Science Top 30 Questions PYQ'S || Vigyan Ke 30 Sabse Jyada Aane Vale Prashn

🔬 Science Practice Quiz - 30 Questions

1. Water freezes at what temperature (Celsius)?

0°C
100°C
37°C

2. The powerhouse of the cell is?

Nucleus
Mitochondria
Ribosome

3. Which gas do humans exhale?

Oxygen
Carbon dioxide
Nitrogen

4. Earth revolves around the?

Moon
Mars
Sun

5. The largest organ in the human body is?

Heart
Skin
Liver

6. Photosynthesis mainly occurs in which part of the plant?

Root
Leaf
Stem

7. The chemical symbol of gold is?

Ag
Au
Pb

8. Which planet is known as the Red Planet?

Jupiter
Mars
Venus

9. Blood is pumped by which organ?

Lungs
Heart
Kidney

10. The SI unit of force is?

Newton
Joule
Pascal

11. Which vitamin is produced in the skin by sunlight?

Vitamin C
Vitamin D
Vitamin B12

12. The hardest substance in the human body is?

Bone
Enamel
Nail

13. Which gas is essential for respiration?

Oxygen
Carbon dioxide
Nitrogen

14. Which planet is closest to the Sun?

Mercury
Venus
Earth

15. What is H2O commonly known as?

Oxygen
Water
Hydrogen

16. Which part of the plant conducts water?

Phloem
Xylem
Leaf

17. The boiling point of water at sea level is?

100°C
0°C
50°C

18. Which metal is liquid at room temperature?

Mercury
Iron
Aluminium

19. Which gas is most abundant in the atmosphere?

Oxygen
Nitrogen
Carbon dioxide

20. Who discovered gravity?

Einstein
Newton
Galileo

21. Which organ purifies blood in humans?

Lungs
Kidney
Heart

22. What is the center of an atom called?

Electron
Proton
Nucleus

23. The fastest planet in the solar system is?

Venus
Mercury
Mars

24. Which vitamin deficiency causes scurvy?

Vitamin D
Vitamin C
Vitamin A

25. Which part of the brain controls balance?

Cerebrum
Cerebellum
Medulla

26. Which blood cells fight infections?

RBC
WBC
Platelets

27. Which device measures atmospheric pressure?

Barometer
Thermometer
Hygrometer

28. Which planet is known as Earth's twin?

Venus
Mars
Jupiter

29. What is the speed of light in vacuum?

3 × 10^8 m/s
3 × 10^6 m/s
3 × 10^5 m/s

30. Which gas do plants release during photosynthesis?

Oxygen
Carbon dioxide
Nitrogen

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