500+ MCQ Of Everyday Science (English) For Competitive Exams

 

Q1. Which planet is known as the Red Planet?

A) Venus B) Mars C) Mercury D) Jupiter

Q2. Which gas is essential for human respiration?

A) Carbon dioxide B) Oxygen C) Nitrogen D) Hydrogen

Q3. Water boils at 100°C at:

A) 1 atm pressure B) 2 atm pressure C) 0.5 atm pressure D) 1.5 atm pressure

Q4. Which organ pumps blood throughout the body?

A) Liver B) Kidney C) Heart D) Lungs

Q5. Common salt is chemically called:

A) Sodium Hydroxide B) Sodium Chloride C) Potassium Nitrate D) Calcium Carbonate

Q6. The twinkling of stars is due to:

A) Reflection of light B) Refraction of light through the atmosphere C) Rotation of Earth D) Gravitational pull

Q7. Which vitamin is obtained from sunlight?

A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D

Q8. Which is the largest organ of the human body?

A) Liver B) Skin C) Heart D) Lungs

Q9. The main component of natural gas is:

A) Methane B) Carbon dioxide C) Nitrogen D) Oxygen

Q10. Which part of blood helps in clotting?

A) RBC B) WBC C) Platelets D) Plasma

Q11. Which is the nearest planet to the Sun?

A) Venus B) Mercury C) Mars D) Earth

Q12. Which type of lens is used to correct short-sightedness?

A) Convex lens B) Concave lens C) Cylindrical lens D) Plane lens

Q13. Which gas is called laughing gas?

A) Carbon dioxide B) Nitrous oxide C) Oxygen D) Nitrogen

Q14. Which process produces oxygen in plants?

A) Respiration B) Photosynthesis C) Fermentation D) Decomposition

Q15. Which planet is known for its rings?

A) Jupiter B) Saturn C) Uranus D) Neptune

Q16. The SI unit of force is:

A) Joule B) Newton C) Watt D) Pascal

Q17. Sound cannot travel in:

A) Air B) Water C) Steel D) Vacuum

Q18. Which organ removes waste from blood?

A) Liver B) Kidney C) Lungs D) Heart

Q19. Which planet is called Earth’s twin?

A) Venus B) Mars C) Mercury D) Jupiter

Q20. Which vitamin is essential for blood clotting?

A) Vitamin A B) Vitamin D C) Vitamin K D) Vitamin C

Q21. Which star is nearest to Earth?

A) Sirius B) Sun C) Proxima Centauri D) Alpha Centauri

Q22. Which planet has the fastest rotation in the solar system?

A) Earth B) Jupiter C) Mars D) Venus

Q23. Which organ produces insulin?

A) Liver B) Pancreas C) Kidney D) Heart

Q24. The bending of light around the corners is called:

A) Reflection B) Refraction C) Diffraction D) Dispersion

Q25. Which device is used to measure electric current?

A) Voltmeter B) Ammeter C) Galvanometer D) Wattmeter

Q26. Which energy source is renewable?

A) Coal B) Petroleum C) Solar energy D) Natural gas

Q27. Which gas causes global warming?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q28. Which simple machine is used to lift heavy loads with less effort?

A) Pulley B) Lever C) Wheel and axle D) Inclined plane

Q29. The main source of energy for the Earth is:

A) Moon B) Sun C) Stars D) Wind

Q30. Which organ is part of the digestive system?

A) Heart B) Stomach C) Lungs D) Kidney

Q31. Which planet is nearest to Earth at its closest approach?

A) Venus B) Mars C) Mercury D) Jupiter

Q32. Which is a common household detergent?

A) Sodium hydroxide B) Soap C) Sodium lauryl sulfate D) Baking soda

Q33. Which layer of Earth is solid?

A) Crust B) Outer core C) Mantle D) Inner core

Q34. Which vitamin deficiency causes scurvy?

A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D

Q35. Which part of the eye controls the amount of light entering it?

A) Retina B) Cornea C) Iris D) Lens

Q36. Which force keeps planets in orbit?

A) Magnetic force B) Gravitational force C) Electrostatic force D) Nuclear force

Q37. Which is the hardest natural substance?

A) Gold B) Diamond C) Quartz D) Iron

Q38. Which is the main component of air?

A) Oxygen B) Nitrogen C) Carbon dioxide D) Hydrogen

Q39. Which process is used to obtain drinking water from sea water?

A) Filtration B) Distillation C) Sedimentation D) Boiling

Q40. Which system controls body functions through hormones?

A) Nervous system B) Digestive system C) Endocrine system D) Circulatory system

Q41. Which part of blood carries oxygen?

A) WBC B) RBC C) Platelets D) Plasma

Q42. Which planet has a retrograde rotation?

A) Venus B) Mars C) Mercury D) Jupiter

Q43. Which of the following is a non-metal?

A) Iron B) Sulphur C) Aluminium D) Copper

Q44. Which simple machine is used in a ramp?

A) Pulley B) Lever C) Inclined plane D) Wheel and axle

Q45. Which gas is produced during fermentation?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q46. Which planet is called the morning star?

A) Mars B) Venus C) Mercury D) Jupiter

Q47. Which type of blood cells fight infection?

A) RBC B) WBC C) Platelets D) Plasma

Q48. Which planet has the largest number of moons?

A) Saturn B) Jupiter C) Mars D) Neptune

Q49. Which type of energy is stored in food?

A) Kinetic energy B) Potential energy C) Chemical energy D) Thermal energy

Q50. Which planet is known as the blue planet?

A) Mercury B) Venus C) Earth D) Uranus

Q51. Which planet is farthest from the Sun?

A) Neptune B) Uranus C) Saturn D) Jupiter

Q52. Which part of the human brain controls balance and coordination?

A) Cerebrum B) Cerebellum C) Medulla D) Hypothalamus

Q53. The chemical formula of water is:

A) H2O2 B) H2O C) CO2 D) NaCl

Q54. Which gas is responsible for the greenhouse effect?

A) Nitrogen B) Oxygen C) Carbon dioxide D) Helium

Q55. Which planet is known as the Evening Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q56. The SI unit of energy is:

A) Newton B) Joule C) Watt D) Pascal

Q57. Which is the main gas in the Earth’s atmosphere?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q58. Which organ produces bile?

A) Liver B) Pancreas C) Kidney D) Stomach

Q59. Which planet rotates on its axis in the opposite direction to most planets?

