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PPSC Science Past Papers  MCQs 2022

1. The rear view mirror used in the vehicles is _____?

(A) Parabolic mirror


(B) Plane mirror


(C) Concave mirror


(D) Convex mirror




2. Who was the Last viceroy of India after independence?

(A) Warren Hasting


(B) Lord Canning


(C) Lord Mountbatten


(D) Lord Curzon




3. How many bones in human body?

(A) 200


(B) 206


(C) 270


(D) 300




4. What is the chemical name of limestone?

(A) Sodium Bicarbonate


(B) Calcium carbonate


(C) Gypsum


(D) Limestone carbonate




5. Who invented Telephone?

(A) Thomas Edison


(B) Nikola Tesla


(C) Alexander Graham Bell


(D) None of these




6. Second highest layer of Earth’s atmosphere is _______?

(A) Troposphere


(B) Stratosphere


(C) Mesosphere


(D) Thermosphere




7. Which is the largest natural fresh water lake of Pakistan?

(A) Kaghan lake


(B) Satpara lake


(C) Manchhar Lake


(D) None of these




8. What is the chemical formula of Washing Soda?

(A) NaHCO₃


(B) Na₂SO₃


(C) Na₂CO₃


(D) None of these




9. Ozone layer protect us from the harmful _______ of the Sun.

(A) Heat


(B) Cold


(C) Ultraviolet rays


(D) None of these




10. What is the S.I unit of temperature?

(A) Kelvin


(B) Centigrade


(C) Fahrenheit


(D) None of these




11. The most abundant gas in the earth’s atmosphere by volume is _____?

(A) Nitrogen


(B) Oxygen


(C) Argon


(D) None of these




12. Which is the outermost planet in the solar system?

(A) Neptune


(B) Pluto


(C) Uranus


(D) Both A and B




13. Which of the following gases is commonly used as a refrigerant in domestic refrigerators for cooling?

(A) Freon/ammonia


(B) Neon


(C) Spirit


(D) None of these




14. Cooking gas is mixture of ______?

(A) Butane and Nitrogen


(B) Propane and Butane


(C) Carbon and Propane


(D) None of these




15. The most abundant element in the universe is called?

(A) Oxygen


(B) Helium


(C) Hydrogen


(D) None of these




16. The symbol of element Copper is?

(A) Ag


(B) Cu


(C) He


(D) Ne




17. Sunlight is a good source of vitamin ____?

(A) D


(B) A


(C) B


(D) C




18. Which gas is used in the electric bulb?

(A) Argon


(B) Silver


(C) Mercury


(D) Sodium




19. Which organism is known as the powerhouse of the cell?

(A) Organ powerhouse


(B) Cell membrane


(C) Cytoplasm


(D) Mitochondria




20. Solar system was discovered by _____?

(A) Copernicus


(B) Newton


(C) Galileo


(D) Kepler




21. Which of the following is used in fire extinguishers?

(A) Carbon sulphite


(B) Carbon monoxide


(C) Carbon dioxide


(D) None of these




22. What is the world’s largest living mammal?

(A) Blue Whale


(B) Fish


(C) Turtle


(D) None of these




23. The normal temperature of human body is _________ degree Fahrenheit.

(A) 90.8°F


(B) 37.5°F


(C) 98.6°F


(D) None of these




24. Which of the following gas mainly responsible for ozone layer depletion?

(A) Chlorofluorocarbon


(B) CO2


(C) Nitrogen oxide


(D) Sulphur dioxide




25. Quaid-e-Azam Mausoleum is located in which city?

(A) Karachi


(B) Ziarat


(C) Lahore


(D) Quetta




26. The only elemental metal that is liquid at room temperature is ______?

(A) Lead


(B) Zinc


(C) Mercury


(D) Aluminum




27. Meteorology is the science of _____?

(A) Space


(B) Weather and Climate


(C) Earthquake


(D) None of these




28. Meteorology is study of _____?

(A) Seasons


(B) Atmosphere


(C) Air and sounds


(D) Winds and clouds




29. What type of acid is used in car batteries?

(A) Hydrochloric acid


(B) Hydrofluoric acid


(C) Nitric acid


(D) Sulphuric acid




30. Special theory of relativity was given by ___?

(A) Newton


(B) Albert Einstein


(C) Darwan


(D) None of these




31. A universal donor has the blood group _____?

(A) B


(B) O-


(C) AB


(D) A




32. The process of movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane is called ________?

(A) Induction


(B) Transportation


(C) Conduction


(D) Osmosis




