Physics, Chemistry and Biology - Question Bank

1. Which type of energy is stored in a compressed spring?
A) Kinetic energy
B) Thermal energy
C) Potential energy
D) Electrical energy
2. What is the unit of radioactive decay?
A) Gray
B) Sievert
C) Becquerel
D) Curie
3. Which is the largest organ in the human body?
A) Liver
B) Brain
C) Skin
D) Heart
4. What is the process of breaking down food into simpler substances that can be absorbed by the body called?
A) Respiration
B) Circulation
C) Digestion
D) Excretion
5. Which gas is produced during photosynthesis?
A) Carbon Dioxide
B) Oxygen
C) Nitrogen
D) Methane
6. What is the chemical formula for common salt?
A) KCl
B) NaCl
C) CaCl2
D) MgBr2
7. What is the process of adding impurities to a semiconductor to increase its conductivity called?
A) Filtration
B) Diffusion
C) Doping
D) Oxidation
8. Which of the following is an alloy of copper and zinc?
A) Bronze
B) Brass
C) Steel
D) Solder
9. What is the mass per unit volume of a substance called?
A) Density
B) Viscosity
C) Porosity
D) Concentration
10. What is the unit of angular velocity?
A) Meters per second
B) Radians per second
C) Degrees per second
D) Revolutions per minute
11. What is the SI unit of magnetic flux density?
A) Weber
B) Tesla
C) Gauss
D) Farad
12. Which hormone regulates blood sugar levels?
A) Thyroxine
B) Insulin
C) Adrenaline
D) Estrogen
13. What is the main component of bones?
A) Calcium Carbonate
B) Calcium Phosphate
C) Potassium Chloride
D) Sodium Bicarbonate
14. Which type of cells are responsible for immunity in the human body?
A) Red blood cells
B) Platelets
C) White blood cells
D) Nerve cells
15. What is the primary gas that causes the greenhouse effect?
A) Nitrogen
B) Oxygen
C) Carbon Dioxide
D) Hydrogen
16. What is the process by which solid changes directly into gas?
A) Melting
B) Boiling
C) Condensation
D) Sublimation
17. Which of the following is a non-metal that is liquid at room temperature?
A) Mercury
B) Bromine
C) Iodine
D) Chlorine
18. What is the chemical symbol for silver?
A) Si
B) Sn
C) Ag
D) Au
19. What is the unit of pressure?
A) Newton
B) Joule
C) Pascal
D) Watt
20. What is the tendency of an object to remain in its state of rest or uniform motion called?
A) Momentum
B) Velocity
C) Inertia
D) Acceleration
21. Which lens is used to correct myopia (nearsightedness)?
A) Convex lens
B) Concave lens
C) Cylindrical lens
D) Bifocal lens
22. What is the SI unit of frequency?
A) Hertz
B) Decibel
C) Watt
D) Radian
23. What is the process by which organisms grow and repair themselves?
A) Digestion
B) Excretion
C) Reproduction
D) Cellular respiration
24. Which organ in the human body is responsible for pumping blood?
A) Lungs
B) Kidneys
C) Brain
D) Heart
25. What is the scientific study of living organisms called?
A) Geology
B) Astronomy
C) Biology
D) Archaeology
26. Which vitamin is essential for blood clotting?
A) Vitamin A
B) Vitamin C
C) Vitamin K
D) Vitamin D
27. What is the primary function of red blood cells?
A) Fighting infection
B) Clotting blood
C) Transporting oxygen
D) Producing antibodies
28. Which of the following is an example of a base?
A) Vinegar
B) Lemon Juice
C) Soap
D) Milk
29. What is the process of conversion of liquid into vapor called?
A) Condensation
B) Evaporation
C) Sublimation
D) Melting
30. Which element is known as the 'King of Chemicals'?
A) Sodium Hydroxide
B) Sulfuric Acid
C) Hydrochloric Acid
D) Nitric Acid
31. What is the chemical symbol for iron?
A) Ir
B) In
C) Fe
D) Io
32. Which phenomenon causes the blue color of the sky?
A) Absorption of light
B) Scattering of light
C) Reflection of light
D) Refraction of light
33. What is the unit of energy?
A) Newton
B) Joule
C) Watt
D) Pascal
34. What is the property of a substance to resist changes to its state of motion called?
A) Momentum
B) Velocity
C) Inertia
D) Acceleration
35. Which law states that the voltage across a conductor is directly proportional to the current flowing through it, provided all physical conditions and temperature remain the same?
A) Newton's Law
B) Ohm's Law
C) Archimedes' Principle
D) Boyle's Law
36. What is the SI unit of electric current?
A) Volt
B) Ohm
C) Ampere
D) Watt
37. What is the process by which plants release water vapor into the atmosphere?
A) Respiration
B) Photosynthesis
C) Transpiration
D) Absorption
38. Which blood component is responsible for carrying oxygen?
A) Plasma
B) White blood cells
C) Platelets
D) Red blood cells
39. What is the powerhouse of the cell?
A) Nucleus
B) Ribosome
C) Mitochondrion
D) Endoplasmic Reticulum
40. Which part of the plant is responsible for photosynthesis?
A) Root
B) Stem
C) Flower
D) Leaf
41. What is the basic unit of life?
A) Tissue
B) Organ
C) Cell
D) Molecule
42. Which of the following is a noble gas?
A) Oxygen
B) Neon
C) Chlorine
D) Hydrogen
43. What is the pH of pure water?
A) 0
B) 7
C) 14
D) 1
44. Which gas is most abundant in the Earth's atmosphere?
A) Oxygen
B) Carbon Dioxide
C) Nitrogen
D) Argon
45. What is the chemical symbol for gold?
A) Ag
B) Au
C) Fe
D) Pb
46. Which type of mirror is used in a periscope to reverse the image?
A) Concave mirror
B) Convex mirror
C) Plane mirror
D) Parabolic mirror
47. What is the phenomenon of light bending as it passes from one medium to another called?
A) Reflection
B) Diffraction
C) Refraction
D) Polarization
48. According to Newton's first law of motion, an object will continue to do what unless acted upon by an external force?
A) Change its velocity
B) Remain at rest or in uniform motion
C) Accelerate at a constant rate
D) Decrease its momentum
49. What is the unit of power?
A) Joule per second
B) Newton meter
C) Ampere volt
D) Kilogram meter per second
50. Which of the following is a scalar quantity?
A) Velocity
B) Acceleration
C) Speed
D) Force
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