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Science MCQs (English Medium)
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1. The instrument used to measure blood pressure is:
a. Thermometer
b. Sphygmomanometer
c. Lactometer
d. Hygrometer
2. Which vitamin contains cobalt?
a. Vitamin B1
b. Vitamin B6
c. Vitamin B12
d. Vitamin C
3. The SI unit of frequency is:
a. Hertz
b. Joule
c. Watt
d. Newton
4. Which part of the eye controls the amount of light entering it?
a. Retina
b. Cornea
c. Iris
d. Lens
5. The gas used in electric bulbs is:
a. Nitrogen
b. Argon
c. Hydrogen
d. Oxygen
6. The common name of calcium sulphate hemihydrate is:
a. Bleaching Powder
b. Plaster of Paris
c. Baking Soda
d. Washing Soda
7. Which blood vessel carries oxygenated blood from lungs to heart?
a. Pulmonary Artery
b. Vena Cava
c. Aorta
d. Pulmonary Vein
8. Unit of electrical resistance is:
a. Volt
b. Ampere
c. Ohm
d. Watt
9. Which metal is extracted from bauxite?
a. Iron
b. Aluminium
c. Copper
d. Zinc
10. The normal human body temperature is:
a. 35°C
b. 36°C
c. 37°C
d. 38°C
11. Which gland is known as the master gland?
a. Thyroid
b. Pituitary
c. Adrenal
d. Pancreas
12. The chemical formula of ozone is:
a. O
b. O₂
c. O₃
d. O₄
13. Which law states that pressure applied to a liquid is transmitted equally in all directions?
a. Archimedes’ Principle
b. Pascal’s Law
c. Boyle’s Law
d. Charles’ Law
14. The deficiency of Vitamin D causes:
a. Scurvy
b. Beriberi
c. Rickets
d. Goitre
15. Which gas is known as laughing gas?
a. NO
b. N₂O
c. NO₂
d. NH₃
16. The unit of power of a lens is:
a. Dioptre
b. Candela
c. Lux
d. Tesla
17. Which organ stores bile?
a. Liver
b. Pancreas
c. Gall Bladder
d. Spleen
18. The atomic number of Carbon is:
a. 4
b. 5
c. 6
d. 7
19. Which colour has the longest wavelength?
a. Violet
b. Blue
c. Green
d. Red
20. The study of insects is called:
a. Entomology
b. Ornithology
c. Mycology
d. Ecology
21. The pH of human blood is approximately:
a. 6.8
b. 7.4
c. 8.5
d. 9.0
22. Which acid is present in ant sting?
a. Acetic Acid
b. Citric Acid
c. Formic Acid
d. Oxalic Acid
23. Which scientist discovered penicillin?
a. Edward Jenner
b. Alexander Fleming
c. Louis Pasteur
d. Robert Koch
24. The working substance in a thermometer is generally:
a. Mercury
b. Copper
c. Iron
d. Zinc
25. Which blood group is called universal recipient?
a. O−
b. O+
c. AB+
d. AB−
26. Which element is essential for haemoglobin formation?
a. Calcium
b. Iron
c. Sodium
d. Potassium
27. The refractive index of vacuum is:
a. 0
b. 1
c. 1.5
d. Infinite
28. Which disease is caused by deficiency of Vitamin B1?
a. Beriberi
b. Scurvy
c. Rickets
d. Pellagra
29. The unit of work is:
a. Newton
b. Joule
c. Watt
d. Pascal
30. The process of cell division producing four daughter cells is:
a. Mitosis
b. Binary Fission
c. Meiosis
d. Budding
31. Which gas is responsible for acid rain?
a. Oxygen
b. Sulphur Dioxide
c. Hydrogen
d. Nitrogen
32. The smallest bone in the human body is:
a. Femur
b. Tibia
c. Stapes
d. Fibula
33. Which metal is used in thermometers?
a. Copper
b. Mercury
c. Silver
d. Zinc
34. The unit of force is:
a. Joule
b. Watt
c. Newton
d. Volt
35. Which vitamin deficiency causes night blindness?
a. Vitamin A
b. Vitamin B
c. Vitamin C
d. Vitamin D
36. The chemical formula of common salt is:
a. KCl
b. NaCl
c. Na₂CO₃
d. NaOH
37. Which blood cells help in clotting?
a. RBC
b. WBC
c. Platelets
d. Plasma