33. The most abundant element in earth crust is _____?

(A) Carbon Dioxide


(B) Ozone


(C) Oxygen


(D) None of these




34. Joule is the unit of ______?

(A) Joule


(B) Energy/Heat


(C) Work


(D) None of these




35. Hemodialysis means cleaning of ______?

(A) Veins


(B) Blood


(C) Nerves


(D) None of these




36. Which of following is used to measure the distance between planet and stars?

(A) Light year


(B) Staller mile


(C) Centimeter


(D) None of these




37. An alloy used in making heating elements for electric heating devices (electric heater) is ______?

(A) Chromium


(B) Graphite


(C) Tungsten


(D) Nichrome




38. Who discovered Penicillin?

(A) F Jacksin


(B) Einstein


(C) A. Fleming


(D) J. Iqbal




39. Which resources are non-renewable?

(A) Geo thermal


(B) Fossil fuels


(C) Solar


(D) None of these




40. The steam-engine was invented ____?

(A) Thomas Savery


(B) Wilson


(C) James Chadwick


(D) None of these




41. Humans have ______ pairs of chromosomes.

(A) 20 pairs


(B) 40 pairs


(C) 23 pairs


(D) None of these




42. The average adult has a blood volume of about ___ liters.

(A) 6


(B) 4


(C) 8


(D) 5




43. Bauxite is an ore of _____?

(A) Steel


(B) Iron


(C) Aluminum


(D) Copper




44. Bronze is an alloy of _____?

(A) Copper and Nikal


(B) Copper and Tin


(C) Copper and Steel


(D) None of these




45. Soap and detergents remove the dirt from clothes due to ______?

(A) Capillary action


(B) Osmosis


(C) Diffusion


(D) Lowering of inter-facial tension




46. Who discovered the circulation of blood?

(A) Parker


(B) William Harvey


(C) Mendel


(D) Newton




47. What is the escape of water molecules from surface called?

(A) Evaporation


(B) Condensation


(C) Crystallization


(D) None of these




48. Kidney stones are formed by which element?

(A) Calcium


(B) Calcium oxalate


(C) Potassium


(D) None of these




49. Loud speaker voice is increased due to _____?

(A) High frequency


(B) High energy


(C) Spectrum technology


(D) None of these




50. Nitrogenous wastes excreted through urine in humans is _____?

(A) Uric Acid


(B) Ammonia


(C) Urea


(D) None of these




51. The luminous body emits _____?

(A) Waves


(B) Light


(C) Energy


(D) None of these




52. Which mushroom is not edible?

(A) Amanita phalloides


(B) Oyster mushroom


(C) Straw mushroom


(D) None of these




53. Who invented dynamite?

(A) Dr. Alfred B. Nobel


(B) H. W. Seeley


(C) Lionel Lukin


(D) Roger Bacon




54. In the manufacture of banaspati ghee, the gas used is _____?

(A) Helium


(B) Hydrogen


(C) Oxygen


(D) None of these




55. What is the cause of rainbow?

(A) Rain drops


(B) Clouds


(C) Dust particle


(D) All of these




56. The speed of electromagnetic rays as compared to speed of light is ______?

(A) Same as speed of light


(B) More than speed of light


(C) Less than speed of light


(D) None of these




57. Study of sports effect on society is called _____?

(A) Sport Sociology


(B) Sport Psychology


(C) Sport Society


(D) None of these




58. The soil maturity color of northeastern areas is ______?

(A) Grey


(B) Reddish


(C) Dark Brown


(D) None of these




59. A ball is thrown vertically upwards. The acceleration due to gravity _____?

(A) 0.7 m/s² Vertical


(B) 9.8 m/s² Downward


(C) 9.8 m/s² Upward


(D) None of these




60. Which of the following mass wasting phenomenon could a person outrun?

(A) A person could not outrun any of these phenomena


(B) Creep


(C) Avalanche


(D) None of these




61. Which sea has no coasts?

(A) Dead Sea


(B) Sargasso Sea


(C) Red Sea


(D) None of these




62. Haematite is the ore of _____?

(A) Mercury


(B) Aluminum


(C) Iron


(D) Copper




63. In human body, most of the cholesterol is synthesized in _____?

(A) Small intestine


(B) Liver


(C) Kidney


(D) Large intestine




64. Smallest planet of solar system is _____?

(A) Mars


(B) Mercury


(C) Pluto


(D) Venus




65. Which is the most abundant element by mass in the human body?

(A) Oxygen


