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PPSC Science Past Papers  MCQs 2024

1. What is the Unit of Force?

(A) Newton


(B) Joule


(C) Watt


(D) Metre




2. The SI unit of electric current is _____?

(A) Ampere


(B) Volt


(C) Coulomb


(D) None of these




3. The most important stimulus for tea leaves is _____?

(A) Brucine


(B) Caffeine


(C) Phyenylalanine


(D) Theine




4. Which is the longest and the strongest bone in human body?

(A) Femur


(B) Stapes


(C) Tibia


(D) Femur




5. Which gas is commonly used in balloons and airships?

(A) Hydrogen


(B) Helium


(C) Carbon dioxide


(D) Hydrogen Sulphide




6. The ozone layer protects the earth from rays sent by the sun?

(A) Radioactive rays


(B) Infrared rays


(C) Gamma rays


(D) Ultraviolet rays




7. Who invented Telephone?

(A) Thomas Edison


(B) Nikola Tesla


(C) Alexander Graham Bell


(D) None of these




8. The largest planet of the solar system is _____?

(A) Earth


(B) Mars


(C) Jupiter


(D) Saturn




9. Nearest planet to the sun is/are _____?

(A) Mercury


(B) Venus


(C) Mars


(D) Both A and B




10. The energy stored in coal is _____?

(A) Kinetic Energy


(B) Chemical Energy


(C) Potential Energy


(D) None of these




11. Albert Einstein is best known for his ______?

(A) Research on Universe


(B) Ideas about human development


(C) Theory of Relativity


(D) Theory of Evolution




12. Ozone layer protects us from the harmful _______ of the Sun.

(A) Heat


(B) Cold


(C) Ultraviolet rays


(D) None of these




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

(A) Kelvin


(B) Centigrade


(C) Fahrenheit


(D) None of these




14. The medical doctor who is specialist of eye sight is ______?

(A) Orthodontist


(B) Orthopedist


(C) Ophthalmologist


(D) None of these




15. Cataract is the disease of ______?

(A) Eye


(B) Ear


(C) Nervous system


(D) Brain




16. Electrocardiography (ECG or EKG) is used for the diagnosis of the ailment of the _____?

(A) Brain


(B) Heart


(C) Liver


(D) Kidneys




17. When white light is passed through a prism, it splits into ______ colors.

(A) 7


(B) 8


(C) 2


(D) 4




18. The most brightest planet is ______?

(A) Sun


(B) Mercury


(C) Venus


(D) None of these




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

(A) Thyroid


(B) Liver


(C) Pancreas


(D) None of these




20. Which gases/elements are used in gas-welding?

(A) Oxygen, Acetylene and Argon


(B) Oxygen, Acetylene and Nitrogen


(C) Air and Acetylenes


(D) None of these




21. It is dangerous to sleep under trees at night because plants give out _____?

(A) Carbon monoxide


(B) Less oxygen


(C) More oxygen


(D) Carbon dioxide




22. Tides are caused by the gravitational pull of the _____?

(A) Moon


(B) Sun


(C) Earth


(D) Both A and B




23. Air is the example of a/an ______?

(A) Element


(B) Solution


(C) Mixture


(D) Compound




24. The gas commonly known as Laughing gas is?

(A) Nitrous Oxide


(B) Oxygen


(C) Hydrogen


(D) None of these




25. Which of the following is a unit of length?

(A) Liter


(B) Kilogram


(C) Meter


(D) Second




26. 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




27. Which system is responsible to communicate and coordinate for the body functions?

(A) Circulatory System


(B) Respiratory System


(C) Digestive System


(D) Nervous System




28. The study of insects is called ____?

(A) Etymology


(B) Entomology


(C) Zoology


(D) Biology




29. The layers of atmosphere are divided into ____ layers.

(A) 3


(B) 4


(C) 5


(D) 6




30. Ability to be hammered into sheet is called malleability. Which one of the following metals is most malleable?

(A) Gold


(B) Platinum


(C) Silver


(D) None of these




31. Gravity was discovered by ______?

(A) Galileo Galilei


(B) Isaac Newton


(C) Albert Einstein


(D) Johannes Kepler




32. Sound travels fastest in _______?

(A) Air


(B) Water


(C) Diamond


(D) Steel




33. What is a statistical study of the human population called?

(A) Biography


(B) Demography


(C) Pedology


(D) None of these




34. Thalassemia is due to abnormality in _____?

(A) Lymphatic fluid


(B) Hemoglobin


(C) Platelets


