Physical Sciences MCQs (Set 1)

6. Which type of reaction produces the most harmful radiation?

  • A. Fusion reaction
  • B. Chemical reaction
  • C. Fission reaction
  • D. Photo-chemical reaction
View Answer
Correct Answer:
C. Fission reaction

Explanation:
……

7. The velocity of sound is maximum in _____________.

  • A. Vacuum
  • B. Metal
  • C. Liquid
  • D. Air
View Answer
Correct Answer:
B. Metal

Explanation:
……

8. Which of the following is used for correcting myopic eyes?

  • A. Convex Lens
  • B. Concave Lens
  • C. Cylindrical Lens
  • D. None of these
View Answer
Correct Answer:
B. Concave Lens

Explanation:
……

9. A close bottle containing water at room temperature is taken to the Moon and then the lid is opened. The water will ___________.

  • A. Boil
  • B. Freeze
  • C. Decompose into Oxygen and Hydrogen
  • D. Not change at all
View Answer
Correct Answer:
A. Boil

Explanation:
……

10. Which one of the following waves are used in a night vision apparatus?

  • A. Infra-red waves
  • B. Radio waves
  • C. Microwaves
  • D. None of these
View Answer
Correct Answer:
A. Infra-red waves

Explanation:
……

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