1. Which vitamin is produced in the body by sunlight?
A) Vitamin A
B) Vitamin C
C) Vitamin D ✅
D) Vitamin K
📘 UV rays help synthesize Vitamin D in the skin.
2. SI unit of force is:
A) Joule
B) Newton ✅
C) Watt
D) Pascal
📘 1 Newton = 1 kg·m/s².
3. Which gas is most abundant in Earth’s atmosphere?
A) Oxygen
B) Carbon Dioxide
C) Nitrogen ✅
D) Hydrogen
📘 Nitrogen constitutes ~78% of air.
4. Plant cells differ from animal cells in having:
A) Nucleus
B) Mitochondria
C) Cell wall ✅
D) Cytoplasm
📘 Cell walls provide structure and are absent in animals.
5. What is the atomic number of Oxygen?
A) 6
B) 7
C) 8 ✅
D) 10
📘 Oxygen’s atomic number is 8.
6. Blood is filtered in the human body by:
A) Liver
B) Heart
C) Kidney ✅
D) Lungs
📘 Kidneys filter waste from blood.
7. Chemical formula of water is:
A) H₂O ✅
B) HO
C) H₂O₂
D) OH
📘 Two hydrogen atoms and one oxygen atom.
8. The process of conversion of gas into liquid is called:
A) Condensation ✅
B) Evaporation
C) Sublimation
D) Fusion
📘 Occurs when vapor cools down.
9. pH scale measures:
A) Temperature
B) Acidity/Alkalinity ✅
C) Salinity
D) Pressure
📘 Ranges from 0 (acidic) to 14 (basic); 7 is neutral.
10. The fastest planet in the solar system is:
A) Earth
B) Mars
C) Mercury ✅
D) Jupiter
📘 Mercury completes one orbit in 88 days.
11. Which part of the eye controls the amount of light?
A) Retina
B) Cornea
C) Iris ✅
D) Lens
📘 The iris adjusts the size of the pupil.
12. Which is the lightest gas?
A) Helium
B) Hydrogen ✅
C) Oxygen
D) Methane
📘 Hydrogen is the lightest and most abundant element.
13. DNA stands for:
A) Dioxyribose nucleic acid
B) Deoxyribonucleic acid ✅
C) Dual nucleotide acid
D) None of the above
📘 DNA carries genetic information.
14. Which vitamin helps in blood clotting?
A) Vitamin C
B) Vitamin K ✅
C) Vitamin A
D) Vitamin E
📘 Vitamin K helps make clotting factors.
15. The hardest natural substance is:
A) Iron
B) Diamond ✅
C) Gold
D) Quartz
📘 Diamond ranks 10 on Mohs scale.
16. Which organ is affected by jaundice?
A) Kidney
B) Liver ✅
C) Heart
D) Lung
📘 Jaundice causes yellowing of skin due to liver dysfunction.
17. Which blood group is universal recipient?
A) O
B) AB+ ✅
C) B+
D) A+
📘 AB+ can receive from all groups.
18. Newton’s third law is:
A) F = ma
B) Energy is conserved
C) Every action has an equal and opposite reaction ✅
D) V = IR
📘 Fundamental law of motion.
19. The green pigment in plants is:
A) Hemoglobin
B) Chlorophyll ✅
C) Carotene
D) Xanthophyll
📘 Chlorophyll captures sunlight for photosynthesis.
20. Which of the following is not a conductor?
A) Silver
B) Copper
C) Plastic ✅
D) Aluminium
📘 Plastics are insulators.
21. Who discovered penicillin?
A) Isaac Newton
B) Marie Curie
C) Alexander Fleming ✅
D) Louis Pasteur
📘 Discovered in 1928 from a fungus.
22. Which disease is caused by a virus?
A) Tuberculosis
B) Malaria
C) AIDS ✅
D) Typhoid
📘 HIV causes AIDS.
23. Which metal is liquid at room temperature?
A) Iron
B) Mercury ✅
C) Aluminium
D) Tin
📘 Mercury is liquid at ~25°C.
24. The number of bones in the adult human body is:
A) 200
B) 206 ✅
C) 208
D) 215
📘 Includes 22 skull bones and 26 vertebrae.
25. Which device is used to measure atmospheric pressure?
A) Thermometer
B) Barometer ✅
C) Hygrometer
D) Anemometer
📘 Barometer was invented by Torricelli.
26. Which is the largest organ in the human body?
A) Liver
B) Brain
C) Heart
D) Skin ✅
📘 The skin protects the body and regulates temperature.
