For the TNUSRB Sub-Inspector (SI) exam, science is an important component of the General Knowledge section. Here are important science questions with answers divided by key topics:
1. Physics
Important Topics:
- Laws of motion
- Heat and light
- Electricity and magnetism
- Sound
- Units and measurements
Sample Questions with Answers:
- Question: What is the SI unit of force?
Answer: Newton (N) - Question: Which mirror is used in vehicle headlights?
Answer: Concave mirror - Question: What is the speed of light in a vacuum?
Answer: 3×108 m/s3 \times 10^8 \, \text{m/s} - Question: What type of wave is sound?
Answer: Longitudinal wave - Question: Name the instrument used to measure electric current.
Answer: Ammeter
2. Chemistry
Important Topics:
- Periodic table
- Acids, bases, and salts
- Metals and non-metals
- Chemical reactions
- Everyday chemistry (soaps, detergents, plastics, etc.)
Sample Questions with Answers:
- Question: What is the pH value of pure water?
Answer: 7 (neutral) - Question: Which gas is known as laughing gas?
Answer: Nitrous oxide (N₂O) - Question: What is the chemical formula of common salt?
Answer: NaCl - Question: Name the metal that is liquid at room temperature.
Answer: Mercury - Question: Which acid is found in lemons?
Answer: Citric acid
3. Biology
Important Topics:
- Human anatomy and physiology
- Diseases and prevention
- Nutrition and health
- Plant biology and photosynthesis
- Genetics and cell biology
Sample Questions with Answers:
- Question: Which organ purifies blood in the human body?
Answer: Kidneys - Question: What is the powerhouse of the cell?
Answer: Mitochondria - Question: Which vitamin is known as the “sunshine vitamin”?
Answer: Vitamin D - Question: What is the function of hemoglobin in the blood?
Answer: To transport oxygen - Question: Name a disease caused by a virus.
Answer: Influenza
4. Environmental Science
Important Topics:
- Pollution and its effects
- Renewable and non-renewable resources
- Conservation of biodiversity
- Climate change and global warming
Sample Questions with Answers:
- Question: What is the main gas responsible for global warming?
Answer: Carbon dioxide (CO₂) - Question: What is an ecosystem?
Answer: A community of living organisms interacting with their environment. - Question: Which energy source is renewable?
Answer: Solar energy - Question: Name the process by which plants release oxygen.
Answer: Photosynthesis - Question: What is the main cause of acid rain?
Answer: Sulfur dioxide (SO₂) and nitrogen oxides (NOₓ) in the atmosphere
5. General Science and Current Affairs
Important Topics:
- Latest scientific developments
- Space exploration
- Discoveries and inventions
Sample Questions with Answers:
- Question: Who is known as the father of modern physics?
Answer: Albert Einstein - Question: What is the full form of DNA?
Answer: Deoxyribonucleic Acid - Question: Name the first artificial satellite launched into space.
Answer: Sputnik 1 - Question: What is the Green Revolution associated with?
Answer: Agricultural productivity - Question: Which Indian satellite is used for weather forecasting?
Answer: INSAT series
Preparation Tips:
- Study NCERT Science Textbooks: Cover science from NCERT books of classes 6th to 10th.
- Solve Previous Year Papers: This will help in understanding the exam pattern and types of questions asked.
- Take Mock Tests: Online tests can help you improve time management.
- Revise Key Concepts Regularly: Focus on fundamental principles, formulas, and definitions.
