General Science25 mins read

100 High-Yield General Science Concepts

Exam Target: RRB Sub Inspector (RRB SI)

High-yield general science points spanning Physics, Chemistry, and Biology to boost your score in Railway and SSC tier-1 exams.

RRB Sub Inspector (RRB SI) follows a 100 Q | 90 Min | CBT pattern, with General Science as one of its scored sections alongside Arithmetic, Reasoning. The reference notes below apply directly to the General Science portion of RRB SI's syllabus.

1. Physics: Mechanics and Light

• Newton's Laws: 1st Law (Inertia), 2nd Law (F = ma), 3rd Law (Action & Reaction). • SI Units: Force (Newton), Work/Energy (Joules), Power (Watt), Pressure (Pascal), Frequency (Hertz). • Mirrors: Concave mirror is used by dentists and in headlights (converging). Convex mirror is used as a rear-view mirror in vehicles (diverging, wide field of view).

2. Chemistry: Chemical Names and Ores

• Baking Soda: Sodium Bicarbonate (NaHCO3) • Washing Soda: Sodium Carbonate (Na2CO3.10H2O) • Bleaching Powder: Calcium Hypochlorite (Ca(OCl)2) • Plaster of Paris: Calcium Sulfate Hemihydrate (CaSO4.1/2H2O) • Important Ores: Bauxite (Ore of Aluminum), Haematite (Ore of Iron), Cinnabar (Ore of Mercury).

3. Biology: Human Anatomy and Vitamins

• Blood: Connective tissue, pH is approximately 7.4. RBC lifespan is 120 days. WBC is the immune system protection. • Vitamins Deficiency: Vitamin A (Night blindness), Vitamin B1 (Beriberi), Vitamin C (Scurvy), Vitamin D (Rickets), Vitamin K (Delayed blood clotting). • Glands: Liver is the largest gland. Pancreas is a mixed gland (both endocrine and exocrine).

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