
13. The most abundant element in the universe is
(A) Carbon Dioxide
(B) Hydrogen
(C) Oxygen
(D) Silicon
14. The most abundant element in the Earth’s crust is
(A) Silicon
(B) Hydrogen
(C) Oxygen
(D) Carbon Dioxide
15. Each day human body breathe in __________ liters of air.
(A) 5,000 to 10,000
(B) 10,000 to 15,000
(C) 15,000 to 20,000
(D) 20,000 to 25,000
16. Deficiency of Vitamin-D results in
(A) hair fall
(B) rickets
(C) night blindness
(D) scurvy
17. The SI unit of “pressure” is
(A) tesla
(B) joule
(C) henry
(D) pascal
18. The most densest substance on the Earth is
(A) Copper
(B) Osmium
(C) Steel
(D) Platinum
19. A camera uses a __________ to form an image.
(A) condenser lens
(B) concave lens
(C) convex lens
(D) none of these
20. Which from the following is NOT a conductor?
(A) Aluminium
(B) Graphite
(C) Silicon
(D) All are conductors
21. CNG stands for
(A) Conducted Natural Gas
(B) Conduced Natural Gas
(C) Converted Natural Gas
(D) Compressed Natural Gas
22. Which from the following is true for “Sound”?
(A) Sound cannot travel through gases
(B) Sound cannot travel through a vacuum
(C) Sound cannot travel through liquids
(D) Sound cannot travel through gases
23. When white light is passed through a prism, it splits into _______ colours.
(A) 5
(B) 6
(C) 7
(D) 8
24. 1 nanometer = ?