A) Mercury B) Venus C) Mars D) Jupiter

Q60. Which type of blood cells fight infections?

A) RBC B) WBC C) Platelets D) Plasma

Q61. The force that keeps planets in orbit around the Sun is:

A) Magnetic force B) Gravitational force C) Centripetal force D) Frictional force

Q62. Which vitamin deficiency causes rickets?

A) Vitamin A B) Vitamin D C) Vitamin C D) Vitamin K

Q63. Which is a fossil fuel?

A) Coal B) Solar energy C) Wind energy D) Biofuel

Q64. Which organelle is called the powerhouse of the cell?

A) Nucleus B) Mitochondria C) Ribosome D) Chloroplast

Q65. Which planet is called the Morning Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q66. Which is the hardest natural substance?

A) Diamond B) Quartz C) Iron D) Gold

Q67. Which is the main function of red blood cells?

A) Fight infections B) Carry oxygen C) Clot blood D) Produce hormones

Q68. Which planet is called the Gas Giant?

A) Earth B) Jupiter C) Mars D) Mercury

Q69. The process of converting water vapor into liquid is called:

A) Evaporation B) Condensation C) Sublimation D) Freezing

Q70. Which layer of the atmosphere contains ozone?

A) Troposphere B) Stratosphere C) Mesosphere D) Thermosphere

Q71. Which type of chemical bond involves sharing of electrons?

A) Ionic B) Covalent C) Metallic D) Hydrogen

Q72. Which organ is part of the respiratory system?

A) Heart B) Lungs C) Liver D) Stomach

Q73. Which planet has the most moons?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q74. Which is a non-metal?

A) Aluminium B) Sulphur C) Iron D) Copper

Q75. Which gas is released during photosynthesis?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q76. Which type of simple machine is a wheelbarrow?

A) Lever B) Pulley C) Inclined plane D) Screw

Q77. Which planet is called the Blue Planet?

A) Uranus B) Earth C) Neptune D) Venus

Q78. Which gas is essential for photosynthesis?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Helium

Q79. Which is the main component of LPG?

A) Propane and Butane B) Methane C) Ethanol D) Carbon dioxide

Q80. Which organ is called the seat of intelligence?

A) Cerebellum B) Cerebrum C) Medulla D) Pons

Q81. Which process converts sugar into alcohol and CO2?

A) Fermentation B) Photosynthesis C) Respiration D) Oxidation

Q82. Which planet has a faint ring system?

A) Mars B) Uranus C) Earth D) Venus

Q83. Which chemical is used in making soap?

A) Sodium hydroxide B) Sodium chloride C) Sodium bicarbonate D) Calcium carbonate

Q84. Which organ secretes digestive enzymes into the small intestine?

A) Liver B) Pancreas C) Kidney D) Stomach

Q85. Which planet is known for its extreme surface temperature variation?

A) Mercury B) Venus C) Mars D) Jupiter

Q86. Which part of blood transports nutrients?

A) RBC B) WBC C) Plasma D) Platelets

Q87. Which process in plants releases water vapor into the atmosphere?

A) Photosynthesis B) Transpiration C) Respiration D) Fermentation

Q88. Which planet has a dense atmosphere of mostly CO2?

A) Mars B) Venus C) Mercury D) Jupiter

Q89. Which simple machine is a pair of scissors?

A) Lever and wedge B) Pulley C) Wheel and axle D) Inclined plane

Q90. Which part of the human body produces bile?

A) Liver B) Pancreas C) Gallbladder D) Stomach

Q91. Which gas is necessary for welding?

A) Oxygen B) Carbon dioxide C) Hydrogen D) Helium

Q92. Which type of rock is formed by cooling of lava?

A) Igneous B) Sedimentary C) Metamorphic D) Fossil

Q93. Which planet has no moons?

A) Mercury B) Venus C) Earth D) Mars

Q94. Which is the main source of energy for photosynthesis?

A) Water B) Sunlight C) Oxygen D) Soil nutrients

Q95. Which gas is used in balloons to make them float?

A) Oxygen B) Hydrogen C) Helium D) Carbon dioxide

Q96. Which organ helps in breathing?

A) Kidney B) Lungs C) Heart D) Liver

Q97. Which planet is closest to Earth on average?

A) Mars B) Venus C) Mercury D) Jupiter

Q98. Which process in plants uses CO2 to produce glucose?

A) Photosynthesis B) Respiration C) Fermentation D) Decomposition

Q99. Which gas is released during burning of coal?

A) Oxygen B) Carbon dioxide C) Hydrogen D) Nitrogen

Q100. Which device is used to measure atmospheric pressure?

A) Thermometer B) Barometer C) Hygrometer D) Ammeter

Q101. Which planet is called the Ice Giant?

A) Uranus B) Neptune C) Jupiter D) Saturn

Q102. Which blood cells help in clotting?

A) RBC B) WBC C) Platelets D) Plasma

Q103. Which gas is used in refrigerators?

A) Helium B) Ammonia C) Oxygen D) Nitrogen

Q104. Which planet has the longest day?

A) Venus B) Mercury C) Mars D) Jupiter

Q105. Which organ produces bile?

A) Gallbladder B) Liver C) Pancreas D) Stomach

Q106. The main gas in the Sun is:

A) Hydrogen B) Oxygen C) Helium D) Nitrogen

Q107. Which is the hardest natural substance?

A) Diamond B) Graphite C) Quartz D) Iron

Q108. Which organ is part of the endocrine system?

A) Heart B) Thyroid C) Lungs D) Kidney

Q109. Which type of blood carries oxygen?

A) RBC B) WBC C) Plasma D) Platelets

Q110. Which planet is closest to the Sun?

A) Mercury B) Venus C) Earth D) Mars

Q111. Which vitamin is necessary for vision?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q112. Which gas is used in filling balloons to make them float safely?

A) Hydrogen B) Helium C) Oxygen D) Nitrogen

Q113. Which organ regulates blood sugar levels?

A) Liver B) Pancreas C) Kidney D) Heart

Q114. Which planet has the highest surface temperature?

A) Mercury B) Venus C) Mars D) Jupiter

Q115. Which is the main component of air?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q116. Which planet has a ring system?

A) Jupiter B) Saturn C) Uranus D) All of these

Q117. Which simple machine is used in a pulley?

