22500+ Important MCQs for NDA

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22500+ MCQs for NDA are available here. You can learn these questions for your better preparation. Questions are available with its correct answer. You can check the correct answer of any questions by clicking the option or show answer button.
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📊 Physics
Q. Which among the following is the fundamental quantity ?
  • (A) Volume
  • (B) Time
  • (C) Velocity
  • (D) Force
💬 Discuss
✅ Correct Answer: (B) Time
📊 Physics
Q. A bucket of water is hung from a spring balance. A piece of iron is suspended in the water without touching the sides or touching the bottom of the bucket. The reading of the spring balance
  • (A) Will increase
  • (B) Will decrease
  • (C) Does not change
  • (D) Varies with the increase of depth of the immersion of the iron piece
💬 Discuss
✅ Correct Answer: (A) Will increase
📊 Physics
Q. 1 amu is equivalent to
  • (A) 1 eV
  • (B) 931 eV
  • (C) 931 KeV
  • (D) 931 MeV
💬 Discuss
✅ Correct Answer: (D) 931 MeV
📊 Physics
Q. The time period of a seconds pendulum is
  • (A) 1 second
  • (B) 2 seconds
  • (C) 0.5 second
  • (D) 1.5 second
💬 Discuss
✅ Correct Answer: (B) 2 seconds
📊 Physics
Q. One billionth of a second is called
  • (A) Microsecond
  • (B) Picoseconds
  • (C) Millisecond
  • (D) Nanosecond
💬 Discuss
✅ Correct Answer: (D) Nanosecond
📊 Physics
Q. If the length of a simple pendulum is halved then its period of oscillation is
  • (A) Doubled
  • (B) Halved
  • (C) Increased by a factor 2
  • (D) Decreased by a factor 2
💬 Discuss
✅ Correct Answer: (D) Decreased by a factor 2
📊 Chemistry
Q. Polythene is polymer of
  • (A) Ethylene
  • (B) Propylene
  • (C) Acetylene
  • (D) Aniline
💬 Discuss
✅ Correct Answer: (A) Ethylene
📊 Chemistry
Q. Silk fibre chemically is :
  • (A) Carbohydrate
  • (B) Fat
  • (C) Protein
  • (D) Cellulose
💬 Discuss
✅ Correct Answer: (C) Protein
📊 Chemistry
Q. What is the chemical symbol of mercury?
  • (A) Mr
  • (B) Mg
  • (C) Hg
  • (D) None of the above
💬 Discuss
✅ Correct Answer: (C) Hg
📊 Chemistry
Q. The purest form of water in nature is
  • (A) Rain water
  • (B) Lake water
  • (C) River water
  • (D) Sea water
💬 Discuss
✅ Correct Answer: (A) Rain water

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