(A) 10–3 meter
(B) 10–6 meter
(C) 10–9 meter
(D) 10–12 meter
25. Instrument used for measuring very high temperature is
(A) Pyrometer
(B) Pyroscope
(C) Xylometer
(D) Seismograph
26. Sound waves are _________ waves.
(A) Electromagnetic
(B) Transverse
(C) Longitudinal
(D) none of these
27. The lifespan of White Blood Cells is __________ day(s).
(A) 1
(B) 2
(C) 3
(D) 4
28. The fluid part of blood is known as
(A) blood cells
(B) hormones
(C) plasma
(D) platelets
29. X-rays were discovered by
(A) Bacquerel
(B) Rutherford
(C) Thomson
(D) Rontgen
30. The speed of light is
(A) 280,000 km/s
(B) 300,000 km/s
(C) 320,000 km/s
(D) none of these
31. During winter in cold countries, the __________ is mixed to melt the ice on the icy roads.
(A) Carbon dioxide
(B) Chlorine
(C) Salt
(D) Water
32. In a very low temperature which from the following will freeze at last?
(A) Canal water
(B) River water
(C) Water in a lake
(D) Sea water
33. The nearest planet to the Earth is
(A) Mars
(B) Mercury
(C) Venus
(D) Moon
34. The planet that moves round the Sun at the highest speed is
(A) Venus
(B) Mercury
(C) Mars
(D) Jupiter
35. In general, Comets have __________ orbits.
(A) Highly elliptical
(B) Elliptical
(C) Parabolic
(D) Circular
36. GPS is an abbreviation for
(A) Global Positioning System
(B) Global Poles System
(C) Global PolySiliconium Store
(D) Global Position Structure
37. Oxidation is a chemical reaction involving the
(A) Gain of Electrons
(B) Loss of Protons
(C) Gain of Protons
(D) Loss of Electrons
38. At night, Plants intake __________ and release __________.
(A) Oxygen, Carbon monoxide
(B) Carbon dioxide, Oxygen
(C) Oxygen, Carbon dioxide
(D) Carbon monoxide, Oxygen
39. Urine is produced in
(A) Kidneys
(B) Large intestine
(C) Lungs
(D) Liver
40. Blood is cleaned by
(A) Heart
(B) Liver
(C) Lungs
(D) Kidneys
41. The position of an element in the Periodic Table is determined by its __________ number.
(A) Electron
(B) Positron
(C) Neutron
(D) Proton
42. The salinity of sea water is determined by the amount of common salt (Sodium Chloride) in _______ of sea water.
(A) 1 gram
(B) 10 grams
(C) 1 kg
(D) 10 kg
43. The planet which is easily visible from the Earth is
(A) Jupiter
(B) Venus
(C) Mars
(D) Mercury
44. In the solar system, the Great Spot is on the planet
(A) Mars
(B) Venus
(C) Jupiter
(D) Saturn
45. The Great Spot is a
(A) Desert
(B) Frozen Carbon dioxide
(C) Mountain
(D) Storm
46. The bodyguard of the Earth is __________ that save the Earth from many Comets and Asteroids.
(A) Jupiter
(B) Saturn
(C) Mars
(D) Uranus
47. 1 light year =
(A) 9.5×106 km
(B) 9.5×109 km
(C) 9.5×1012 km
(D) 9.5×1018 km
48. The planets visible to us without using a telescope are
(A) 3
(B) 4
(C) 5
(D) 6
49. According to Big Bang Theory, the Universe began about __________ billion years ago.
(A) 10 – 20
(B) 20 – 30
(C) 30 – 40
(D) 40 – 50
50. Biosensor is used to measure?
(A) Amount of hemoglobin
(B) Blood glucose level
(C) The body pH value
(D) Salinity in Urine
51. Einstein’s famous equation which states that mass and energy are interchangeable is
(A) E = mc2
(B) E = cm2
(C) M = ec2
(D) M = ce2
52. The SI unit of electric current is
(A) Coulomb
(B) Volt
(C) Ampere
(D) Watt
53. The principal constituent of the atmosphere of the Earth is
(A) Carbon
(B) Oxygen
(C) Hydrogen
(D) Nitrogen
54. What is Dry Ice?
(A) Solid Carbon Dioxide
(B) Solid Nitrogen
(C) Solid Hydrogen
(D) Solid Oxygen
55. Which are the three primary colours?
(A) Red, Yellow, Blue
(B) White, Black, Blue
(C) Red, Orange, Blue
(D) Red, Green, Blue
56. Digestion of food is completed in the
(A) stomach
(B) large intestine
(C) small intestine
(D) Liver
57. Carrot is good source of vitamin
(A) A
(B) B complex
(C) C
(D) D
58. For proper formation of teeth, __________ is essential.
(A) copper
(B) fluorine
(C) iodine
(D) iron
59. Deficiency of __________ causes loss of appetite and poor growth.
(A) zinc
(B) copper
(C) iodine
(D) iron
60. Meteorology is the study of?
(A) air and sounds
(B) atmosphere
(C) seasons
(D) winds and clouds
61. The Carbon Dioxide in the atmosphere, by volume, is
(A) 0.039%
(B) 3.9%
(C) 13%
(D) 30%
62. Diamond is an allotropic form of
(A) Nitrogen
(B) Hydrogen
(C) Carbon
(D) Silicon
63. The SI unit of Heat is
(A) Watt
(B) Joule
(C) Volt
(D) Newton
64. The good sources of Vitamin-A are
(A) green leafy vegetables
(B) seeds
