General Science is tested in SSC MTS, CHSL, Railway Group D, NTPC, RPF, Delhi Police, and CTET. It covers basic Physics, Chemistry, and Biology up to Class 10 level. The questions are mostly factual and definition-based (not calculation-heavy), making this a high-scoring section with systematic preparation. Covering the full Class 8–10 NCERT textbooks once, combined with previous-year questions, is the most efficient strategy.

Key Topics Covered

Physics: Motion, Force, Work-Energy, Gravity, Sound, Light, Electricity, Magnetism, Heat
Chemistry: Atoms & Molecules, Chemical Reactions, Acids/Bases/Salts, Metals & Non-metals, Carbon compounds, Periodic Table basics
Biology: Cell biology, Tissues, Life processes (nutrition, respiration, excretion, reproduction), Heredity, Ecosystems
Disease & Health: Diseases (bacterial, viral, deficiency), Vitamins, Hormones, Blood groups
Science in everyday life: Fertilisers, Fuels, Polymers, Common chemicals
Space science basics: Planets, satellites, ISRO missions (for current affairs link)

Preparation Tips

Read Class 8, 9, and 10 NCERT Science books — nearly 80% of competitive exam General Science questions come directly from these.
Make formula/fact flashcards: SI units, scientists and their inventions, diseases and causative agents, vitamin deficiency diseases.
Biology weight is highest in most exams (40–50% of science questions) — focus on human body systems, diseases, and plant kingdom.
Chemistry: memorise the chemical names and formulas of 20 common compounds (baking soda = NaHCO₃, bleaching powder = CaOCl₂, etc.).
Physics in Railway/SSC: mostly conceptual — understand the principle, do not try to memorise derivations.
Link science topics to current affairs: ISRO launches, new drug approvals, health campaigns, etc. add bonus points.

Frequently Asked Questions

How many science questions are asked in Railway Group D?: RRB Group D CBT has 25 questions from General Science out of 100. The split is roughly: Physics 8–10, Chemistry 8–10, Biology/Life Science 8–10. All are Class 10 level.
Is Science asked in SSC CGL Tier-1?: Science is part of the General Awareness section in SSC CGL Tier-1. Out of 25 GK questions, roughly 4–6 come from Science (physics, chemistry, biology). For SSC MTS and CHSL there is a slightly higher science component.
Which Biology topics are most important for competitive exams?: Top Biology topics: Human digestive system, blood and circulatory system, nervous system, reproductive system, plant and animal cells, photosynthesis and respiration, heredity (Mendel), diseases and their causative organisms, and classification of living organisms.