A) Lever B) Wheel and axle C) Inclined plane D) Screw

Q118. Which gas is produced during fermentation?

A) Oxygen B) Hydrogen C) Carbon dioxide D) Nitrogen

Q119. Which organ filters blood in the human body?

A) Liver B) Kidney C) Heart D) Lungs

Q120. Which layer of Earth is liquid?

A) Crust B) Mantle C) Outer core D) Inner core

Q121. Which type of energy is stored in food?

A) Kinetic energy B) Potential energy C) Chemical energy D) Thermal energy

Q122. Which planet has a retrograde rotation?

A) Mercury B) Venus C) Mars D) Jupiter

Q123. Which process in plants releases water vapor?

A) Photosynthesis B) Transpiration C) Respiration D) Fermentation

Q124. Which planet is called the Red Planet?

A) Mars B) Venus C) Mercury D) Jupiter

Q125. Which gas is used in welding?

A) Oxygen B) Nitrogen C) Carbon dioxide D) Helium

Q126. Which process converts water vapor into liquid water?

A) Evaporation B) Condensation C) Sublimation D) Freezing

Q127. Which simple machine is a wheelbarrow?

A) Lever B) Pulley C) Inclined plane D) Screw

Q128. Which organ produces digestive enzymes?

A) Liver B) Pancreas C) Kidney D) Stomach

Q129. Which planet rotates fastest?

A) Earth B) Jupiter C) Mars D) Venus

Q130. Which organ is called the seat of intelligence?

A) Cerebellum B) Cerebrum C) Medulla D) Pons

Q131. Which process in plants produces oxygen?

A) Photosynthesis B) Respiration C) Fermentation D) Decomposition

Q132. Which planet is known as the Morning Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q133. Which type of rock is formed from lava?

A) Igneous B) Sedimentary C) Metamorphic D) Fossil

Q134. Which is a renewable energy source?

A) Coal B) Petroleum C) Solar energy D) Natural gas

Q135. Which planet has the most moons?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q136. Which chemical is used in making soap?

A) Sodium hydroxide B) Sodium chloride C) Sodium bicarbonate D) Calcium carbonate

Q137. Which organ secretes insulin?

A) Liver B) Pancreas C) Kidney D) Heart

Q138. Which planet has a dense CO2 atmosphere?

A) Mars B) Venus C) Mercury D) Jupiter

Q139. Which part of blood transports nutrients?

A) RBC B) WBC C) Plasma D) Platelets

Q140. Which gas causes acid rain?

A) Oxygen B) Nitrogen C) Sulfur dioxide D) Helium

Q141. Which is the main source of energy for Earth?

A) Moon B) Sun C) Stars D) Wind

Q142. Which planet is known for its rings?

A) Jupiter B) Saturn C) Uranus D) All of these

Q143. Which vitamin prevents scurvy?

A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D

Q144. Which gas is necessary for photosynthesis?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Helium

Q145. Which organ is part of the respiratory system?

A) Heart B) Lungs C) Liver D) Stomach

Q146. Which energy source is non-renewable?

A) Solar B) Wind C) Coal D) Biomass

Q147. Which simple machine is an inclined plane?

A) Ramp B) Pulley C) Screw D) Wheel

Q148. Which organ of the body produces bile?

A) Liver B) Gallbladder C) Kidney D) Pancreas

Q149. Which planet is blue due to methane in atmosphere?

A) Uranus B) Neptune C) Jupiter D) Earth

Q150. Which organ is called the powerhouse of the cell?

A) Nucleus B) Mitochondria C) Ribosome D) Chloroplast

Q151. Which planet has the fastest rotation in the solar system?

A) Earth B) Jupiter C) Mars D) Venus

Q152. Which organ regulates metabolism in the human body?

A) Pancreas B) Thyroid C) Liver D) Adrenal

Q153. Water boils at 100°C under:

A) 0.5 atm pressure B) 1 atm pressure C) 2 atm pressure D) 1.5 atm pressure

Q154. Which planet is called the Red Planet?

A) Mars B) Venus C) Mercury D) Jupiter

Q155. Which gas is essential for human respiration?

A) Carbon dioxide B) Oxygen C) Nitrogen D) Hydrogen

Q156. Which organ of the body removes waste from blood?

A) Liver B) Kidney C) Heart D) Lungs

Q157. Which vitamin is synthesized by the human body when exposed to sunlight?

A) Vitamin A B) Vitamin D C) Vitamin C D) Vitamin K

Q158. Which is the hardest natural substance?

A) Diamond B) Graphite C) Quartz D) Iron

Q159. Which planet has the largest number of moons?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q160. Which layer of the atmosphere contains the ozone layer?

A) Troposphere B) Stratosphere C) Mesosphere D) Thermosphere

Q161. Which is the main component of natural gas?

A) Methane B) Carbon dioxide C) Nitrogen D) Hydrogen

Q162. Which planet is closest to the Earth at its nearest point?

A) Venus B) Mars C) Mercury D) Jupiter

Q163. Which organ produces insulin?

A) Liver B) Pancreas C) Kidney D) Heart

Q164. Which planet has a thick CO2 atmosphere causing extreme greenhouse effect?

A) Mercury B) Venus C) Mars D) Jupiter

Q165. Which blood cells are responsible for clotting?

A) RBC B) WBC C) Platelets D) Plasma

Q166. Which organ is part of the human respiratory system?

A) Heart B) Lungs C) Liver D) Kidney

Q167. Which gas is used in filling balloons to make them float safely?

A) Hydrogen B) Helium C) Oxygen D) Nitrogen

Q168. Which planet is known for its ring system?

A) Jupiter B) Saturn C) Uranus D) All of these

Q169. Which simple machine is used in a pulley?

A) Lever B) Wheel and axle C) Inclined plane D) Screw

Q170. Which process converts sugar into alcohol and carbon dioxide?

A) Photosynthesis B) Fermentation C) Respiration D) Oxidation

Q171. Which organ secretes digestive enzymes into the small intestine?

A) Liver B) Pancreas C) Kidney D) Stomach

Q172. Which planet rotates on its axis in the opposite direction to most planets?

A) Mercury B) Venus C) Mars D) Jupiter

Q173. Which is a renewable source of energy?

A) Coal B) Petroleum C) Solar energy D) Natural gas

Q174. Which vitamin is necessary for blood clotting?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q175. Which process in plants releases water vapor into the atmosphere?