27. Which particle has a negative charge?
A) Proton
B) Neutron
C) Electron ✅
D) Alpha particle
📘 Electrons orbit the nucleus and carry negative charge.
28. Which element is used in thermometers?
A) Water
B) Alcohol
C) Mercury ✅
D) Helium
📘 Mercury expands with temperature and is visible.
29. Sound cannot travel through:
A) Air
B) Water
C) Steel
D) Vacuum ✅
📘 Sound needs a medium; cannot travel through vacuum.
30. Blood pressure is measured using:
A) Thermometer
B) Barometer
C) Sphygmomanometer ✅
D) Stethoscope
📘 Measures systolic and diastolic pressure.
31. The major component of LPG is:
A) Methane
B) Ethane
C) Butane ✅
D) Acetylene
📘 LPG is primarily butane with some propane.
32. The human brain is protected by:
A) Skull ✅
B) Spine
C) Ribs
D) Cartilage
📘 The skull forms a hard protective case for the brain.
33. The instrument used to measure earthquake intensity is:
A) Barometer
B) Seismograph ✅
C) Manometer
D) Anemometer
📘 Seismographs record ground motion during quakes.
34. Which element is essential for tooth and bone formation?
A) Iron
B) Calcium ✅
C) Magnesium
D) Potassium
📘 Calcium makes bones strong; deficiency causes osteoporosis.
35. Which gas do plants release during photosynthesis?
A) CO₂
B) O₂ ✅
C) H₂
D) N₂
📘 Plants take in CO₂ and release O₂.
36. The universal gravitational constant is denoted by:
A) g
B) G ✅
C) F
D) M
📘 G = 6.674×10⁻¹¹ N·m²/kg²
37. Which part of the plant absorbs water?
A) Leaf
B) Flower
C) Root ✅
D) Stem
📘 Roots have root hairs that absorb water and nutrients.
38. Which vitamin is mainly found in citrus fruits?
A) Vitamin A
B) Vitamin B
C) Vitamin C ✅
D) Vitamin D
📘 Vitamin C boosts immunity and prevents scurvy.
39. The main function of white blood cells is:
A) Oxygen transport
B) Clotting
C) Fighting infections ✅
D) Digestion
📘 WBCs are part of the immune system.
40. Which one is a noble gas?
A) Nitrogen
B) Oxygen
C) Neon ✅
D) Hydrogen
📘 Neon is inert and used in lights.
41. The chemical symbol of Iron is:
A) Fe ✅
B) Ir
C) In
D) I
📘 Fe comes from Latin Ferrum.
42. The unit of energy is:
A) Pascal
B) Volt
C) Joule ✅
D) Newton
📘 1 Joule = work done when 1 Newton force moves 1 meter.
43. Which hormone regulates metabolism?
A) Insulin
B) Adrenaline
C) Thyroxine ✅
D) Estrogen
📘 Produced by thyroid gland.
44. The pancreas produces:
A) Bile
B) Insulin ✅
C) Saliva
D) Adrenaline
📘 Insulin regulates blood sugar.
45. Which law states “energy can neither be created nor destroyed”?
A) Newton’s First Law
B) Ohm’s Law
C) Law of Conservation of Energy ✅
D) Archimedes’ Principle
📘 Energy transforms but remains constant.
46. Boiling point of water in Kelvin is:
A) 273 K
B) 298 K
C) 373 K ✅
D) 212 K
📘 0°C = 273 K; 100°C = 373 K.
47. The lens used to treat hypermetropia is:
A) Concave
B) Convex ✅
C) Plano-concave
D) Cylindrical
📘 Convex lenses help focus distant objects.
48. The study of heredity is called:
A) Ecology
B) Cytology
C) Genetics ✅
D) Anatomy
📘 Genetics studies inheritance and DNA.
49. Which gas is used for artificial ripening of fruits?
A) Ethylene ✅
B) CO₂
C) Ammonia
D) Methane
📘 Ethylene accelerates ripening.
50. Which is the largest cell in the human body?
A) RBC
B) Neuron
C) Egg (Ovum) ✅
D) Muscle cell
📘 Human egg cell is visible without microscope.
51. What is the normal pH range of human blood?
A) 6.5–7.0
B) 7.0–7.2
C) 7.35–7.45 ✅
D) 8.0–9.0
📘 Human blood is slightly alkaline to maintain proper cell function.
52. Which vitamin helps in improving vision?
A) Vitamin A ✅
B) Vitamin B
C) Vitamin C
D) Vitamin K
📘 Deficiency of Vitamin A causes night blindness.
