RRB Group D General Science Topic Tests, Attempt Free Tests

Railway Recruitment Board (RRB) is conducting the RRB Group D CBT 1 exam from November 17th to December 31st, 2025. As you can see, time is short. At this point in time, you should utilize this time smartly. Maybe most of you have not prepared the general science effectively due to its vast syllabus, but you still have to prepare this section effectively in a very short time. For that, we have provided free RRB Group D General Science Topic Tests. Let’s make sure those 25 marks are yours!

Most Scoring Topics in RRB Group D General Science

This time is very important, and you should focus on your revision as much as you can. Forget trying to read a new chapter or topic. RRB keeps the General Science section focused on Class 10th-level concepts, heavily drawn from Physics, Chemistry, and Biology. Below, we have mentioned the general science topics, and along with that, we have provided the free tests.

1. Biology / Life Sciences

Why It’s Important: Biology questions frequently test direct facts, terminology, and the working of the human body, which is highly relatable and scoreable.

Key Focus Areas:

• Human Body & Organ Systems: You must know the basics of the Digestive, Circulatory, Nervous, and Respiratory systems. What does the enzyme do? Which organ filters what? Know the facts!
• Diseases & Immunity: Common diseases, their causes (virus/bacteria), and basic prevention (like vaccines).
• Ecology & Environment: Concepts like Food Chains, Food Webs, Pollution, and Natural Resources. The syllabus is vast, so we advise you to cover environmental impact questions also.
• Cell & Genetics: Basic cell structure, DNA, and simple concepts of heredity.

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2. Physics

Physics brings you concepts that often involve simple, direct numerical applications—making them quick to solve if you know the formula.

Why It’s Important: Physics questions often test definitions but also include simple numerical problems where speed wins.

Key Focus Areas:

• Force, Motion, & Laws: Newton’s three laws are non-negotiable. Understand concepts like velocity, acceleration, inertia, and momentum.
• Electricity & Magnetism: This is a massive scoring area. Focus on Ohm’s Law ($V=IR$), resistance (series/parallel combination), current, power, and the basics of AC/DC generation.
• Light & Optics: Reflection, Refraction, the use of Lenses and Mirrors, and concepts like the power of a lens.
• Units & Measurements: Knowing standard units (SI units) and simple conversions is essential.

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3. Chemistry

Chemistry is often about knowing the properties, names, and reactions of common substances—it’s heavy on memorization, but the questions are usually direct.

Why It’s Important: A large chunk of Chemistry revolves around common, everyday chemicals and basic periodic table facts.

Key Focus Areas:

• Acids, Bases, & Salts: Know the basic properties, how to identify them, and the pH scale. Neutralization reactions are gold.
• Metals & Non-Metals: Physical and chemical properties, uses in industry (like rust/corrosion), and reactivity.
• Chemical Reactions: Basics of types of reactions like Oxidation/Reduction and Combustion (what is fuel?).
• Periodic Table: Just the basics—groups, periods, and general trends. Don’t get lost in advanced concepts!

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RRB Group D General Science Formulas

Here, we have provided a list of the most important 100 formulas for the general science section. You are strongly advised ot prepare these formulas. This will boost your learning process and will help when you attempt RRB Group D general science topic tests.

PHYSICS FORMULAS

Motion & Speed

1. Speed = Distance / Time
2. Velocity = Displacement / Time
3. Acceleration = (Final Velocity – Initial Velocity) / Time
4. Distance (Uniform Acceleration) = ut + (1/2)at²
5. Final Velocity² = u² + 2as
6. Average Speed = (u + v) / 2
7. Retardation = (v – u) / t (when speed decreases)
8. Relative Speed (same direction) = (A – B)
9. Relative Speed (opposite direction) = (A + B)
10. 1 km/hr = 5/18 m/s; 1 m/s = 18/5 km/hr

Force, Work & Energy

11. Force (F) = Mass × Acceleration (F = ma)
12. Work = Force × Displacement
13. Power = Work / Time
14. Energy = Capacity to do Work
15. Kinetic Energy (KE) = ½ mv²
16. Potential Energy (PE) = mgh
17. Work-Energy Theorem → Work = ΔK.E.
18. Law of Conservation of Energy → Energy can neither be created nor destroyed

Pressure, Density & Fluids

19. Pressure = Force / Area
20. Density = Mass / Volume
21. Relative Density = Density of Substance / Density of Water
22. Pascal’s Law: Pressure applied on fluid is transmitted equally
23. Archimedes’ Principle: Loss in weight = Weight of displaced fluid
24. Buoyant Force = Weight of displaced liquid

Heat & Temperature

25. Heat (Q) = m × c × ΔT
26. Celsius to Kelvin = °C + 273
27. Heat gained = Heat lost (in thermal equilibrium)
28. Specific Heat = Heat / (Mass × Temperature change)
29. Latent Heat = Heat / Mass
30. Heat Transfer Methods: Conduction, Convection, Radiation

Light & Optics

31. Speed of Light in Air = 3 × 10⁸ m/s
32. Refractive Index = Speed of Light in Vacuum / Speed in Medium
33. Mirror Formula: 1/f = 1/v + 1/u
34. Lens Formula: 1/f = 1/v – 1/u
35. Magnification (m) = Height of Image / Height of Object = v/u
36. Power of Lens (D) = 1 / Focal Length (in meters)