A) Photosynthesis B) Transpiration C) Respiration D) Fermentation

Q176. Which planet is called the Morning Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q177. Which organ is the seat of intelligence in humans?

A) Cerebellum B) Cerebrum C) Medulla D) Pons

Q178. Which gas is released during photosynthesis?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q179. Which organ filters blood to remove urea and excess salts?

A) Liver B) Kidney C) Heart D) Lungs

Q180. Which planet has the longest day in the solar system?

A) Venus B) Mercury C) Mars D) Jupiter

Q181. Which energy is stored in food?

A) Kinetic energy B) Potential energy C) Chemical energy D) Thermal energy

Q182. Which planet is known as the Gas Giant?

A) Earth B) Jupiter C) Mars D) Mercury

Q183. Which planet is blue due to methane in its atmosphere?

A) Uranus B) Neptune C) Jupiter D) Earth

Q184. Which organ produces bile?

A) Gallbladder B) Liver C) Pancreas D) Stomach

Q185. Which process converts water vapor into liquid?

A) Evaporation B) Condensation C) Sublimation D) Freezing

Q186. Which gas is responsible for acid rain?

A) Oxygen B) Nitrogen C) Sulfur dioxide D) Helium

Q187. Which planet has faint rings?

A) Mars B) Uranus C) Earth D) Venus

Q188. Which planet has no moons?

A) Mercury B) Venus C) Earth D) Mars

Q189. Which organ of the human body produces digestive enzymes?

A) Liver B) Pancreas C) Kidney D) Stomach

Q190. Which planet is called the Evening Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q191. Which type of rock is formed by cooling of lava?

A) Igneous B) Sedimentary C) Metamorphic D) Fossil

Q192. Which vitamin prevents scurvy?

A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D

Q193. Which planet rotates retrograde?

A) Mercury B) Venus C) Mars D) Jupiter

Q194. Which planet has extreme surface temperature variations?

A) Mercury B) Venus C) Mars D) Jupiter

Q195. Which layer of the Earth is solid?

A) Crust B) Outer core C) Mantle D) Inner core

Q196. Which part of blood carries oxygen?

A) RBC B) WBC C) Platelets D) Plasma

Q197. Which simple machine is a ramp?

A) Lever B) Pulley C) Inclined plane D) Screw

Q198. Which gas is produced during fermentation?

A) Oxygen B) Hydrogen C) Carbon dioxide D) Nitrogen

Q199. Which organ produces insulin?

A) Liver B) Pancreas C) Kidney D) Heart

Q200. Which planet is called the Blue Planet?

A) Mercury B) Venus C) Earth D) Uranus

Q201. Which organ is part of the endocrine system?

A) Liver B) Thyroid C) Heart D) Kidney

Q202. Which gas is released during respiration?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q203. Which planet has the largest diameter in the solar system?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q204. Which organ stores bile?

A) Liver B) Pancreas C) Gallbladder D) Stomach

Q205. Which is the main gas in the Sun?

A) Hydrogen B) Helium C) Oxygen D) Nitrogen

Q206. Which is a non-renewable source of energy?

A) Solar B) Wind C) Coal D) Biomass

Q207. Which vitamin is necessary for vision?

A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D

Q208. Which planet is closest to the Sun?

A) Mercury B) Venus C) Earth D) Mars

Q209. Which planet is called the Gas Giant?

A) Earth B) Jupiter C) Mars D) Venus

Q210. Which blood cells fight infections?

A) RBC B) WBC C) Platelets D) Plasma

Q211. Which planet has a faint ring system?

A) Uranus B) Jupiter C) Saturn D) Mars

Q212. Which simple machine is a screw?

A) Lever B) Pulley C) Inclined plane D) Wheel and axle

Q213. Which gas is used in welding?

A) Oxygen B) Hydrogen C) Carbon dioxide D) Helium

Q214. Which process converts water into water vapor?

A) Condensation B) Evaporation C) Freezing D) Sublimation

Q215. Which planet has a dense CO2 atmosphere causing a greenhouse effect?

A) Mercury B) Venus C) Mars D) Jupiter

Q216. Which organ produces insulin?

A) Liver B) Pancreas C) Kidney D) Heart

Q217. Which vitamin prevents scurvy?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q218. Which layer of the Earth is liquid?

A) Crust B) Mantle C) Outer core D) Inner core

Q219. Which planet rotates in the opposite direction to most planets?

A) Mercury B) Venus C) Mars D) Jupiter

Q220. Which planet is known as the Blue Planet?

A) Mercury B) Venus C) Earth D) Neptune

Q221. Which gas is necessary for photosynthesis?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q222. Which organ filters blood to remove urea?

A) Liver B) Kidney C) Heart D) Lungs

Q223. Which planet is called the Red Planet?

A) Mars B) Venus C) Mercury D) Jupiter

Q224. Which gas is produced during fermentation?

A) Oxygen B) Hydrogen C) Carbon dioxide D) Nitrogen

Q225. Which planet has the largest number of moons?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q226. Which organ is called the powerhouse of the cell?

A) Nucleus B) Mitochondria C) Ribosome D) Chloroplast

Q227. Which planet has the longest day?

A) Venus B) Mercury C) Mars D) Jupiter

Q228. Which vitamin is synthesized when skin is exposed to sunlight?

A) Vitamin A B) Vitamin D C) Vitamin C D) Vitamin K

Q229. Which simple machine is a wheelbarrow?

A) Lever B) Pulley C) Inclined plane D) Screw

Q230. Which organ secretes digestive enzymes into the small intestine?

A) Liver B) Pancreas C) Kidney D) Stomach

Q231. Which planet is closest to the Earth on average?

A) Venus B) Mars C) Mercury D) Jupiter

Q232. Which energy source is renewable?

A) Coal B) Solar C) Petroleum D) Natural gas

Q233. Which planet has extreme surface temperature variations?

A) Mercury B) Venus C) Mars D) Jupiter

Q234. Which organ regulates blood sugar?

A) Liver B) Pancreas C) Kidney D) Heart

Q235. Which vitamin is necessary for blood clotting?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q236. Which organ produces bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q237. Which energy is stored in food?

A) Kinetic energy B) Potential energy C) Chemical energy D) Thermal energy

Q238. Which planet has the largest diameter?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q239. Which planet is called the Morning Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q240. Which organ is the seat of intelligence?