53. Which part of the cell contains genetic material?
A) Ribosome
B) Cytoplasm
C) Nucleus ✅
D) Golgi body
📘 The nucleus contains chromosomes made of DNA.
54. Which metal is most reactive?
A) Gold
B) Silver
C) Sodium ✅
D) Mercury
📘 Sodium reacts violently with water and air.
55. Which organ controls body temperature?
A) Pituitary gland
B) Heart
C) Lungs
D) Hypothalamus ✅
📘 The hypothalamus in the brain regulates body temp.
56. Which process is responsible for cloud formation?
A) Evaporation
B) Sublimation
C) Condensation ✅
D) Transpiration
📘 Water vapor condenses into droplets to form clouds.
57. The device that converts sound energy into electrical energy is:
A) Speaker
B) Motor
C) Microphone ✅
D) Bulb
📘 Microphones convert sound waves into electric signals.
58. Which part of the brain controls voluntary actions?
A) Cerebellum
B) Medulla
C) Cerebrum ✅
D) Pons
📘 Cerebrum manages reasoning, memory, movement.
59. Which mineral is essential for hemoglobin?
A) Calcium
B) Iron ✅
C) Magnesium
D) Potassium
📘 Hemoglobin binds oxygen using iron.
60. What is the main component of biogas?
A) Ethane
B) Methane ✅
C) Carbon dioxide
D) Butane
📘 Biogas contains ~60% methane, used as fuel.
61. Which of the following is not a greenhouse gas?
A) Methane
B) Carbon dioxide
C) Nitrogen ✅
D) Ozone
📘 Nitrogen is inert and doesn't trap heat.
62. Which instrument measures humidity?
A) Barometer
B) Thermometer
C) Hygrometer ✅
D) Manometer
📘 A hygrometer measures moisture in the air.
63. What is the process of conversion of solid directly into gas?
A) Condensation
B) Evaporation
C) Sublimation ✅
D) Deposition
📘 Sublimation occurs in substances like camphor or dry ice.
64. Which vitamin prevents rickets?
A) Vitamin A
B) Vitamin D ✅
C) Vitamin C
D) Vitamin E
📘 Vitamin D helps calcium absorption for strong bones.
65. Which is the largest planet in the solar system?
A) Earth
B) Saturn
C) Jupiter ✅
D) Neptune
📘 Jupiter is the largest, with a diameter over 142,000 km.
66. Which compound is used in toothpaste to prevent cavities?
A) Sodium chloride
B) Calcium carbonate
C) Fluoride ✅
D) Magnesium sulfate
📘 Fluoride strengthens tooth enamel.
67. Which is a communicable disease?
A) Cancer
B) Diabetes
C) Typhoid ✅
D) Hypertension
📘 Typhoid is spread through contaminated food/water.
68. Which gas is used in fire extinguishers?
A) Nitrogen
B) CO₂ ✅
C) Oxygen
D) Helium
📘 CO₂ suffocates flames and displaces oxygen.
69. Who is known as the “Father of Genetics”?
A) Darwin
B) Mendel ✅
C) Watson
D) Lamarck
📘 Gregor Mendel studied inheritance in pea plants.
70. Which instrument is used to measure electric current?
A) Voltmeter
B) Ammeter ✅
C) Galvanometer
D) Thermometer
📘 Ammeter measures current in amperes.
71. Which system in the body controls reflex actions?
A) Endocrine system
B) Digestive system
C) Central nervous system ✅
D) Circulatory system
📘 Reflexes are handled by spinal cord (CNS).
72. Which of the following is a basic taste?
A) Sour
B) Bitter
C) Salty
D) All of the above ✅
📘 The tongue can detect sweet, sour, salty, bitter, and umami.
73. Which part of the ear maintains balance?
A) Ear canal
B) Cochlea
C) Semicircular canals ✅
D) Tympanic membrane
📘 Semicircular canals sense body movement and balance.
74. Which gas is filled in electric bulbs?
A) Nitrogen ✅
B) Hydrogen
C) Oxygen
D) Neon
📘 Nitrogen prevents oxidation of tungsten filament.
75. What is the scientific name of the human being?
A) Homo erectus
B) Homo sapiens ✅
C) Australopithecus
D) Neanderthal
📘 Homo sapiens means "wise man" in Latin.
76. Which part of the plant is responsible for reproduction?
A) Root
B) Stem
C) Leaf
D) Flower ✅
📘 Flowers contain reproductive organs — stamens and carpels.
