50 General Science Questions
Explore 50 important general science questions with answers to boost your knowledge for competitive exams. Perfect for SSC, UPSC, railway, and school-level quizzes. Enhance your science GK quickly with these concise and informative questions.
1. What is the basic unit of life?
A) Atom
B) Cell
C) Tissue
D) Organ
Answer:- B) Cell.
2. Which force pulls objects toward the Earth?
A) Magnetism
B) Electricity
C) Gravity
D) Friction
Answer:- C) Gravity.
3. Which gas turns lime water milky?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Answer:- B) Carbon dioxide.
4. The chemical formula of methane is:
A) CH3
B) CH4
C) C2H6
D) C2H2
Answer:- B) CH4.
5. Which body system includes bones and joints?
A) Circulatory
B) Respiratory
C) Skeletal
D) Digestive
Answer:- C) Skeletal.
6. Which disease is caused by a deficiency of vitamin C?
A) Rickets
B) Scurvy
C) Pellagra
D) Night blindness
Answer:- B) Scurvy.
7. Which instrument is used to measure air pressure?
A) Thermometer
B) Barometer
C) Hygrometer
D) Altimeter
Answer:- B) Barometer.
8. Which gas is known as laughing gas?
A) Nitrogen
B) Nitrogen dioxide
C) Nitrous oxide
D) Carbon monoxide
Answer:- C) Nitrous oxide
9. The ozone layer protects us from:
A) Radio waves
B) Infrared rays
C) Ultraviolet rays
D) Visible light
Answer:- C) Ultraviolet rays.
10. Which part of the brain controls breathing and heartbeat?
A) Cerebrum
B) Cerebellum
C) Medulla
D) Hypothalamus
Answer:- C) Medulla.
11. Which part of the cell contains the genetic material?
A) Nucleus
B) Mitochondria
C) Cytoplasm
D) Ribosome
Answer:- A) Nucleus.
12. The process of liquid changing into gas is called:
A) Condensation
B) Evaporation
C) Melting
D) Freezing
Answer:- B) Evaporation.
13. How many teeth does an adult human have?
A) 28
B) 30
C) 32
D) 34
Answer:- C) 32.
14. Which component of blood gives it its red color?
A) Hemoglobin
B) Plasma
C) White cells
D) Platelets
Answer:- A) Hemoglobin.
15. The unit of frequency is:
A) Hertz
B) Newton
C) Watt
D) Ohm
Answer:- A) Hertz.
16. Which vitamin helps in blood clotting?
A) Vitamin A
B) Vitamin B
C) Vitamin C
D) Vitamin K
Answer:- D) Vitamin K.
17. The filament of an electric bulb is made of:
A) Copper
B) Iron
C) Tungsten
D) Nickel
Answer:- C) Tungsten.
18. Sound cannot travel through:
A) Solid
B) Liquid
C) Gas
D) Vacuum
Answer:- D) Vacuum.
19. Which of the following is a greenhouse gas?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Answer:- B) Carbon dioxide.
20. Which blood group is known as the universal recipient?
A) A
B) B
C) AB
D) O
Answer:- C) AB.
50 General Science for Competitive Examinations
21. The process of breaking down food is called:
A) Digestion
B) Absorption
C) Respiration
D) Reproduction
Answer:- A) Digestion.
22. Which of these is a conductor of electricity?
A) Plastic
B) Wood
C) Copper
D) Rubber
Answer:- C) Copper.
23. Which acid is present in vinegar?
A) Formic acid
B) Acetic acid
C) Citric acid
D) Lactic acid
Answer:- B) Acetic acid.
24. Which part of the plant becomes a fruit?
A) Root
B) Leaf
C) Stem
D) Ovary
Answer:- D) Ovary.
25. Which disease affects the liver?
A) Malaria
B) Hepatitis
C) Tuberculosis
D) Diabetes
Answer:- B) Hepatitis.
26. Which one is a non-metal?
A) Zinc
B) Iron
C) Sulfur
D) Copper
Answer:- C) Sulfur.
27. Which blood cells carry oxygen?
A) Red blood cells
B) White blood cells
C) Platelets
D) Plasma
Answer:- A) Red blood cells.
28. Which organ helps in excretion?
A) Lungs
B) Kidney
C) Heart
D) Brain
Answer:- B) Kidney.
29. Which planet is known as the blue planet?
A) Mars
B) Earth
C) Venus
D) Uranus
Answer:- B) Earth.
30. What is the largest organ in the human body?
A) Liver
B) Heart
C) Skin
D) Brain
Answer:- C) Skin.
31. Which of these is not a sense organ?
A) Eye
B) Nose
C) Heart
D) Ear
Answer:- C) Heart.
32. Which part of the body produces insulin?
A) Kidney
B) Liver
C) Pancreas
D) Lungs
Answer:- C) Pancreas.
33. Which vitamin is obtained from sunlight?
A) A
B) B
C) C
D) D
Answer:- D) D.
34. Which of these is a chemical change?
A) Melting ice
B) Burning paper
C) Boiling water
D) Freezing milk
Answer:- B) Burning paper
35. Which blood group has no antigens?
A) A
B) B
C) O
D) AB
Answer:- C) O.
36. Which organ filters blood in the body?
A) Heart
B) Kidney
C) Liver
D) Lungs
Answer:- B) Kidney.
37. What is the function of chlorophyll?
A) Give color to flowers
B) Help in breathing
C) Absorb sunlight for photosynthesis
D) Store food
Answer:- C) Absorb sunlight for photosynthesis.
38. Which acid is found in the stomach?
A) Sulfuric acid
B) Nitric acid
C) Hydrochloric acid
D) Acetic acid
Answer:- C) Hydrochloric acid.
39. Which is the hardest substance in the human body?
A) Bone
B) Tooth enamel
C) Skull
D) Cartilage
Answer:- B) Tooth enamel.
40. Which part of the flower produces pollen?
A) Ovary
B) Anther
C) Petal
D) Sepal
Answer:- B) Anther.
41. Which part of the body is affected by asthma?
A) Brain
B) Heart
C) Lungs
D) Liver
Answer:- C) Lungs.
42. What is the unit of electric power?
A) Ohm
B) Joule
C) Watt
D) Volt
Answer:- C) Watt.
43. Which gas do plants absorb from the air?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Hydrogen
Answer:- C) Carbon dioxide.
44. Which part of the ear helps in balancing the body?
A) Pinna
B) Eardrum
C) Cochlea
D) Semi-circular canals
Answer:- D) Semi-circular canals.
45. Which one is an example of a carbohydrate?
A) Butter
B) Rice
C) Fish
D) Egg
Answer:- B) Rice.
46. The process of separating solid from a liquid is called:
A) Evaporation
B) Condensation
C) Filtration
D) Sedimentation
Answer:- C) Filtration.
47. Which device is used to convert solar energy into electrical energy?
A) Generator
B) Dynamo
C) Solar cell
D) Battery
Answer:- C) Solar cell.
48. Which of these is a herbivore?
A) Tiger
B) Lion
C) Cow
D) Dog
Answer:- C) Cow.
49. Which process do plants use to make food?
A) Respiration
B) Transpiration
C) Photosynthesis
D) Germination
Answer:- C) Photosynthesis.
50. Which organ helps to pump blood?
A) Lungs
B) Liver
C) Brain
D) Heart
Answer:- D) Heart.