Sound

37. Speed = Distance / Time
38. Frequency (f) = 1 / Time Period (T)
39. Wavelength (λ) = Speed / Frequency
40. Echo Time = 2 × Distance / Speed of Sound
41. Speed of Sound in Air = 343 m/s (approx.)
42. Audible Frequency Range: 20 Hz – 20,000 Hz

Electricity & Magnetism

43. Ohm’s Law: V = IR
44. Resistance (R) = ρ × L / A
45. Power = VI = I²R = V² / R

CHEMISTRY FORMULAS & CONCEPTS

Atoms & Molecules

46. Atomic Number = Number of Protons
47. Mass Number = Protons + Neutrons
48. Number of Neutrons = Mass Number – Atomic Number
49. 1 Mole = 6.022 × 10²³ particles (Avogadro’s Number)
50. Molar Mass = Mass of 1 Mole of Substance
51. Molecular Weight = Sum of Atomic Weights of Elements

Chemical Reactions

52. Law of Conservation of Mass → Mass of Reactants = Mass of Products
53. Types of Reactions: Combination, Decomposition, Displacement, Double Displacement
54. Rate of Reaction ∝ Concentration of Reactants
55. Oxidation = Gain of Oxygen / Loss of Electrons
56. Reduction = Gain of Electrons / Loss of Oxygen

Acids, Bases & Salts

57. pH = –log[H⁺]
58. pH < 7 → Acidic, pH = 7 → Neutral, pH > 7 → Basic
59. Neutralization: Acid + Base → Salt + Water
60. Strength of Acid ∝ H⁺ Ion Concentration
61. Common Acids: HCl, H₂SO₄, HNO₃
62. Common Bases: NaOH, KOH, Ca(OH)₂
63. Baking Soda → NaHCO₃
64. Washing Soda → Na₂CO₃·10H₂O
65. Plaster of Paris → 2CaSO₄·H₂O

Metals & Non-Metals

66. Rusting: Fe + O₂ + H₂O → Fe₂O₃·xH₂O
67. Alloys = Mixture of Metals (e.g., Brass = Cu + Zn)
68. Metals conduct electricity; Non-Metals generally do not
69. Metal Oxides → Basic; Non-Metal Oxides → Acidic
70. Reactivity Series: K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Ag > Au

Carbon & Compounds

71. Methane → CH₄
72. Ethane → C₂H₆
73. Ethanol → C₂H₅OH
74. Ethanoic Acid (Acetic Acid) → CH₃COOH
75. Law of Constant Proportion → Chemical compounds always contain same elements in same proportion by mass

BIOLOGY FACTS & FORMULAS

Cell & Life Processes

76. Cell = Basic unit of life
77. Plant Cell has Cell Wall; Animal Cell does not
78. Mitochondria = Powerhouse of the Cell
79. Ribosomes = Protein Synthesis
80. Photosynthesis: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
81. Respiration: Glucose + O₂ → CO₂ + H₂O + Energy
82. Enzymes → Biological Catalysts
83. Diffusion = Movement of particles from high to low concentration
84. Osmosis = Movement of water through semipermeable membrane

Human Body

85. Normal Body Temperature = 37°C (98.6°F)
86. Human Heart Chambers = 4 (2 Atria, 2 Ventricles)
87. Blood pH ≈ 7.4
88. RBC → Transport Oxygen; WBC → Fight Infection; Platelets → Blood Clotting
89. Respiration Organs → Nose, Trachea, Lungs
90. Digestion Organs → Mouth → Stomach → Small Intestine → Large Intestine
91. Excretory Organ → Kidney (produces urine)
92. Brain Parts: Cerebrum (Intelligence), Cerebellum (Balance), Medulla (Breathing)
93. Human Blood Groups → A, B, AB, O

Plant Life

94. Photosynthesis occurs in Chloroplast (contains Chlorophyll)
95. Transpiration → Loss of water through leaves
96. Germination → Growth of a seed into a plant
97. Pollination → Transfer of pollen from anther to stigma
98. Fertilization → Fusion of male and female gametes

Health, Disease & Vitamins

99. Communicable Diseases → Caused by Pathogens (e.g., TB, Measles, Malaria)
100. Vitamin Deficiencies:

• A → Night Blindness
• B1 → Beriberi
• C → Scurvy
• D → Rickets
• K → Poor Blood Clotting
• B12 → Pernicious Anemia

How Top Scorers Master General Science?

General Science isn’t just about knowing the answer; it’s about recalling the correct fact instantly under time pressure. After you wrap up one of our free topic tests, focus your analysis on these three checks:

1. The Fact Recall Check (The Terminology Gap): Most candidates get confused with terminology, due to which they fail to answer the questions even though they knew it. For example, did you mix up “Ecology” with “Environment”? Or confuse the function of the small intestine with the large intestine? If you lost marks here, your revision needs to focus on flashcards and definition drills. Stop just reading them, start recalling them.
2. The Formula/Concept Check (Physics Numerical Trap): If you missed a Physics question, was it a conceptual slip (e.g., mixing up reflection and refraction) or a calculation error because you forgot the formula for power? Know your basic physics formulas inside out.
3. The Real-Life Link Check (Application Test): Did you get the question wrong about why rainbows form or how a simple electric bulb works? RRB mostly asks questions about everyday science. You can test your knowledge on these questions by taking our free mock tests.

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