77. Which of the following causes malaria?
A) Virus
B) Bacteria
C) Protozoa ✅
D) Fungi
📘 Plasmodium (a protozoa) spread by Anopheles mosquitoes.
78. What is the full form of DNA?
A) Di-nucleic acid
B) Deoxyribonucleic acid ✅
C) Double nitrogen acid
D) None
📘 DNA stores genetic information in all living organisms.
79. Which blood cells help in clotting?
A) RBC
B) WBC
C) Platelets ✅
D) Plasma
📘 Platelets release clotting factors to stop bleeding.
80. Acid rain is caused by:
A) CO₂ and CO
B) SO₂ and NO₂ ✅
C) H₂S and CO₂
D) O₃ and CO
📘 Sulfur and nitrogen oxides react with water to form acids.
81. The outermost layer of the Earth is called:
A) Mantle
B) Core
C) Crust ✅
D) Lithosphere
📘 The crust is the thin outer layer we live on.
82. Which metal is used in galvanization?
A) Iron
B) Zinc ✅
C) Tin
D) Lead
📘 Zinc coating prevents rusting of iron.
83. Which gas is known as laughing gas?
A) Nitric oxide
B) Nitrous oxide ✅
C) Carbon monoxide
D) Methane
📘 N₂O has anesthetic and euphoric effects.
84. Which organ purifies blood in the human body?
A) Liver
B) Heart
C) Kidney ✅
D) Pancreas
📘 Kidneys filter waste products and balance fluids.
85. In which organ is bile produced?
A) Kidney
B) Gallbladder
C) Liver ✅
D) Pancreas
📘 Bile helps in digestion of fats.
86. What is the main function of the large intestine?
A) Digestion
B) Absorption of nutrients
C) Water absorption ✅
D) Protein synthesis
📘 It absorbs water and forms solid waste (feces).
87. What is the chemical name of baking soda?
A) Sodium carbonate
B) Sodium bicarbonate ✅
C) Calcium carbonate
D) Sodium hydroxide
📘 NaHCO₃ is used in baking and as an antacid.
88. Which of these is a chemical change?
A) Melting of ice
B) Boiling of water
C) Rusting of iron ✅
D) Breaking of glass
📘 Rusting forms a new substance — iron oxide.
89. The atomic number of carbon is:
A) 5
B) 6 ✅
C) 7
D) 8
📘 Carbon (C) has 6 protons and is basis of organic life.
90. Which part of the body is affected by bronchitis?
A) Liver
B) Kidney
C) Lungs ✅
D) Brain
📘 Bronchitis is inflammation of the bronchial tubes in lungs.
91. Which gas is responsible for the green color of plants?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) None – it's due to chlorophyll ✅
📘 Chlorophyll pigment gives plants their green color.
92. What is the function of mitochondria?
A) Protein synthesis
B) DNA replication
C) Energy production ✅
D) Blood filtration
📘 Known as the "powerhouse" of the cell; produces ATP.
93. How many pairs of chromosomes are in human cells?
A) 22
B) 23 ✅
C) 24
D) 46
📘 Humans have 23 pairs (46 total chromosomes).
94. What is the full form of AIDS?
A) Acquired Immune Deficiency Syndrome ✅
B) Acute Infection Disorder Syndrome
C) Auto Immunity Disease Symptoms
D) None
📘 Caused by HIV virus, it weakens the immune system.
95. Which law is related to electromagnetic induction?
A) Ohm’s Law
B) Newton’s Law
C) Faraday’s Law ✅
D) Ampere’s Law
📘 Faraday discovered that changing magnetic fields induce current.
96. Which vitamin is synthesized in the human intestine?
A) Vitamin C
B) Vitamin K ✅
C) Vitamin A
D) Vitamin D
📘 Bacteria in the large intestine produce Vitamin K.
97. Which part of the brain regulates heartbeat and respiration?
A) Cerebrum
B) Cerebellum
C) Medulla oblongata ✅
D) Hypothalamus
📘 The medulla controls involuntary functions like breathing.
98. Which of these is not a fossil fuel?
A) Coal
B) Petroleum
C) Natural Gas
D) Uranium ✅
📘 Uranium is used in nuclear power, not formed from fossils.
99. Which disease is caused by deficiency of iodine?
A) Scurvy
B) Goitre ✅
C) Rickets
D) Pellagra
📘 Iodine is essential for thyroid hormone production.
100. Which acid is present in lemon?
A) Acetic acid
B) Oxalic acid
C) Citric acid ✅
D) Tartaric acid
📘 Citric acid gives lemons their sour taste.
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