A) Cerebellum B) Cerebrum C) Medulla D) Pons

Q241. Which layer of the Earth is solid?

A) Crust B) Outer core C) Mantle D) Inner core

Q242. Which process converts water vapor into liquid water?

A) Evaporation B) Condensation C) Sublimation D) Freezing

Q243. Which planet rotates retrograde?

A) Mercury B) Venus C) Mars D) Jupiter

Q244. Which organ regulates blood sugar?

A) Liver B) Pancreas C) Kidney D) Heart

Q245. Which vitamin is necessary for blood clotting?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q246. Which organ produces bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q247. Which energy is stored in food?

A) Kinetic energy B) Potential energy C) Chemical energy D) Thermal energy

Q248. Which planet has the largest diameter?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q249. Which planet is called the Morning Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q250. Which organ is the seat of intelligence?

A) Cerebellum B) Cerebrum C) Medulla D) Pons

Q251. Which gas is essential for human respiration?

A) Carbon dioxide B) Oxygen C) Nitrogen D) Hydrogen

Q252. Which planet is closest to the Sun?

A) Mercury B) Venus C) Earth D) Mars

Q253. Which planet is called the Gas Giant?

A) Earth B) Jupiter C) Mars D) Venus

Q254. Which planet rotates fastest in the solar system?

A) Earth B) Jupiter C) Mars D) Venus

Q255. Which blood cells help in clotting?

A) RBC B) WBC C) Platelets D) Plasma

Q256. Which planet has the largest number of moons?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q257. Which organ produces bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q258. Which planet has a retrograde rotation?

A) Mercury B) Venus C) Mars D) Jupiter

Q259. Which planet is known as the Red Planet?

A) Mars B) Venus C) Mercury D) Jupiter

Q260. Which vitamin is necessary for vision?

A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D

Q261. Which planet has the highest surface temperature?

A) Mercury B) Venus C) Mars D) Jupiter

Q262. Which vitamin prevents scurvy?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q263. Which planet is called the Blue Planet?

A) Mercury B) Venus C) Earth D) Neptune

Q264. Which planet is called the Morning Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q265. Which organ regulates blood sugar?

A) Liver B) Pancreas C) Kidney D) Heart

Q266. Which planet rotates on its axis the slowest?

A) Mercury B) Venus C) Mars D) Jupiter

Q267. Which is the hardest natural substance?

A) Diamond B) Graphite C) Quartz D) Iron

Q268. Which layer of the Earth is liquid?

A) Crust B) Mantle C) Outer core D) Inner core

Q269. Which gas is produced during fermentation?

A) Oxygen B) Hydrogen C) Carbon dioxide D) Nitrogen

Q270. Which planet has faint rings?

A) Mars B) Uranus C) Earth D) Venus

Q271. Which simple machine is a ramp?

A) Lever B) Pulley C) Inclined plane D) Screw

Q272. Which planet has a thick CO2 atmosphere?

A) Mercury B) Venus C) Mars D) Jupiter

Q273. Which organ stores bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q274. Which planet is closest to the Earth on average?

A) Venus B) Mars C) Mercury D) Jupiter

Q275. Which energy source is renewable?

A) Coal B) Solar C) Petroleum D) Natural gas

Q276. Which planet has extreme surface temperature variations?

A) Mercury B) Venus C) Mars D) Jupiter

Q277. Which organ produces digestive enzymes into the small intestine?

A) Liver B) Pancreas C) Kidney D) Stomach

Q278. Which vitamin is synthesized in the skin when exposed to sunlight?

A) Vitamin A B) Vitamin D C) Vitamin C D) Vitamin K

Q279. Which organ is the seat of intelligence?

A) Cerebellum B) Cerebrum C) Medulla D) Pons

Q280. Which gas causes acid rain?

A) Oxygen B) Nitrogen C) Sulfur dioxide D) Helium

Q281. Which planet has the largest diameter?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q282. Which planet is known as the Red Planet?

A) Mars B) Venus C) Mercury D) Jupiter

Q283. Which blood cells fight infections?

A) RBC B) WBC C) Platelets D) Plasma

Q284. Which organ is called the powerhouse of the cell?

A) Nucleus B) Mitochondria C) Ribosome D) Chloroplast

Q285. Which gas is necessary for photosynthesis?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q286. Which organ filters blood to remove urea?

A) Liver B) Kidney C) Heart D) Lungs

Q287. Which planet rotates retrograde?

A) Mercury B) Venus C) Mars D) Jupiter

Q288. Which vitamin is necessary for blood clotting?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q289. Which energy is stored in food?

A) Kinetic energy B) Potential energy C) Chemical energy D) Thermal energy

Q290. Which planet rotates the slowest?

A) Mercury B) Venus C) Mars D) Jupiter

Q291. Which planet is called the Morning Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q292. Which organ regulates metabolism?

A) Liver B) Thyroid C) Pancreas D) Adrenal

Q293. Which gas is used in balloons safely?

A) Hydrogen B) Helium C) Oxygen D) Nitrogen

Q294. Which planet has faint rings?

A) Mars B) Uranus C) Earth D) Venus

Q295. Which organ stores bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q296. Which planet is the Blue Planet?

A) Mercury B) Venus C) Earth D) Neptune

Q297. Which gas is produced during fermentation?

A) Oxygen B) Hydrogen C) Carbon dioxide D) Nitrogen

Q298. Which planet has the largest number of moons?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q299. Which planet is closest to Earth at nearest point?

A) Venus B) Mars C) Mercury D) Jupiter

Q300. Which organ secretes digestive enzymes?

A) Liver B) Pancreas C) Kidney D) Stomach

Q301. Which organ is part of the human endocrine system?

A) Liver B) Thyroid C) Heart D) Kidney

Q302. Which gas is necessary for photosynthesis?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q303. Which planet has the shortest day?

A) Earth B) Jupiter C) Mars D) Venus

Q304. Which organ regulates blood sugar?

A) Liver B) Pancreas C) Kidney D) Heart

Q305. Which planet is called the Red Planet?

A) Mars B) Venus C) Mercury D) Jupiter

Q306. Which vitamin prevents scurvy?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q307. Which planet is known as the Gas Giant?

A) Earth B) Jupiter C) Mars D) Venus

Q308. Which planet rotates retrograde?

A) Mercury B) Venus C) Mars D) Jupiter

Q309. Which planet is called the Blue Planet?