(D) White blood cells




35. The SI unit of charge is ________?

(A) Ohm


(B) Coulomb


(C) Ampere


(D) None of these




36. Joule is the unit of ______?

(A) Joule


(B) Energy/Heat


(C) Work


(D) None of these




37. The male reproductive part of the flower is called?

(A) Stamen


(B) Pistil


(C) Carpel


(D) Anther




38. The SI unit of energy is?

(A) Kelvin


(B) Joule


(C) Temperature


(D) Mole




39. What is another name for Baking Soda?

(A) Sodium chloride


(B) Potassium nitrate


(C) Sodium bicarbonate


(D) Calcium carbonate




40. Who invented the Steam Engine?

(A) Bessel


(B) James Watt


(C) Faraday


(D) All of these




41. The main constituent of Hemoglobin is _____?

(A) Calcium


(B) Iron


(C) Chlorine


(D) Copper




42. The most abundant metal in the Earth’s crust is _____?

(A) Aluminum


(B) Iron


(C) Carbon


(D) Silicon




43. In the technical terms, muscle pull is known as ______?

(A) Sprain


(B) Strain


(C) Abrasion


(D) Confusion




44. Which planet has no moon?

(A) Venus


(B) Neptune


(C) Mars


(D) All of these




45. Richter Scale is used for measuring?

(A) Rainfall


(B) Magnitude of velocity


(C) Magnitude of earthquakes


(D) Water level in the dam




46. Which part of the donor’s eye is utilized in eye donation?

(A) Lens


(B) Cornea


(C) Retina


(D) All of these




47. Which type of vitamin is used for human body through sun?

(A) Vitamin K


(B) Vitamin B


(C) Vitamin C


(D) Vitamin D




48. Animals that eat both plants and animals are known as?

(A) Omnivores


(B) Herbivores


(C) Carnivores


(D) None of these




49. Which gas can be accumulated in poorly ventilated buildings?

(A) Xenon


(B) Nitrogen


(C) Hydrogen


(D) Radon




50. Solar Eclipse occurs when _______?

(A) The moon comes between earth and sun


(B) The Sun comes between earth and moon


(C) The Sun comes between earth and earth


(D) None of these




51. The study of reptiles and amphibians is called ______?

(A) Herpetology


(B) Ornithology


(C) Entomology


(D) None of these




52. The duration of day and night at North and South Poles is ______?

(A) 3 months


(B) 5 months


(C) 4 months


(D) 6 months




53. Trachoma is a disease of _____?

(A) Ear


(B) Blood


(C) Eye


(D) Brain




54. Printing Press invented by ___?

(A) John Harrison


(B) Johan Gutenberg


(C) Chinese


(D) Lizlo Biro




55. The study of life is called?

(A) Geology


(B) Chemistry


(C) Biology


(D) Physics




56. What are moraines?

(A) Sand dunes formed by wind


(B) Deposits by glaciers


(C) Rocks formed by volcanic eruptions


(D) Sediments carried by rivers




57. What is a peninsula?

(A) A piece of land surrounded by water on three sides


(B) A body of water surrounded by land


(C) A large island surrounded by ocean


(D) A piece of land completely surrounded by water




58. What is the approximate percentage of water in carbonated drinks?

(A) 70%


(B) 80%


(C) 92%


(D) 95%




59. What type of energy do solar cells convert?

(A) Kinetic energy to electrical energy


(B) Thermal energy to electrical energy


(C) Solar energy to electrical energy


(D) Chemical energy to electrical energy




60. A stone is a unit of which measurement?

(A) Length


(B) Weight


(C) Area


(D) Volume




61. What is the process called when a cell engulfs another cell?

(A) Phagocytosis


(B) Mitosis


(C) Diffusion


(D) Osmosis




62. What is the climate fund required by 2030 as per the NCFS (National Climate Finance Strategy)?

(A) $100 billion


(B) $200 billion


(C) $348 billion


(D) $300 billion




63. Cyril Ramaphosa is the president of which country?

(A) Zimbabwe


(B) South Africa


(C) Kenya


(D) Nigeria




64. What are detritivores also called?

(A) Producers


(B) Herbivores


(C) Decomposers


(D) Carnivores




65. The Cave Squeaker, an endangered species of Frog, found in which country?

(A) Zimbabwe


(B) Egypt


(C) Iceland


(D) Argentina




66. Which of the following is an electrolyte?

(A) NaCl


(B) Oil


(C) Ethanol


(D) None of these




67. Acid rain contains high levels of _____?

(A) Sulphuric Acid


(B) Nitric Acid


(C) Oxalic Acid


(D) Both A and B




68. Our earth is divided into how many climate zones?

