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Monday, 6 April 2026

Natural Science MCQs (651–700) | Advanced Science Questions for Competitive Exams

 

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Natural Science MCQs (651–700) – Page 14


 Advanced & Concept-Based Science MCQs

  1. Which phenomenon explains bending of light in prism?
    a) Reflection
    b) Refraction
    c) Diffraction
    d) Interference
    Answer: b

  2. Which wave requires medium?
    a) Light
    b) X-rays
    c) Sound
    d) Radio waves
    Answer: c

  3. Which is vector quantity?
    a) Speed
    b) Time
    c) Velocity
    d) Distance
    Answer: c

  4. SI unit of current:
    a) Volt
    b) Ampere
    c) Ohm
    d) Watt
    Answer: b

  5. Which law is F = ma?
    a) Newton’s First Law
    b) Newton’s Second Law
    c) Newton’s Third Law
    d) Ohm’s Law
    Answer: b

  6. Best conductor of electricity:
    a) Copper
    b) Silver
    c) Aluminium
    d) Iron
    Answer: b

  7. Which element is alkali metal?
    a) Calcium
    b) Sodium
    c) Iron
    d) Zinc
    Answer: b

  8. Which acid present in lemon?
    a) Lactic acid
    b) Citric acid
    c) Acetic acid
    d) Sulfuric acid
    Answer: b

  9. Which is noble gas?
    a) Oxygen
    b) Nitrogen
    c) Helium
    d) Hydrogen
    Answer: c

  10. Which process converts liquid to gas?
    a) Condensation
    b) Evaporation
    c) Freezing
    d) Sublimation
    Answer: b

  11. Transport of water in plants occurs through:
    a) Phloem
    b) Xylem
    c) Root
    d) Leaf
    Answer: b

  12. Which organ controls coordination?
    a) Cerebrum
    b) Cerebellum
    c) Medulla
    d) Spinal cord
    Answer: b

  13. Universal donor blood group:
    a) A
    b) B
    c) AB
    d) O
    Answer: d

  14. Vitamin for immunity:
    a) A
    b) B
    c) C
    d) D
    Answer: c

  15. Main digestive organ:
    a) Brain
    b) Heart
    c) Stomach
    d) Lung
    Answer: c

  16. Gas released during respiration:
    a) O2
    b) CO2
    c) N2
    d) H2
    Answer: b

  17. Largest ecosystem:
    a) Forest
    b) Desert
    c) Ocean
    d) Grassland
    Answer: c

  18. Main greenhouse gas:
    a) O2
    b) CO2
    c) N2
    d) H2
    Answer: b

  19. Renewable energy source:
    a) Coal
    b) Petrol
    c) Solar
    d) Diesel
    Answer: c

  20. Force acting on objects toward Earth:
    a) Magnetic
    b) Electric
    c) Gravitational
    d) Friction
    Answer: c

  21. SI unit of work:
    a) Watt
    b) Joule
    c) Volt
    d) Ampere
    Answer: b

  22. Energy due to position:
    a) Kinetic
    b) Potential
    c) Thermal
    d) Chemical
    Answer: b

  23. Who discovered nucleus?
    a) Thomson
    b) Rutherford
    c) Dalton
    d) Bohr
    Answer: b

  24. Particle with positive charge:
    a) Electron
    b) Proton
    c) Neutron
    d) Ion
    Answer: b

  25. Least reactive metal:
    a) Sodium
    b) Calcium
    c) Gold
    d) Iron
    Answer: c

  26. Gas used in photosynthesis:
    a) O2
    b) CO2
    c) N2
    d) H2
    Answer: b

  27. Part of eye forming image:
    a) Retina
    b) Iris
    c) Cornea
    d) Lens
    Answer: a

  28. Vitamin for vision:
    a) A
    b) B
    c) C
    d) D
    Answer: a

  29. Which disease caused by virus?
    a) TB
    b) Dengue
    c) Cholera
    d) Typhoid
    Answer: b

  30. Organ filtering blood:
    a) Liver
    b) Kidney
    c) Heart
    d) Lung
    Answer: b

  31. Cloud formation process:
    a) Evaporation
    b) Condensation
    c) Precipitation
    d) Sublimation
    Answer: b

  32. Gas supporting combustion:
    a) CO2
    b) O2
    c) N2
    d) H2
    Answer: b

  33. SI unit of resistance:
    a) Volt
    b) Ampere
    c) Ohm
    d) Watt
    Answer: c

  34. Device converting electrical to mechanical energy:
    a) Generator
    b) Motor
    c) Transformer
    d) Battery
    Answer: b

  35. Gas used in balloons:
    a) Oxygen
    b) Nitrogen
    c) Helium
    d) CO2
    Answer: c

  36. Closest planet to Sun:
    a) Venus
    b) Earth
    c) Mercury
    d) Mars
    Answer: c

  37. Largest planet:
    a) Earth
    b) Mars
    c) Jupiter
    d) Venus
    Answer: c

  38. Red planet:
    a) Earth
    b) Mars
    c) Venus
    d) Saturn
    Answer: b

  39. Most abundant gas in air:
    a) Oxygen
    b) Nitrogen
    c) CO2
    d) Hydrogen
    Answer: b

  40. Layer with weather changes:
    a) Troposphere
    b) Stratosphere
    c) Mesosphere
    d) Thermosphere
    Answer: a

  41. Instrument for humidity:
    a) Barometer
    b) Thermometer
    c) Hygrometer
    d) Anemometer
    Answer: c

  42. Biodegradable material:
    a) Plastic
    b) Glass
    c) Paper
    d) Metal
    Answer: c

  43. Gas used in fire extinguisher:
    a) O2
    b) CO2
    c) N2
    d) H2
    Answer: b

  44. Organ pumping blood:
    a) Brain
    b) Heart
    c) Kidney
    d) Lung
    Answer: b

  45. Process releasing energy:
    a) Photosynthesis
    b) Respiration
    c) Transpiration
    d) Digestion
    Answer: b

  46. Basic unit of life:
    a) Atom
    b) Cell
    c) Tissue
    d) Organ
    Answer: b

  47. Vitamin deficiency causing rickets:
    a) A
    b) B
    c) C
    d) D
    Answer: d

  48. Renewable energy example:
    a) Coal
    b) Petrol
    c) Solar
    d) Diesel
    Answer: c

  49. Organ removing waste:
    a) Kidney
    b) Heart
    c) Brain
    d) Lung
    Answer: a


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