PPSC Science Past Papers  MCQs 2022

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





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





3. How many bones in human body?





4. What is the chemical name of limestone?





5. Who invented Telephone?





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





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





8. What is the chemical formula of Washing Soda?





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





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





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





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





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





14. Cooking gas is mixture of ______?





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





16. The symbol of element Copper is?





17. Sunlight is a good source of vitamin ____?





18. Which gas is used in the electric bulb?





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





20. Solar system was discovered by _____?





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





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





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





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





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





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





27. Meteorology is the science of _____?





28. Meteorology is study of _____?





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





30. Special theory of relativity was given by ___?





31. A universal donor has the blood group _____?





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 ________?





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





34. Joule is the unit of ______?





35. Hemodialysis means cleaning of ______?





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





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





38. Who discovered Penicillin?





39. Which resources are non-renewable?





40. The steam-engine was invented ____?





41. Humans have ______ pairs of chromosomes.





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





43. Bauxite is an ore of _____?





44. Bronze is an alloy of _____?





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





46. Who discovered the circulation of blood?





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





48. Kidney stones are formed by which element?





49. Loud speaker voice is increased due to _____?





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





51. The luminous body emits _____?





52. Which mushroom is not edible?





53. Who invented dynamite?





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





55. What is the cause of rainbow?





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





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





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





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





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





61. Which sea has no coasts?





62. Haematite is the ore of _____?





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





64. Smallest planet of solar system is _____?





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





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





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





68. All of the following are biodegradable except:





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





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





71. Saliva helps in the digestion of _____?





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





73. Which gas is commonly used in balloons?





74. Most commonly used bleaching agent is _____?





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





76. Who gave the first picture of the cell?





77. The main constituent of biogas is _____?





78. Most important stimulant in tea leaves is _____?





79. The animal which changes its sex is _____?





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





81. Which metal is liquid at room temperature?





82. Which vitamin is essential for blood clotting?





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





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





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





86. Which is the hardest natural substance on Earth?





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





88. Which instrument is used to measure atmospheric pressure?





89. Who is called the Father of Medicine?





90. Which vitamin deficiency causes rickets?





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





92. Which organ purifies blood in the human body?





93. Which gas is known as laughing gas?





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





95. Which planet has the largest number of moons?





96. What is the chemical name of table salt?





97. Which gas is essential for photosynthesis?





98. Which instrument is used to measure humidity?





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





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





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