Everyday Science MCQs with Answers
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- 1 Hrs
Prepare important and challenging Everyday Science MCQs designed for scholarships, job interview tests, and competitive exams. These cover Physics, Chemistry, Biology, Astronomy, Inventions, Human Body, and Scientific Discoveries. Strengthen your knowledge of science in daily life and get ready to succeed in exams.
Q1. The planet known as the “Red Planet” is:
(A) Venus
(B) Mars
(C) Jupiter
(D) Saturn
Answer (B) Mars
Q2. The gas used in the preparation of fizzy soft drinks is:
(A) Nitrogen
(B) Carbon dioxide
(C) Oxygen
(D) Hydrogen
Answer (B) Carbon dioxide
Q3. Who invented the telephone?
(A) Alexander Graham Bell
(B) Thomas Edison
(C) Marconi
(D) James Watt
Answer (A) Alexander Graham Bell
Q4. The hardest natural substance on Earth is:
(A) Gold
(B) Iron
(C) Diamond
(D) Quartz
Answer (C) Diamond
Q5. The part of the human brain responsible for memory is:
(A) Cerebellum
(B) Cerebrum
(C) Medulla
(D) Pons
Answer (B) Cerebrum
Q6. Which vitamin is produced in the skin with the help of sunlight?
(A) Vitamin A
(B) Vitamin B12
(C) Vitamin C
(D) Vitamin D
Answer (D) Vitamin D
Q7. The device used to measure atmospheric pressure is:
(A) Hygrometer
(B) Barometer
(C) Thermometer
(D) Altimeter
Answer (B) Barometer
Q8. The chemical symbol of Sodium is:
(A) So
(B) Na
(C) Sn
(D) S
Answer (B) Na
Q9. Which blood group is known as the universal donor?
(A) A
(B) B
(C) AB
(D) O
Answer (D) O
Q10. Who proposed the Theory of Relativity?
(A) Newton
(B) Einstein
(C) Galileo
(D) Kepler
Answer (B) Einstein
Q11. The fastest planet to revolve around the sun is:
(A) Mercury
(B) Venus
(C) Earth
(D) Mars
Answer (A) Mercury
Q12. The main constituent of natural gas is:
(A) Ethane
(B) Methane
(C) Propane
(D) Butane
Answer (B) Methane
Q13. Which organ purifies blood in the human body?
(A) Heart
(B) Kidneys
(C) Liver
(D) Lungs
Answer (B) Kidneys
Q14. The most abundant gas in Earth’s atmosphere is:
(A) Oxygen
(B) Nitrogen
(C) Carbon dioxide
(D) Argon
Answer (B) Nitrogen
Q15. Which is the smallest unit of matter?
(A) Molecule
(B) Atom
(C) Proton
(D) Neutron
Answer (B) Atom
Q16. The scientist who discovered penicillin was:
(A) Louis Pasteur
(B) Alexander Fleming
(C) Edward Jenner
(D) Watson
Answer (B) Alexander Fleming
Q17. The speed of light is approximately:
(A) 3 × 10⁵ km/s
(B) 3 × 10⁸ m/s
(C) 1 × 10⁶ m/s
(D) 5 × 10⁷ m/s
Answer (B) 3 × 10⁸ m/s
Q18. The part of the cell that controls activities is:
(A) Mitochondria
(B) Nucleus
(C) Ribosome
(D) Cytoplasm
Answer (B) Nucleus
Q19. Which is the largest gland in the human body?
(A) Pancreas
(B) Liver
(C) Thyroid
(D) Kidney
Answer (B) Liver
Q20. The first man to travel into space was:
(A) Neil Armstrong
(B) Yuri Gagarin
(C) Buzz Aldrin
(D) Alan Shepard
Answer (B) Yuri Gagarin
Q21. Which vitamin is necessary for blood clotting?
(A) Vitamin A
(B) Vitamin D
(C) Vitamin K
(D) Vitamin C
Answer (C) Vitamin K
Q22. The branch of science dealing with earthquakes is:
(A) Meteorology
(B) Seismology
(C) Geology
(D) Volcanology
Answer (B) Seismology
Q23. The first successful heart transplant was performed in:
(A) 1957
(B) 1967
(C) 1977
(D) 1987
Answer (B) 1967
Q24. Which of the following is NOT a greenhouse gas?