(B) Carbon


(C) Hydrogen


(D) Nitrogen




66. Which vitamin is generally excreted by humans in urine?

(A) Vitamin A


(B) Vitamin D


(C) Vitamin C


(D) Vitamin K




67. A natural habitat of a plant is called ____?

(A) Sanctuary


(B) Niche


(C) Biome


(D) Habitat




68. All of the following are biodegradable except:

(A) Cotton


(B) Wool


(C) Nylon


(D) Silk




69. Which instrument is used to measure the speed of wind?

(A) Odometer


(B) Anemometer


(C) Ammeter


(D) Barometer




70. The part of the brain which controls the thinking is _____?

(A) Cerebrum


(B) Cerebellum


(C) Pituitary gland


(D) None of these




71. Saliva helps in the digestion of _____?

(A) Fats


(B) Proteins


(C) Starch


(D) Vitamins




72. Plants absorb dissolved nitrates from soil and convert them into:

(A) Free nitrogen


(B) Ammonia


(C) Proteins


(D) Urea




73. Which gas is commonly used in balloons?

(A) Helium


(B) Hydrogen


(C) Oxygen


(D) Nitrogen




74. Most commonly used bleaching agent is _____?

(A) Alcohol


(B) Chlorine


(C) Carbon dioxide


(D) Sodium chloride




75. Which branch of biology deals with the study of heredity and variation?

(A) Anatomy


(B) Genetics


(C) Physiology


(D) Taxonomy




76. Who gave the first picture of the cell?

(A) Leuwenhoek


(B) Robert Hooke


(C) Robert Brown


(D) Schwann




77. The main constituent of biogas is _____?

(A) Methane


(B) Propane


(C) Ethane


(D) Butane




78. Most important stimulant in tea leaves is _____?

(A) Nicotine


(B) Caffeine


(C) Morphine


(D) Tannin




79. The animal which changes its sex is _____?

(A) Chameleon


(B) Hyena


(C) Snail


(D) Crocodile




80. Which is the warmest planet of the solar system?

(A) Mercury


(B) Venus


(C) Jupiter


(D) Saturn




81. Which metal is liquid at room temperature?

(A) Sodium


(B) Mercury


(C) Potassium


(D) Aluminum




82. Which vitamin is essential for blood clotting?

(A) Vitamin A


(B) Vitamin B


(C) Vitamin D


(D) Vitamin K




83. Which is the fastest planet in the solar system?

(A) Mercury


(B) Mars


(C) Jupiter


(D) Saturn




84. Which planet is known as the Earth’s twin?

(A) Venus


(B) Mars


(C) Mercury


(D) Jupiter




85. Which blood group is known as the universal donor?

(A) A


(B) B


(C) AB


(D) O




86. Which is the hardest natural substance on Earth?

(A) Iron


(B) Diamond


(C) Quartz


(D) Platinum




87. Which is the largest gland in the human body?

(A) Kidney


(B) Pancreas


(C) Liver


(D) Thyroid




88. Which instrument is used to measure atmospheric pressure?

(A) Thermometer


(B) Barometer


(C) Hygrometer


(D) Anemometer




89. Who is called the Father of Medicine?

(A) Aristotle


(B) Hippocrates


(C) Galen


(D) Socrates




90. Which vitamin deficiency causes rickets?

(A) Vitamin A


(B) Vitamin B


(C) Vitamin C


(D) Vitamin D




91. Which of the following is known as the Red Planet?

(A) Mars


(B) Jupiter


(C) Venus


(D) Saturn




92. Which organ purifies blood in the human body?

(A) Heart


(B) Kidney


(C) Liver


(D) Lungs




93. Which gas is known as laughing gas?

(A) Nitrogen


(B) Nitrous oxide


(C) Carbon dioxide


(D) Oxygen




94. The smallest bone in the human body is found in the _____?

(A) Ear


(B) Nose


(C) Hand


(D) Foot




95. Which planet has the largest number of moons?

(A) Jupiter


(B) Saturn


(C) Uranus


(D) Neptune




96. What is the chemical name of table salt?

(A) Sodium nitrate


(B) Sodium chloride


(C) Potassium chloride


(D) Calcium carbonate




97. Which gas is essential for photosynthesis?

(A) Oxygen


(B) Carbon dioxide


(C) Nitrogen


(D) Methane




98. Which instrument is used to measure humidity?

(A) Hygrometer


(B) Thermometer


(C) Barometer


(D) Hydrometer




99. Which blood group is known as the universal recipient?

(A) A


(B) B


(C) AB


(D) O




100. Which planet is called the “Morning Star” or “Evening Star”?

(A) Venus


(B) Mars


(C) Mercury


(D) Jupiter




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