If you’re preparing for the RRB NTPC 2025 exam, mastering General Science and Physics is crucial for scoring high in the CBT Stage 1 exam. To help boost your preparation, here is a specially curated set of multiple-choice questions (MCQs) based on key science concepts, frequently asked in previous railway exams.
These questions cover Physics, Chemistry, Biology, and Environmental Science topics that are highly relevant to the RRB NTPC syllabus. The correct answers are also provided for quick revision and self-assessment.
RRB NTPC 2025 Exam: Important General Science & Physics MCQs
Here are the MCQs:
1. Which animal is called a “living fossil”?
- a) Peripatus
- b) Amoeba
- c) Cockroach
- d) Apple Snail
2. Which of the following is present in the Himalayan refrigerator?
- a) Carbon Dioxide
- b) Methane
- c) Helium
- d) Chlorofluorocarbon
3. Which radioactive element is used in a heart pacemaker?
- a) Uranium
- b) Dyterium
- c) Plutonium
- d) Radium
4. Solar cookers work based on which principle?
- a) Bolometer
- b) Pyrometer
- c) Prism
- d) Solar reflecting cone
5. If the diameter of a heater coil is reduced by 10%, then the efficiency of the heater—
- a) Increases by approx. 9%
- b) Increases by approx. 11%
- c) Increases by approx. 19%
- d) Increases by approx. 10%
6. During onion cutting, eyes water due to the presence of which chemical?
- a) Sulfur
- b) Chlorine
- c) Bromine
- d) Nitrogen
7. If a heavy object and a light object are released simultaneously from the same height—
- a) The heavier object will fall faster
- b) The lighter object will fall faster
- c) Both will fall at the same rate
- d) Both will fall with the same force
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8. Which of the following is not a unit of distance?
- a) Angstrom
- b) Parsec
- c) Furlong
- d) Joule
9. Dilatometer is used to measure—
- a) Nuclear power
- b) Magnetic power
- c) Change in material volume
- d) Thermal power
10. For an ideal gas, the ratio of RMS velocity to most probable velocity is—
- a) √3 : 1
- b) 1 : √3
- c) √3 : √2
- d) √2 : √3
11. A lens has a power of +2.0D. The focal length and nature of the lens is—
- a) 50 cm, Concave
- b) 50 cm, Convex
- c) 100 cm, Convex
- d) 100 cm, Concave
12. The reason for the color seen in a compact disc (CD) is—
- a) Refraction
- b) Reflection
- c) Interference
- d) Diffraction
13. As per WHO, the virus responsible for Covid-19 is—
- a) SARS-CoV-2
- b) Covid-19
- c) nCovid-19
- d) Corona Virus
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14. A battery has 10 cells each of 1V. If 2 cells are connected in reverse, the output voltage will be—
- a) 8V
- b) 10V
- c) 6V
- d) 12V
15. The principle behind hydraulic press is—
- a) Archimedes’ principle
- b) Pascal’s law
- c) Reynold’s law
- d) Bernoulli’s principle
16. When a balloon is punctured, the air rushes out due to—
- a) Increase in pressure
- b) Constant pressure
- c) Decrease in pressure
- d) Zero pressure
17. Deep freezer temperature is—
- a) –23°C
- b) 4°C
- c) Solid SO₂
- d) Solid CO₂
18. The reason behind placing freezer tray at the top of a refrigerator is—
- a) Easy to use
- b) Helps in pricing
- c) Helps cool lower compartments via convection
- d) Better design
19. A boat moving on water is influenced by—
- a) Thrust
- b) Drag
- c) Both thrust and drag
- d) Friction
20. Alloys used for making bell metal are—
- a) Fe and Cu
- b) Fe and Zn
- c) Sn and Cu
- d) Sn and Pb
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Answers to the RRB NTPC 2025 Exam: Important General Science & Physics MCQs
Here are the answers to the MCQs:
- a) Peripatus
- d) Chlorofluorocarbon
- d) Radium
- d) Solar reflecting cone
- c) Increases by approx. 19%
- a) Sulfur
- c) Both will fall at the same rate
- d) Joule
- c) Change in material volume
- a) √3 : 1
- b) 50 cm, Convex
- d) Diffraction
- a) SARS-CoV-2
- a) 8V
- b) Pascal’s law
- a) Increase in pressure
- a) –23°C
- c) Helps cool lower compartments via convection
- c) Both thrust and drag
- c) Sn and Cu
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