(A) CO₂
(B) CH₄
(C) N₂
(D) O₃
Answer (C) N₂
Q25. The SI unit of force is:
(A) Joule
(B) Watt
(C) Newton
(D) Pascal
Answer (C) Newton
Q26. Which acid is present in lemon?
(A) Acetic acid
(B) Citric acid
(C) Formic acid
(D) Oxalic acid
Answer (B) Citric acid
Q27. The device used to measure humidity is:
(A) Hygrometer
(B) Thermometer
(C) Galvanometer
(D) Anemometer
Answer (A) Hygrometer
Q28. The green pigment in plants is:
(A) Chlorophyll
(B) Carotene
(C) Xanthophyll
(D) Hemoglobin
Answer (A) Chlorophyll
Q29. The normal temperature of the human body in Celsius is:
(A) 36°C
(B) 37°C
(C) 38°C
(D) 39°C
Answer (B) 37°C
Q30. Which gas is responsible for acid rain?
(A) Nitrogen
(B) Sulphur dioxide
(C) Oxygen
(D) Helium
Answer (B) Sulphur dioxide
Q31. The largest planet in the solar system is:
(A) Earth
(B) Saturn
(C) Jupiter
(D) Uranus
Answer (C) Jupiter
Q32. Photosynthesis in plants requires:
(A) Water, Oxygen, Sunlight
(B) Water, CO₂, Sunlight
(C) Oxygen, CO₂, Water
(D) Oxygen, Nitrogen, Water
Answer (B) Water, CO₂, Sunlight
Q33. The unit of electric current is:
(A) Ampere
(B) Volt
(C) Watt
(D) Ohm
Answer (A) Ampere
Q34. Which is known as the powerhouse of the cell?
(A) Nucleus
(B) Ribosome
(C) Mitochondria
(D) Chloroplast
Answer (C) Mitochondria
Q35. The smallest bone in the human body is:
(A) Femur
(B) Stapes
(C) Tibia
(D) Ulna
Answer (B) Stapes
Q36. The study of heredity and genes is called:
(B) Genetics
(C) Cytology
(D) Botany
Answer (B) Genetics
Q37. The gas essential for respiration is:
(A) Nitrogen
(B) Oxygen
(C) Carbon dioxide
(D) Hydrogen
Answer (B) Oxygen
Q38. The inventor of the light bulb was:
(A) Newton
(B) Edison
(C) Franklin
(D) Tesla
Answer (B) Edison
Q39. Which planet has the largest number of moons?
(A) Jupiter
(B) Saturn
(C) Uranus
(D) Neptune
Answer (B) Saturn
Q40. Which vitamin prevents night blindness?
(B) Vitamin B
(C) Vitamin C
(D) Vitamin D
Answer (A) Vitamin A
Q41. Who is known as the father of modern chemistry?
(A) Lavoisier
(B) Dalton
(C) Mendeleev
(D) Boyle
Answer (A) Lavoisier
Q42. The chemical formula of water is:
(A) H₂
(B) H₂O
(C) O₂
(D) CO₂
Answer (B) H₂O
Q43. Which organ produces insulin?
(A) Stomach
(B) Liver
(C) Pancreas
(D) Kidney
Answer (C) Pancreas
Q44. Which planet is called the "Morning Star"?
(A) Venus
(B) Mars
(C) Saturn
(D) Neptune
Answer (A) Venus
Q45. The normal pH of human blood is about:
(A) 6.8
(B) 7.0
(C) 7.4
(D) 8.0
Answer (C) 7.4
Q46. The device that converts chemical energy into electrical energy is:
(A) Generator
(B) Battery
(C) Transformer
(D) Motor
Answer (B) Battery
Q47. The first person to propose the heliocentric model of the universe was:
(A) Galileo
(B) Copernicus
(C) Kepler
(D) Ptolemy
Answer (B) Copernicus
Q48. The boiling point of water on Celsius scale is:
(A) 90°C
(B) 95°C
(C) 100°C
(D) 110°C
Answer (C) 100°C
Q49. Which element is essential for the formation of hemoglobin?
(B) Iron
(C) Potassium
(D) Magnesium
Answer (B) Iron
Q50. The first Nobel Prize in Physics was awarded to:
(A) Einstein
(B) Roentgen
(C) Planck
(D) Rutherford
Answer (B) Roentgen