A) Mercury B) Venus C) Earth D) Neptune

Q310. Which planet has faint rings?

A) Mars B) Uranus C) Earth D) Venus

Q311. Which organ produces insulin?

A) Liver B) Pancreas C) Kidney D) Heart

Q312. Which planet has extreme surface temperature variations?

A) Mercury B) Venus C) Mars D) Jupiter

Q313. Which energy is stored in food?

A) Kinetic energy B) Potential energy C) Chemical energy D) Thermal energy

Q314. Which organ filters blood to remove urea?

A) Liver B) Kidney C) Heart D) Lungs

Q315. Which vitamin is necessary for vision?

A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D

Q316. Which gas is produced during fermentation?

A) Oxygen B) Hydrogen C) Carbon dioxide D) Nitrogen

Q317. Which planet has the longest day?

A) Mercury B) Venus C) Mars D) Jupiter

Q318. Which organ is called the powerhouse of the cell?

A) Nucleus B) Mitochondria C) Ribosome D) Chloroplast

Q319. Which planet has the largest diameter?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q320. Which planet has the highest surface temperature?

A) Mercury B) Venus C) Mars D) Jupiter

Q321. Which organ stores bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q322. Which gas is necessary for human respiration?

A) Carbon dioxide B) Oxygen C) Nitrogen D) Hydrogen

Q323. Which blood cells help fight infections?

A) RBC B) WBC C) Platelets D) Plasma

Q324. Which planet rotates the fastest?

A) Earth B) Jupiter C) Mars D) Venus

Q325. Which simple machine is a ramp?

A) Lever B) Pulley C) Inclined plane D) Screw

Q326. Which organ secretes digestive enzymes into the small intestine?

A) Liver B) Pancreas C) Kidney D) Stomach

Q327. Which planet rotates retrograde?

A) Mercury B) Venus C) Mars D) Jupiter

Q328. Which planet is called the Red Planet?

A) Mars B) Venus C) Mercury D) Jupiter

Q329. Which planet is called the Blue Planet?

A) Mercury B) Venus C) Earth D) Neptune

Q330. Which energy source is renewable?

A) Coal B) Solar C) Petroleum D) Natural gas

Q331. Which vitamin prevents rickets?

A) Vitamin A B) Vitamin D C) Vitamin C D) Vitamin K

Q332. Which planet rotates retrograde?

A) Mercury B) Venus C) Mars D) Jupiter

Q333. Which planet is called the Morning Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q334. Which planet is known as the Red Planet?

A) Mars B) Venus C) Mercury D) Jupiter

Q335. Which organ produces bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q336. Which planet has faint rings?

A) Mars B) Uranus C) Earth D) Venus

Q337. Which organ regulates blood sugar?

A) Liver B) Pancreas C) Kidney D) Heart

Q338. Which organ filters blood to remove urea?

A) Liver B) Kidney C) Heart D) Lungs

Q339. Which organ is the seat of intelligence?

A) Cerebellum B) Cerebrum C) Medulla D) Pons

Q340. Which gas is used in balloons safely?

A) Hydrogen B) Helium C) Oxygen D) Nitrogen

Q341. Which vitamin is necessary for blood clotting?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q342. Which organ secretes digestive enzymes?

A) Liver B) Pancreas C) Kidney D) Stomach

Q343. Which energy is stored in food?

A) Kinetic energy B) Potential energy C) Chemical energy D) Thermal energy

Q344. Which planet rotates the slowest?

A) Mercury B) Venus C) Mars D) Jupiter

Q345. Which blood cells help in clotting?

A) RBC B) WBC C) Platelets D) Plasma

Q346. Which gas is most abundant in the atmosphere?

A) Oxygen B) Nitrogen C) Carbon dioxide D) Hydrogen

Q347. How many chambers are there in the human heart?

A) 2 B) 3 C) 4 D) 5

Q348. Where does most nutrient absorption occur in humans?

A) Stomach B) Small intestine C) Large intestine D) Liver

Q349. Which is the nearest planet to the Sun?

A) Venus B) Earth C) Mercury D) Mars

Q350. Which is the primary source of energy for Earth?

A) Sun B) Moon C) Jupiter D) Mars

Q351. What causes day and night on Earth?

A) Revolution of Earth around Sun B) Rotation of Earth on its axis C) Tilt of Earth D) Moon’s revolution

Q352. Which layer protects Earth from harmful UV rays?

A) Troposphere B) Mesosphere C) Stratosphere (Ozone Layer) D) Thermosphere

Q353. What is the Sun?

A) Star B) Planet C) Satellite D) Comet

Q354. Which is the largest planet in the solar system?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q355. What is Earth’s natural satellite?

A) Sun B) Mars C) Moon D) Venus

Q356. Which cells carry oxygen in the blood?

A) WBC B) RBC C) Platelets D) Plasma

Q357. At what temperature does water boil at sea level?

A) 100°C B) 90°C C) 120°C D) 80°C

Q358. What does sound need to travel?

A) Vacuum B) Light C) Medium D) Electricity

Q359. Which planet completes orbit around Sun fastest?

A) Venus B) Mars C) Earth D) Mercury

Q360. What protects Earth from harmful solar radiation?

A) Ozone layer B) Magnetic field C) Clouds D) Oceans

Q361. Which vitamin is necessary for vision?

A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D

Q362. Which organ regulates blood sugar?

A) Liver B) Pancreas C) Kidney D) Heart

Q363. Which organ filters blood to remove urea?

A) Liver B) Kidney C) Heart D) Lungs

Q364. Which energy source is renewable?

A) Coal B) Solar C) Petroleum D) Natural gas

Q365. Which gas causes acid rain?

A) Oxygen B) Nitrogen C) Sulfur dioxide D) Helium

Q366. Which organ is called the powerhouse of the cell?

A) Nucleus B) Mitochondria C) Ribosome D) Chloroplast

Q367. Which planet rotates retrograde?

A) Mercury B) Venus C) Mars D) Jupiter

Q368. Which planet has faint rings?

A) Mars B) Uranus C) Earth D) Venus

Q369. Which gas is produced during fermentation?

A) Oxygen B) Hydrogen C) Carbon dioxide D) Nitrogen

Q370. Which vitamin prevents rickets?

A) Vitamin A B) Vitamin D C) Vitamin C D) Vitamin K

Q371. Which organ secretes digestive enzymes into the small intestine?

