Railway NTPC Science GK Questions — Most Repeated PYQs
Last updated: June 2026 · By GK Capsule Team
General Science is the highest-weightage GK topic in Railway NTPC and Group D. With 8–10 questions per paper in Group D and 5–7 in NTPC, mastering Science PYQs is the fastest way to improve your Railway exam score.
📊 Railway Science Weightage: NTPC: 5–7 questions · Group D: 8–10 questions · Biology dominates with 40–50% of science questions in Railway exams
Science in Daily Life — how common things work (refrigerator, electric bulb, battery)
Environment and Ecology — food chains, biodiversity, pollution
📝 Sample Railway Science PYQ Questions
Q1. Deficiency of which vitamin causes night blindness?
A) Vitamin BB) Vitamin CC) Vitamin AD) Vitamin K
✅ Answer: C) Vitamin A — Deficiency of Vitamin A (Retinol) causes night blindness (Nyctalopia) and in severe cases, complete blindness (Xerophthalmia).
Q2. Which metal is liquid at room temperature?
A) SodiumB) MercuryC) GalliumD) Both B and C
✅ Answer: D) Both B and C — Mercury is liquid at room temperature (melting point -39°C). Gallium is also liquid just above room temperature (melting point 29.76°C).
Q3. The loudness of sound is measured in which unit?
A) HertzB) DecibelC) WattD) Joule
✅ Answer: B) Decibel — The loudness (intensity) of sound is measured in Decibels (dB). Normal conversation is about 60 dB, while a jet engine is about 140 dB.
Practice 200+ Railway Science PYQs Free
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Railway NTPC CBT-1 has approximately 5–7 General Science questions out of 100. In RRB Group D, science questions are 18–20 out of 100. Science is the single most important GK topic for Railway exams.
Which science topics are most repeated in Railway NTPC?
Human biology (vitamins, diseases, body parts and functions) is most repeated. Then everyday chemistry (common acids, metals, reactions) and basic Physics (Newton's laws, SI units, optics). Vitamin deficiency diseases appear in almost every Railway exam.
How to prepare Science for Railway NTPC in 30 days?
Practice 20 Railway Science PYQs daily on GK Capsule. Make a master list of: vitamin sources and deficiency diseases, SI units, Newton's laws, acid/base examples, and common metal properties. Revise this list every 3 days.