(A) Three


(B) Two


(C) Four


(D) None of these




69. Who gave the theory of Evolution By Natural Selection?

(A) Edward Teller


(B) Charles Darwin


(C) Charles Babbage


(D) Einstein




70. Deficiency of Iodine causes ____?

(A) Imbalances in fluid volume in the vessels and tissues


(B) Goiter


(C) Tetanus


(D) Cancer




71. What is the branch of biology that deals with organisms living in the oceans?

(A) Marine Zoology


(B) Marine Biology


(C) Oceanography


(D) Aquatic Biology




72. The sphygmomanometer measures blood pressure through which artery?

(A) Carotid artery


(B) Radial artery


(C) Brachial artery


(D) Femoral artery




73. Matarba Falak in Urdu refers to which planet?

(A) Venus


(B) Mars


(C) Jupiter


(D) Mercury




74. The force with which the earth attracts a body towards itself is called?

(A) Mass


(B) Weight


(C) Electric force


(D) Magnetic Force




75. Doctors use a sphygmomanometer on which part of the body?

(A) Arm


(B) Leg


(C) Chest


(D) Neck




76. What is the study of fossils called?

(A) Paleontology


(B) Archaeology


(C) Geology


(D) Anthropology




77. Sulphur and Nitrogen cause _____?

(A) Greenhouse Effect


(B) Ozone Layer Depletion


(C) Acid Rain


(D) None of these




78. Air is a mixture of _______?

(A) Solid


(B) Liquid


(C) Gas


(D) None of these




79. Which is the largest part of the human brain?

(A) Encephalus


(B) Cerebellum


(C) Middle brain


(D) Cerebrum




80. Who proposed the Theory of Evolution?

(A) Charles Darwin


(B) Herbert Spencer


(C) Mendel


(D) None of these




81. Radioactivity measured by which device?

(A) Radioactivity meter


(B) Geiger counter


(C) Roll counter


(D) None of these




82. What are objects that orbit around a planet called?

(A) Comets


(B) Satellites


(C) Asteroids


(D) Meteoroids




83. What is the normal value of systolic pressure?

(A) 80 Torr


(B) 100 Torr


(C) 120 Torr


(D) 140 Torr




84. What is the soft form of coal?

(A) Anthracite


(B) Bituminous


(C) Lignite


(D) Magnetite




85. Which type of cells protect the body from infectious diseases and foreign invaders?

(A) Red Blood Cells


(B) White Blood Cells


(C) Platelets


(D) None of these




86. The freezing point of water on a centigrade scale is?

(A) 0°C


(B) 1°C


(C) -1°C


(D) 5°C




87. Which of the following does the color of a star define?

(A) Size


(B) Age


(C) Temperature


(D) None of these




88. What is the last planet in the solar system?

(A) Saturn


(B) Neptune


(C) Uranus


(D) None of these




89. White blood cells also called leukocytes fight against?

(A) Disease


(B) Height


(C) Age


(D) None of these




90. The SI is made up of how many basic units?

(A) 7


(B) 6


(C) 19


(D) 20




91. Which is the heaviest planet in the solar system?

(A) Venus


(B) Jupiter


(C) Mars


(D) Mercury




92. Who discovered laughing gas?

(A) Joseph Priestley


(B) Humphry Davy


(C) Carl Wilhelm Scheele


(D) None of these




93. Benjamin Franklin an American invented ____?

(A) Bulb


(B) Electricity Rod


(C) Lightening Rod


(D) None of these




94. The name of Robert Watson-Watt is associated with which of the following inventions?

(A) Radio


(B) Radar technology


(C) Television


(D) None of these




95. Dermatology is the study of _____?

(A) Bones


(B) Skin


(C) Blood


(D) None of these




96. What happens to the taste buds during a fever due to an increase in body temperature?

(A) Taste buds perform better and become more sensitive


(B) Taste buds function normally without any impact


(C) Taste buds can’t perform properly


(D) Taste buds become completely inactive




97. Which source contains the highest amount of iodine?

(A) Milk


(B) Seaweed


(C) Eggs


(D) Fish




98. The nonrenewable source of energy is _____?

(A) Wind energy


(B) Solar energy


(C) Hydropower


(D) Nuclear energy




99. Stethoscope was invented by ______?

(A) Rene Laennec


(B) William Harway


(C) Both A and B


(D) None of these




100. The temperature of environment increases due to ____?

(A) Greenhouse gases


(B) Nitrogen gas


(C) Carbon Monoxide


(D) Sulfur




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