A) Liver B) Pancreas C) Kidney D) Stomach

Q372. Which vitamin is synthesized in the skin when exposed to sunlight?

A) Vitamin A B) Vitamin D C) Vitamin C D) Vitamin K

Q373. Which organ regulates metabolism?

A) Liver B) Thyroid C) Pancreas D) Adrenal

Q374. Which planet rotates fastest?

A) Earth B) Jupiter C) Mars D) Venus

Q375. Which blood cells help in clotting?

A) RBC B) WBC C) Platelets D) Plasma

Q376. Which planet is called the Morning Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q377. Which organ produces insulin?

A) Liver B) Pancreas C) Kidney D) Heart

Q378. Which planet is known as the Blue Planet?

A) Mercury B) Venus C) Earth D) Neptune

Q379. Which gas is necessary for photosynthesis?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q380. Which planet has the largest diameter?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q381. Which organ stores bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q382. Which vitamin is necessary for blood clotting?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q383. Which organ is the seat of intelligence?

A) Cerebellum B) Cerebrum C) Medulla D) Pons

Q384. Which gas is most abundant in Earth’s atmosphere?

A) Oxygen B) Nitrogen C) Carbon dioxide D) Helium

Q385. Which is the lightest element?

A) Helium B) Lithium C) Hydrogen D) Oxygen

Q386. Which is the closest planet to the Sun?

A) Venus B) Earth C) Mercury D) Mars

Q387. What is the source of energy for Earth?

A) Moon B) Sun C) Mars D) Jupiter

Q388. Which pigment is responsible for photosynthesis?

A) Carotene B) Xanthophyll C) Chlorophyll D) Anthocyanin

Q389. Which layer protects Earth from UV rays?

A) Troposphere B) Ozone layer C) Stratosphere D) Mesosphere

Q390. In which medium does sound travel fastest?

A) Air B) Solid C) Water D) Vacuum

Q391. Which vitamin prevents scurvy?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q392. Which planet is the Red Planet?

A) Mars B) Venus C) Mercury D) Jupiter

Q393. Which planet rotates slowest?

A) Mercury B) Venus C) Mars D) Jupiter

Q394. Which organ regulates blood sugar?

A) Liver B) Pancreas C) Kidney D) Heart

Q395. Which planet rotates fastest?

A) Earth B) Jupiter C) Mars D) Venus

Q396. Which organ is called the powerhouse of the cell?

A) Nucleus B) Mitochondria C) Ribosome D) Chloroplast

Q397. Which planet has faint rings?

A) Mars B) Uranus C) Earth D) Venus

Q398. Which gas is produced during fermentation?

A) Oxygen B) Hydrogen C) Carbon dioxide D) Nitrogen

Q399. Which vitamin prevents rickets?

A) Vitamin A B) Vitamin D C) Vitamin C D) Vitamin K

Q400. Which organ secretes digestive enzymes into the small intestine?

A) Liver B) Pancreas C) Kidney D) Stomach

Q401. Which planet is called the Morning Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q402. Which organ produces insulin?

A) Liver B) Pancreas C) Kidney D) Heart

Q403. Which planet is closest to the Earth on average?

A) Venus B) Mars C) Mercury D) Jupiter

Q404. Which planet has the largest diameter?

A) Saturn B) Jupiter C) Uranus D) Neptune

Q405. Which organ regulates blood sugar?

A) Liver B) Pancreas C) Kidney D) Heart

Q406. Which vitamin prevents scurvy?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q407. Which gas causes acid rain?

A) Oxygen B) Nitrogen C) Sulfur dioxide D) Helium

Q408. Which planet rotates fastest?

A) Earth B) Jupiter C) Mars D) Venus

Q409. Which organ is called the powerhouse of the cell?

A) Nucleus B) Mitochondria C) Ribosome D) Chloroplast

Q410. Which gas is necessary for photosynthesis?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q411. Which organ filters blood to remove urea?

A) Liver B) Kidney C) Heart D) Lungs

Q412. Which planet rotates retrograde?

A) Mercury B) Venus C) Mars D) Jupiter

Q413. Which vitamin is necessary for vision?

A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D

Q414. Which organ stores bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q415. Which energy source is renewable?

A) Coal B) Solar C) Petroleum D) Natural gas

Q416. Which organ produces bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q417. Which blood cells help in clotting?

A) RBC B) WBC C) Platelets D) Plasma

Q418. Which organ regulates metabolism?

A) Liver B) Thyroid C) Pancreas D) Adrenal

Q419. Which vitamin is necessary for blood clotting?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q420. Which planet rotates the slowest?

A) Mercury B) Venus C) Mars D) Jupiter

Q421. Which planet is known as the Gas Giant?

A) Earth B) Jupiter C) Mars D) Venus

Q422. Which planet is called the Red Planet?

A) Mars B) Venus C) Mercury D) Jupiter

Q423. Which planet is called the Blue Planet?

A) Mercury B) Venus C) Earth D) Neptune

Q424. Which planet has faint rings?

A) Mars B) Uranus C) Earth D) Venus

Q425. Which planet has extreme surface temperature variations?

A) Mercury B) Venus C) Mars D) Jupiter

Q426. Which gas is produced during fermentation?

A) Oxygen B) Hydrogen C) Carbon dioxide D) Nitrogen

Q427. Which vitamin prevents rickets?

A) Vitamin A B) Vitamin D C) Vitamin C D) Vitamin K

Q428. Which organ secretes digestive enzymes into the small intestine?

A) Liver B) Pancreas C) Kidney D) Stomach

Q429. Which vitamin is synthesized in the skin when exposed to sunlight?

A) Vitamin A B) Vitamin D C) Vitamin C D) Vitamin K

Q430. Which organ is the seat of intelligence?

A) Cerebellum B) Cerebrum C) Medulla D) Pons

Q431. Which gas is used in balloons safely?

A) Hydrogen B) Helium C) Oxygen D) Nitrogen

Q432. Which energy is stored in food?

A) Kinetic energy B) Potential energy C) Chemical energy D) Thermal energy

Q433. Which planet has the highest surface temperature?

A) Mercury B) Venus C) Mars D) Jupiter

Q434. Which organ filters blood to remove urea?

A) Liver B) Kidney C) Heart D) Lungs

Q435. Which planet rotates retrograde?