38. The SI unit of pressure is:
a. Newton
b. Joule
c. Pascal
d. Watt
39. Which organelle is called the suicidal bag of the cell?
a. Ribosome
b. Golgi Body
c. Lysosome
d. Vacuole
40. The gas used for artificial ripening of fruits is:
a. Ethylene
b. Oxygen
c. Hydrogen
d. Nitrogen
41. Which part of the plant conducts water?
a. Phloem
b. Xylem
c. Cortex
d. Epidermis
42. The SI unit of energy is:
a. Joule
b. Newton
c. Watt
d. Volt
43. Which disease is caused by Plasmodium?
a. Tuberculosis
b. Malaria
c. Cholera
d. Typhoid
44. The chemical symbol of silver is:
a. Ag
b. Au
c. Si
d. Sr
45. Which hormone regulates blood sugar level?
a. Thyroxine
b. Insulin
c. Adrenaline
d. Estrogen
46. Speed of sound in air is approximately:
a. 150 m/s
b. 220 m/s
c. 343 m/s
d. 500 m/s
47. Which vitamin deficiency causes scurvy?
a. Vitamin A
b. Vitamin B
c. Vitamin C
d. Vitamin K
48. The basic unit of life is:
a. Tissue
b. Organ
c. Cell
d. Nucleus
49. Which metal is the best conductor of electricity?
a. Copper
b. Gold
c. Aluminium
d. Silver
50. The study of birds is called:
a. Entomology
b. Ornithology
c. Ecology
d. Taxonomy
51. Which scientist proposed the laws of planetary motion?
a. Galileo
b. Kepler
c. Newton
d. Copernicus
52. The unit of electric charge is:
a. Ampere
b. Volt
c. Coulomb
d. Ohm
53. Which blood group has no antigen on RBCs?
a. A
b. B
c. AB
d. O
54. The chemical name of baking soda is:
a. Sodium Carbonate
b. Sodium Bicarbonate
c. Calcium Carbonate
d. Potassium Carbonate
55. Which vitamin is synthesized by intestinal bacteria?
a. Vitamin A
b. Vitamin D
c. Vitamin K
d. Vitamin E
56. Which law explains floating of ships?
a. Pascal’s Law
b. Archimedes’ Principle
c. Boyle’s Law
d. Hooke’s Law
57. The functional unit of nervous system is:
a. Neuron
b. Nephron
c. Axon
d. Dendrite
58. The pH of lemon juice is approximately:
a. 2
b. 7
c. 9
d. 12
59. Which gas is used in welding?
a. Nitrogen
b. Acetylene
c. Helium
d. Neon
60. The largest artery in the human body is:
a. Pulmonary Artery
b. Coronary Artery
c. Aorta
d. Carotid Artery
61. The SI unit of capacitance is:
a. Henry
b. Farad
c. Tesla
d. Weber
62. Which element is essential for thyroid hormone synthesis?
a. Iron
b. Calcium
c. Iodine
d. Zinc
63. Which scientist gave the cell theory?
a. Darwin
b. Schleiden and Schwann
c. Mendel
d. Pasteur
64. Which gas turns lime water milky?
a. Oxygen
b. Carbon Monoxide
c. Carbon Dioxide
d. Nitrogen
65. The unit of momentum is:
a. kg m/s
b. N/m
c. Joule
d. Pascal
66. Which part of the digestive system absorbs maximum nutrients?
a. Stomach
b. Small Intestine
c. Large Intestine
d. Esophagus
67. The chemical formula of gypsum is:
a. CaSO₄·2H₂O
b. CaCO₃
c. Na₂CO₃
d. NaHCO₃
68. Which disease is caused by deficiency of iron?
a. Rickets
b. Anemia
c. Goitre
d. Scurvy
69. The unit of magnetic field strength is:
a. Tesla
b. Henry
c. Weber
d. Coulomb
70. Which metal is used in storage batteries?
a. Zinc
b. Lead
c. Copper
d. Aluminium
71. The genetic material in most organisms is:
a. RNA
b. Protein
c. DNA
d. Lipid
72. Which scientist discovered neutron?
a. Rutherford
b. Chadwick
c. Bohr
d. Thomson
73. Which enzyme converts starch into maltose?
a. Pepsin
b. Trypsin
c. Amylase
d. Lipase
74. The SI unit of inductance is:
a. Tesla
b. Henry
c. Farad
d. Weber
75. Which acid is present in curd?
a. Citric Acid
b. Acetic Acid
c. Lactic Acid
d. Oxalic Acid
76. The largest cell in the human body is:
a. RBC