(C) fresh vegetables and fruits
(D) sea foods
65. The good sources of Vitamin-B Complex are
(A) fresh vegetables and fruits
(B) seeds
(C) green leafy vegetables
(D) sea foods
66. The good sources of Vitamin-C are
(A) seeds
(B) green leafy vegetables
(C) fresh vegetables and fruits
(D) sea foods
67. The good sources of iodine are
(A) sea foods
(B) seeds
(C) fresh vegetables and fruits
(D) green leafy vegetables
68. The gas, commonly known as “laughing gas”, is
(A) Cabon Dioxide
(B) Nitrous Oxide
(C) Sulfur Dioxide
(D) Sodium Oxide
69. The source of oxygen in photosynthesis is
(A) glucose
(B) salts
(C) minerals
(D) water
70. The instrument used to measure wind speed is
(A) Barometer
(B) Anemometer
(C) Hydrometer
(D) Hygrometer
71. The natural fats and oils are composed of
(A) Carbon, Hydrogen and Nitrogen
(B) Hydrogen, Oxygen and Nitrogen
(C) Carbon, Oxygen and Nitrogen
(D) Carbon, Hydrogen and Oxygen
72. The energy value of food is measured in
(A) Calories
(B) Joule
(C) Tesla
(D) Proteins
73. Wind energy is the __________ energy.
(A) Kinetic
(B) Transverse
(C) Potential
(D) Mechanical
74. Who is considered the founder of meteorology?
(A) Aristotle
(B) Einstein
(C) Plato
(D) Newton
75. Water covers __________ of the Earth’s surface.
(A) 60%
(B) 65%
(C) 70%
(D) 75%
76. In general, wind speed of 105–137 km/h cause
(A) extreme damage
(B) considerable damage
(C) severe damage
(D) minor or no damage
77. Acid rain is mainly caused by emissions of __________ in the atmosphere.
(A) Nitrogen Oxide and Potassium Nitrate
(B) Sulfur and Charcoal
(C) Sulfur Dioxide and Potassium Nitrate
(D) Sulfur Dioxide and Nitrogen Oxide
78. About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is
(A) Clay
(B) Carbon Dioxide
(C) Silicon
(D) Oxygen
79. The fourth state of matter is
(A) Plasma
(B) Salts
(C) Vapours
(D) Water
80. The device used to convert Alternate Current into Direct Current is called
(A) Battery
(B) Anemometer
(C) Galvanometer
(D) Rectifier
81. In night, when photosynthesis is stopped, plants
(A) give off Oxygen
(B) take in Carbon Dioxide
(C) give off Carbon Dioxide
(D) take in Oxygen
82. During photosynthesis, plants
(A) give off Carbon Dioxide
(B) take in Oxygen
(C) take in Carbon Dioxide
(D) give off Oxygen
83. __________ are called the powerhouses of the cell.
(A) Mitochondria
(B) Lungs
(C) Vesicles
(D) Liver
84. Mitochondria contain their own supply of
(A) Oxygen
(B) Amino acids
(C) Vitamins
(D) DNA
85. The first chemical explosive, Gunpowder, is a mixture of
(A) Sulfur, Charcoal and Nitrogen Oxide
(B) Nitrate Sulfur and Charcoal
(C) Sulfur, Charcoal, and Potassium Nitrate
(D) Charcoal and Potassium
86. The number of oscillations per second is called the
(A) pitch
(B) waves
(C) hertz
(D) frequency
87. Sound waves from a loudspeaker are caused by
(A) amplitude
(B) vibrations
(C) pitch
(D) frequency
88. The guitar has __________ strings.
(A) 4
(B) 5
(C) 6
(D) 7
89. The device used to measure movements of the heart is
(A) Hygrometer
(B) Seismograph
(C) Hydrometer
(D) Cardiograph
90. The unit used to measure ‘Pressure’ is
(A) pascal
(B) newton
(C) watt
(D) tesla
91. There are __________ methods of heat transfer.
(A) 3
(B) 4
(C) 5
(D) 6
92. Which from the following is NOT a method of heat transfer?
(A) Radiation
(B) Convection
(C) Conduction
(D) All are methods of heat transfer
93. If we heat one end of metallic rod, the other end gets hot. The method of heat transfer is
(A) Radiation
(B) Convection
(C) Conduction
(D) None of these
94. A person seated in front of a fire receives heat by
(A) Radiation
(B) Convection
(C) Conduction
(D) None of these
95. The unit used to measure ‘magnetic flux’ is
(A) farad
(B) pascal
(C) weber
(D) henry
96. Battery was invented by
(A) Hero
(B) Volta
(C) Fermi
(D) Maiman
97. The most abundant element in the earth’s crust is oxygen. The second most abundant element in the earth’s crust is
(A) Brass
(B) Silicon
(C) Nitrogen
(D) Hydrogen
98. The nearest planet to the Sun is
(A) Mercury
(B) Jupiter
(C) Mars
(D) Venus
99. Bronze is an alloy of
(A) Iron, Carbon
(B) Mercury, Lead
(C) Nickel, Zinc
(D) Copper, Tin
100. Molecules with identical molecular formulae but with different structural formulae are called
(A) Isotopes
(B) Isomers
(C) Electrode
(D) Compound
Science MCQs, Everyday Science MCQs with Answers, MCQS for PPSC, FPSC, NTS, ETEA and Others Latest MCQs