A) Mercury B) Venus C) Mars D) Jupiter

Q436. Which planet is closest to the Sun?

A) Mercury B) Venus C) Earth D) Mars

Q437. Which planet rotates fastest in the solar system?

A) Earth B) Jupiter C) Mars D) Venus

Q438. Which organ produces insulin?

A) Liver B) Pancreas C) Kidney D) Heart

Q439. Which vitamin prevents scurvy?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q440. Which organ stores bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q441. Which blood cells help fight infections?

A) RBC B) WBC C) Platelets D) Plasma

Q442. Which planet rotates the slowest?

A) Mercury B) Venus C) Mars D) Jupiter

Q443. Which organ regulates metabolism?

A) Liver B) Thyroid C) Pancreas D) Adrenal

Q444. Which vitamin is necessary for vision?

A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D

Q445. Which planet is called the Morning Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q446. Which planet has faint rings?

A) Mars B) Uranus C) Earth D) Venus

Q447. Which planet has extreme surface temperature variations?

A) Mercury B) Venus C) Mars D) Jupiter

Q448. Which gas is necessary for photosynthesis?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q449. Which planet is called the Red Planet?

A) Mars B) Venus C) Mercury D) Jupiter

Q450. Which organ secretes digestive enzymes into the small intestine?

A) Liver B) Pancreas C) Kidney D) Stomach

Q451. Which planet is closest to the Earth on average?

A) Venus B) Mars C) Mercury D) Jupiter

Q452. Which organ produces insulin?

A) Liver B) Pancreas C) Kidney D) Heart

Q453. Which vitamin prevents rickets?

A) Vitamin A B) Vitamin D C) Vitamin C D) Vitamin K

Q454. Which blood cells help in clotting?

A) RBC B) WBC C) Platelets D) Plasma

Q455. Which planet rotates the fastest?

A) Earth B) Jupiter C) Mars D) Venus

Q456. Which organ filters blood to remove urea?

A) Liver B) Kidney C) Heart D) Lungs

Q457. Which vitamin is necessary for vision?

A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D

Q458. Which organ regulates metabolism?

A) Liver B) Thyroid C) Pancreas D) Adrenal

Q459. Which gas is necessary for photosynthesis?

A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q460. Which planet is called the Red Planet?

A) Mars B) Venus C) Mercury D) Jupiter

Q461. Which planet rotates retrograde?

A) Mercury B) Venus C) Mars D) Jupiter

Q462. Which planet is known as the Gas Giant?

A) Earth B) Jupiter C) Mars D) Venus

Q463. Which planet has faint rings?

A) Mars B) Uranus C) Earth D) Venus

Q464. Which organ is the seat of intelligence?

A) Cerebellum B) Cerebrum C) Medulla D) Pons

Q465. Which organ stores bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q466. Which gas causes acid rain?

A) Oxygen B) Nitrogen C) Sulfur dioxide D) Helium

Q467. Which energy is stored in food?

A) Kinetic energy B) Potential energy C) Chemical energy D) Thermal energy

Q468. Which vitamin is necessary for blood clotting?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q469. Which organ secretes digestive enzymes into the small intestine?

A) Liver B) Pancreas C) Kidney D) Stomach

Q470. Which organ produces bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q471. Which planet has extreme surface temperature variations?

A) Mercury B) Venus C) Mars D) Jupiter

Q472. Which gas is produced during fermentation?

A) Oxygen B) Hydrogen C) Carbon dioxide D) Nitrogen

Q473. Which vitamin prevents scurvy?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q474. Which gas is necessary for human respiration?

A) Carbon dioxide B) Oxygen C) Nitrogen D) Hydrogen

Q475. Which organ regulates blood sugar?

A) Liver B) Pancreas C) Kidney D) Heart

Q476. Which planet rotates the slowest?

A) Mercury B) Venus C) Mars D) Jupiter

Q477. Which planet is the Blue Planet?

A) Mercury B) Venus C) Earth D) Neptune

Q478. Which planet is called the Morning Star?

A) Venus B) Mars C) Mercury D) Jupiter

Q479. Which organ filters blood to remove urea?

A) Liver B) Kidney C) Heart D) Lungs

Q480. Which organ is called the powerhouse of the cell?

A) Nucleus B) Mitochondria C) Ribosome D) Chloroplast

Q481. Which blood cells fight infections?

A) RBC B) WBC C) Platelets D) Plasma

Q482. Which planet rotates retrograde?

A) Mercury B) Venus C) Mars D) Jupiter

Q483. Which vitamin is necessary for blood clotting?

A) Vitamin A B) Vitamin C C) Vitamin D D) Vitamin K

Q484. Which organ produces bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q485. Which energy is stored in food?

A) Kinetic energy B) Potential energy C) Chemical energy D) Thermal energy

Q486. Which planet rotates fastest?

A) Earth B) Jupiter C) Mars D) Venus

Q487. Which gas causes acid rain?

A) Oxygen B) Nitrogen C) Sulfur dioxide D) Helium

Q488. Which planet has the longest day?

A) Mercury B) Venus C) Mars D) Jupiter

Q489. Which organ secretes digestive enzymes into the small intestine?

A) Liver B) Pancreas C) Kidney D) Stomach

Q490. Which is the hardest natural substance?

A) Graphite B) Quartz C) Diamond D) Iron

Q491. Which planet has a dense CO₂ atmosphere?

A) Mercury B) Venus C) Mars D) Jupiter

Q492. Which organ stores bile?

A) Liver B) Gallbladder C) Pancreas D) Stomach

Q493. Which planet is called the Blue Planet?

A) Mercury B) Venus C) Earth D) Neptune

Q494. Which planet has a faint ring system?

A) Mars B) Uranus C) Earth D) Venus

Q495. Which planet is closest to Earth on average?

A) Venus B) Mars C) Mercury D) Jupiter

Q496. Which energy source is renewable?

A) Coal B) Solar C) Petroleum D) Natural gas

Q497. Which is the main component of natural gas?

A) Methane B) Carbon dioxide C) Nitrogen D) Hydrogen

Q498. Which layer of the Earth is solid?

A) Crust B) Outer core C) Mantle D) Inner core

Q499. Which process converts water vapor into liquid water?

A) Evaporation B) Condensation C) Sublimation D) Freezing

Q500. Which organ regulates metabolism?

A) Liver B) Thyroid C) Pancreas D) Adrenal