b. Neuron
c. Ovum
d. WBC
77. Which phenomenon explains mirage?
a. Reflection
b. Refraction
c. Total Internal Reflection
d. Diffraction
78. Which gas is most abundant in the atmosphere after nitrogen?
a. Oxygen
b. Argon
c. Carbon Dioxide
d. Neon
79. The human heart has:
a. 2 Chambers
b. 3 Chambers
c. 4 Chambers
d. 5 Chambers
80. Which element is used in electric filament bulbs?
a. Iron
b. Tungsten
c. Copper
d. Silver
81. The study of fossils is called:
a. Anthropology
b. Paleontology
c. Cytology
d. Histology
82. Which hormone is called emergency hormone?
a. Insulin
b. Thyroxine
c. Adrenaline
d. Estrogen
83. The SI unit of temperature is:
a. Celsius
b. Fahrenheit
c. Kelvin
d. Rankine
84. Which element is the lightest metal?
a. Sodium
b. Lithium
c. Potassium
d. Magnesium
85. Which organ secretes bile?
a. Pancreas
b. Liver
c. Gall Bladder
d. Spleen
86. The speed of light was first measured by:
a. Galileo
b. Roemer
c. Newton
d. Huygens
87. Which disease is caused by deficiency of Vitamin B3?
a. Pellagra
b. Beriberi
c. Scurvy
d. Rickets
88. Which blood vessel carries deoxygenated blood from heart to lungs?
a. Pulmonary Vein
b. Aorta
c. Pulmonary Artery
d. Vena Cava
89. The chemical symbol of Potassium is:
a. P
b. Po
c. K
d. Pt
90. Which scientist discovered blood circulation?
a. Harvey
b. Jenner
c. Koch
d. Fleming
91. The SI unit of power is:
a. Joule
b. Watt
c. Newton
d. Volt
92. Which pigment gives green colour to plants?
a. Carotene
b. Xanthophyll
c. Chlorophyll
d. Anthocyanin
93. Which gas is used in balloons for meteorological observations?
a. Oxygen
b. Nitrogen
c. Helium
d. Chlorine
94. The normal pH range of blood is:
a. 6.8–7.0
b. 7.35–7.45
c. 8.0–8.5
d. 5.5–6.0
95. Which metal is extracted from cinnabar ore?
a. Lead
b. Zinc
c. Mercury
d. Copper
96. The largest endocrine gland is:
a. Pituitary
b. Pancreas
c. Thyroid
d. Adrenal
97. Which wave can travel through vacuum?
a. Sound Wave
b. Water Wave
c. Electromagnetic Wave
d. Seismic Wave
98. Which organ is affected by hepatitis?
a. Kidney
b. Liver
c. Heart
d. Lung
99. The atomic number of oxygen is:
a. 6
b. 7
c. 8
d. 9
100. Which scientist is known as the Father of Genetics?
a. Darwin
b. Mendel
c. Pasteur
d. Lamarck
101. Which scientist discovered the electron?
a. Rutherford
b. Bohr
c. J.J. Thomson
d. Chadwick
102. The SI unit of work-energy is:
a. Watt
b. Joule
c. Newton
d. Pascal
103. Which vitamin deficiency causes beriberi?
a. Vitamin B1
b. Vitamin B2
c. Vitamin B6
d. Vitamin C
104. The chemical symbol of gold is:
a. Gd
b. Ag
c. Au
d. Go
105. Which gland secretes growth hormone?
a. Thyroid
b. Pituitary
c. Adrenal
d. Pancreas
106. Which instrument is used to measure humidity?
a. Barometer
b. Hygrometer
c. Thermometer
d. Ammeter
107. The hardest naturally occurring substance is:
a. Quartz
b. Graphite
c. Diamond
d. Corundum
108. Which blood cells transport oxygen?
a. WBC
b. Platelets
c. RBC
d. Plasma
109. The SI unit of electric potential difference is:
a. Ohm
b. Coulomb
c. Volt
d. Ampere
110. Which gas is known as marsh gas?
a. Ethane
b. Methane
c. Propane
d. Butane
111. The longest bone in the human body is:
a. Tibia
b. Fibula
c. Humerus
d. Femur
112. Which law relates current, voltage and resistance?
a. Faraday's Law
b. Ohm's Law
c. Lenz's Law
d. Coulomb's Law
113. Which acid is present in tamarind?
a. Formic Acid
b. Tartaric Acid
c. Citric Acid
d. Acetic Acid
114. The study of bacteria is called:
a. Virology
b. Mycology
c. Bacteriology
d. Pathology
115. Which part of the atom contains no charge?
a. Electron
b. Proton
c. Neutron
d. Positron
116. The SI unit of luminous intensity is:
a. Lux
b. Lumen
c. Candela
d. Dioptre
117. Which hormone regulates calcium in blood?
a. Insulin
b. Parathormone
c. Thyroxine
d. Cortisol
118. The chemical formula of ammonia is:
a. NH₂
b. NH₃
c. N₂H₄
d. NO₂
119. Which scientist gave the theory of evolution by natural selection?
a. Lamarck
b. Darwin
c. Mendel
d. Haeckel
120. The SI unit of heat capacity is:
a. J/K
b. J/mol
c. W/K
d. N/K
121. Which element is required for chlorophyll formation?
a. Iron
b. Zinc
c. Magnesium
d. Calcium
122. The largest white blood cells are:
a. Monocytes
b. Basophils
c. Neutrophils
d. Eosinophils
123. Which mirror is used in vehicle rear-view mirrors?
a. Plane Mirror
b. Concave Mirror
c. Convex Mirror
d. Cylindrical Mirror
124. The chemical symbol of tin is:
a. Ti
b. Tn
c. Sn
d. St
125. Which organ produces urine?
a. Liver
b. Kidney
c. Pancreas
d. Spleen
126. Which scientist proposed the atomic theory?
a. Dalton
b. Rutherford
c. Bohr
d. Thomson
127. The SI unit of electric power is:
a. Joule
b. Watt
c. Volt
d. Ohm
128. Which vitamin is also called ascorbic acid?
a. Vitamin A
b. Vitamin B12
c. Vitamin C
d. Vitamin D
129. Which gas is evolved during photosynthesis?
a. Nitrogen
b. Oxygen
c. Carbon Dioxide
d. Hydrogen
130. The structural and functional unit of life is:
a. Organ
b. Tissue
c. Cell
d. Nucleus
131. Which instrument measures earthquake intensity?
a. Anemometer
b. Seismograph
c. Barograph
d. Hygrometer
132. Which metal is the best conductor of heat?
a. Copper
b. Gold
c. Silver
d. Aluminium
133. Which blood component helps in clotting?
a. Plasma
b. RBC
c. WBC
d. Platelets
134. The SI unit of force is:
a. Joule
b. Watt
c. Newton
d. Pascal
135. Which disease is caused by deficiency of iodine?
a. Pellagra
b. Scurvy
c. Goitre
d. Rickets
136. Which acid is present in gastric juice?
a. Sulphuric Acid
b. Nitric Acid
c. Hydrochloric Acid
d. Acetic Acid
137. Which scientist developed the polio vaccine?
a. Edward Jenner
b. Louis Pasteur
c. Jonas Salk
d. Robert Koch
138. Which lens is used to correct myopia?
a. Convex Lens
b. Concave Lens
c. Cylindrical Lens
d. Bifocal Lens
139. The atomic number of hydrogen is:
a. 0
b. 1
c. 2
d. 3
140. Which organ controls and coordinates body activities?
a. Heart
b. Brain
c. Liver
d. Kidney
141. Which scientist discovered radioactivity?
a. Curie
b. Rutherford
c. Becquerel
d. Bohr
142. The SI unit of frequency is:
a. Hertz
b. Joule
c. Newton
d. Pascal
143. Which vitamin is essential for normal vision?
a. Vitamin A
b. Vitamin B
c. Vitamin E
d. Vitamin K
144. Which gas is used in the manufacture of fertilizers through the Haber process?
a. Oxygen
b. Hydrogen
c. Nitrogen
d. Both B and C
145. The human body has how many pairs of ribs?
a. 10
b. 11
c. 12
d. 13
146. Which instrument is used to measure electric current?
a. Voltmeter
b. Ammeter
c. Ohmmeter
d. Galvanometer
147. Which element has the chemical symbol Fe?
a. Fluorine
b. Francium
c. Iron
d. Fermium
148. Which part of the plant is responsible for transpiration?
a. Root
b. Stem
c. Stomata
d. Flower
149. The SI unit of pressure is:
a. Newton
b. Joule
c. Pascal
d. Watt
150. Which scientist is known as the Father of Microbiology?
a. Louis Pasteur
b. Antonie van Leeuwenhoek
c. Robert Hooke
d. Robert Koch