
General Science MCQs in English with Answers and Explanations
General Science MCQs in English with Answers and Explanations : General Science Multiple-Choice Questions with Their Answers & Explanations
Everyone getting ready for government exams, testing for universities or colleges, taking competitive tests or participating in quiz contests need a good understanding of general science. Basic knowledge about the world comes from general science. It includes the basic ideas of Physics, Chemistry, Biology and Environmental Science which show how nature works.
General Science MCQs in English with Answers and Explanations
Q1. What happens to water at 100°C?
- A) Turns into ice
- B) Contracts
- C) Evaporates
- D) Freezes
Answer: C) Evaporates
Explanation: Water boils and becomes steam at 100°C.
Q2. What is the largest organ in the human body?
- A) Heart
- B) Skin
- C) Liver
- D) Lungs
Answer: B) Skin
Explanation: Skin is the largest external organ, protecting internal parts.
Q3. Which gas is most abundant in Earth's atmosphere?
- A) Oxygen
- B) Hydrogen
- C) Nitrogen
- D) Carbon dioxide
Answer: C) Nitrogen
Explanation: Nitrogen makes up about 78% of the Earth’s atmosphere.
Q4. Which blood cells carry oxygen?
- A) White blood cells
- B) Red blood cells
- C) Platelets
- D) Plasma
Answer: B) Red blood cells
Explanation: Hemoglobin in RBCs carries oxygen throughout the body.
Q5. What is the process of water vapor turning into liquid?
- A) Evaporation
- B) Condensation
- C) Freezing
- D) Sublimation
Answer: B) Condensation
Explanation: When vapor cools, it condenses back into liquid.
Q6. What is Earth's natural satellite?
- A) Mars
- B) Sun
- C) Neptune
- D) Moon
Answer: D) Moon
Explanation: The Moon is Earth’s only natural satellite.
Q7. Which vitamin is produced in the body by sunlight?
- A) Vitamin A
- B) Vitamin B
- C) Vitamin C
- D) Vitamin D
Answer: D) Vitamin D
Explanation: UV rays help synthesize Vitamin D in the skin.
Q8. Which is the lightest gas?
- A) Oxygen
- B) Carbon dioxide
- C) Nitrogen
- D) Hydrogen
Answer: D) Hydrogen
Explanation: Hydrogen is the lightest and most flammable gas.
Q9. How do plants make their food?
- A) Respiration
- B) Fermentation
- C) Photosynthesis
- D) Radiation
Answer: C) Photosynthesis
Explanation: Plants use sunlight, CO₂, and water to make food.
Q10. What principle does a reflecting telescope use?
- A) Refraction
- B) Diffraction
- C) Reflection
- D) Transmission
Answer: C) Reflection
Explanation: It uses mirrors to reflect light and form images.
Q11. Which organ has dual functions—digestive and endocrine?
- A) Liver
- B) Pancreas
- C) Kidney
- D) Heart
Answer: B) Pancreas
Explanation: It produces digestive enzymes and hormones like insulin.
Q12. Sound cannot travel through:
- A) Air
- B) Water
- C) Steel
- D) Vacuum
Answer: D) Vacuum
Explanation: Sound requires a medium; vacuum has none.
Q13. Which metal is a good conductor of electricity?
- A) Rubber
- B) Copper
- C) Glass
- D) Wood
Answer: B) Copper
Explanation: Copper allows easy flow of electric current.
Q14. Which metal is liquid at room temperature?
- A) Iron
- B) Mercury
- C) Lead
- D) Zinc
Answer: B) Mercury
Explanation: Mercury is the only liquid metal at room temp.
Q15. Who discovered blood circulation?
- A) Darwin
- B) Galileo
- C) William Harvey
- D) Mendel
Answer: C) William Harvey
Explanation: He proved that blood circulates through the body.
Q16. A magnet attracts which metal?
- A) Copper
- B) Gold
- C) Iron
- D) Aluminum
Answer: C) Iron
Explanation: Magnets attract only ferromagnetic materials like iron.
Q17. Where is DNA found in a cell?
- A) Cytoplasm
- B) Nucleus
- C) Membrane
- D) Ribosome
Answer: B) Nucleus
Explanation: DNA is stored in the cell’s nucleus.
Q18. Antibiotics are effective against:
- A) Viruses
- B) Bacteria
- C) Fungi
- D) Worms
Answer: B) Bacteria
Explanation: Antibiotics kill or stop bacterial growth, not viruses.
Q19. Which cells in the eye detect light and color?
- A) Red and white cells
- B) Rods and cones
- C) Neurons
- D) Platelets
Answer: B) Rods and cones
Explanation: Rods detect light; cones detect colors.
Q20. What mineral is essential for strong bones and teeth?
- A) Sodium
- B) Calcium
- C) Iron
- D) Potassium
Answer: B) Calcium
Explanation: Calcium helps build and maintain bones and teeth.
GK Questions
Students, teachers and job seekers can rely on General Science Multiple Choice Questions (MCQs) since it offers reliable practice questions. Preparing for any exam, be it SSC, UPSC, BCS, WBCS, Railways, Bank or similar, including general knowledge questions, practicing MCQs is one of the best ways to develop your knowledge and skills in answering questions.
All the questions are chosen to match the style and degree of difficulty of typical exam questions. Correct answers and brief explanations are given next to each question, making sure learners remember the answers as well as learn the main idea behind them. Such an approach supports students’ learning and gives them strong skills in thinking and reasoning which are valued in society and at work.
Not only is general science about learning details, but it is also about exploring why things function the way they do. How come water is able to support floating ice? Why do the seasons go from one to another? What is the way that antibiotics attack and overcome infections? What causes us to see rainbows? All these questions depend on applying scientific principles. When students face MCQs that ask these questions, they slowly start thinking about concepts in an interested manner.
MCQs also save time when learning. With it, students can review easily, find out what they struggle with and improve without feeling stuck by difficult theories. Because many competitive exams are multiple-choice, using this study format is quite realistic and reflects the actual exam.
Questions in this set deal with a wide range of science subjects, both basic (like those found in biology, chemistry and physics) and more about the environment. Because it covers a lot, learners of any background or age are able to learn general science in a well-rounded way.
Practicing science skills regularly will help you perform well in class or competitions and also allow you to answer questions about science more confidently in real life.







Pingback: Amazing GK Knowledge of the Declaration of Independence 2026