General Science MCQ questions in English, each with the correct answer and explanation (MCQ - 20) Gk
General Science MCQ questions: questions in English, each with the correct answer and explanation : MCQ By working through these Multiple Choice Questions (MCQs), General Science MCQ anyone wishing to improve their knowledge of scientific basics should find it helpful. You get an explanation along with each correct answer so you not only know the solution but also its reason. It helps students remember information for a long time and master the topics which is useful for anyone taking school exams, competitive tests such as the SSC, HSC, BCS, Railway, Bank, Medical or General Science MCQ questions Engineering entrance exams or general knowledge or civil service job interviews. General Science General Science MCQ questions.
General Knowledge – MCQ _ General Science MCQ questions
General Science MCQ questions
Q1. What part of the plant conducts photosynthesis?
- A) Root
- B) Stem
- C) Leaf
- D) Flower
Answer: C) Leaf
Explanation: Leaves contain chlorophyll which helps in photosynthesis.
Q2. Which gas do plants absorb during photosynthesis?
- A) Oxygen
- B) Carbon dioxide
- C) Nitrogen
- D) Hydrogen
Answer: B) Carbon dioxide
Explanation: Plants absorb CO₂ and release oxygen during photosynthesis.
Q3. What is the unit of electric current?
- A) Volt
- B) Ampere
- C) Watt
- D) Ohm
Answer: B) Ampere
Explanation: Ampere is the SI unit for measuring electric current.
Q4. Which part of the brain controls balance?
- A) Cerebrum
- B) Cerebellum
- C) Medulla
- D) Thalamus
Answer: B) Cerebellum
Explanation: The cerebellum maintains posture and coordination.
Q5. Which disease is caused by deficiency of Vitamin C?
- A) Rickets
- B) Night blindness
- C) Scurvy
- D) Beriberi
Answer: C) Scurvy
Explanation: Scurvy causes bleeding gums and is due to lack of Vitamin C.
Q6. Which blood group is known as the universal donor?
- A) A
- B) B
- C) AB
- D) O
Answer: D) O
Explanation: Blood group O– can donate to all other groups.
Q7. What is the boiling point of water in Fahrenheit?
- A) 100°F
- B) 180°F
- C) 212°F
- D) 230°F
Answer: C) 212°F
Explanation: Water boils at 212°F or 100°C at sea level.
Q8. What does DNA stand for?
- A) Deoxyribo Nucleic Acid
- B) Double Nucleus Acid
- C) Diatomic Nitrogen Acid
- D) None of the above
Answer: A) Deoxyribo Nucleic Acid
Explanation: DNA is the molecule carrying genetic information.
Q9. Which is the hardest natural substance?
- A) Gold
- B) Iron
- C) Diamond
- D) Quartz
Answer: C) Diamond
Explanation: Diamond ranks highest on the Mohs scale of hardness.
Q10. Which gas is known as "laughing gas"?
- A) Oxygen
- B) Nitrogen
- C) Nitrous oxide
- D) Carbon dioxide
Answer: C) Nitrous oxide
Explanation: N₂O is used in anesthesia and causes a laughing sensation.
Q11. Which planet is known as the “Red Planet”?
- A) Mercury
- B) Mars
- C) Venus
- D) Jupiter
Answer: B) Mars
Explanation: Mars appears red due to iron oxide on its surface.
Q12. Which human organ purifies blood?
- A) Heart
- B) Liver
- C) Kidney
- D) Lung
Answer: C) Kidney
Explanation: Kidneys filter waste from blood and form urine.
Q13. What is the primary source of energy for Earth?
- A) Moon
- B) Volcanoes
- C) Sun
- D) Lightning
Answer: C) Sun
Explanation: The Sun provides solar energy which drives most natural processes.
Q14. Which metal is used in thermometers?
- A) Lead
- B) Zinc
- C) Mercury
- D) Copper
Answer: C) Mercury
Explanation: Mercury expands with heat, making it ideal for temperature measurement.
Q15. Which part of the body contains the smallest bones?
- A) Hand
- B) Ear
- C) Nose
- D) Foot
Answer: B) Ear
Explanation: The ossicles in the middle ear are the smallest bones.
Q16. What is the chemical symbol of gold?
- A) Au
- B) Go
- C) Ag
- D) Gd
Answer: A) Au
Explanation: “Au” comes from the Latin word Aurum meaning gold.
Q17. Which vitamin helps in blood clotting?
- A) Vitamin A
- B) Vitamin D
- C) Vitamin K
- D) Vitamin C
Answer: C) Vitamin K
Explanation: Vitamin K is essential for coagulation.
Q18. What is Newton’s Third Law of Motion?
- A) F = ma
- B) For every action, there is an equal and opposite reaction
- C) Objects in motion stay in motion
- D) Energy cannot be created or destroyed
Answer: B) For every action, there is an equal and opposite reaction
Explanation: This is Newton’s 3rd law of motion.
Q19. What is the function of white blood cells?
- A) Oxygen transport
- B) Clotting
- C) Immunity
- D) Hormone transport
Answer: C) Immunity
Explanation: WBCs defend the body against infections.
Q20. Which layer protects the Earth from harmful UV rays?
- A) Stratosphere
- B) Ozone layer
- C) Troposphere
- D) Lithosphere
Answer: B) Ozone layer
Explanation: The ozone layer absorbs most of the Sun’s UV radiation.
General Science MCQ questions
General Science MCQ questions : Since these MCQs are easy to understand, you don’t need to be a native speaker. If you are a student looking for better marks in science, a teacher needing tests for your classes or an adult who wants to recall some old lessons, this helps you.
This collection becomes more significant because it includes explanations. The main reason many students don’t succeed in science is that they do not comprehend the concepts well and not because they have difficulty remembering facts. People who study the explanations are better prepared to use their knowledge in various fields and to answer questions on real exams.
The questions appear in groups and each set focuses on a range of topics to help you learn from all sides. You can employ these questions for learning alone, discussing with others, doing classroom tasks, trying online practice quizzes or testing yourself through exam simulations.
General Science MCQs with answers and explanations will help you to:
Brush up or sharpen what you know about science.
Face exams with certainty
Be familiar with important scientific ideas.
Try learning by doing something interactive and enjoyable.
General Science MCQ questions in English, each with the correct answer and explanation : By working through these Multiple Choice Questions (MCQs), anyone wishing to improve their knowledge of scientific basics should find it helpful. You get an explanation along with each correct answer so you not only know the solution but also its reason. It helps students remember information for a long time and master the topics which is useful for anyone taking school exams, competitive tests such as the SSC, HSC, BCS, Railway, Bank, Medical or Engineering entrance exams or general knowledge or civil service job interviews.
