Science MCQs
Science MCQs cover physics, chemistry, and biology basics, ideal for SSC, HSSC, and job exams. They enhance understanding of scientific concepts, laws, anatomy, and problem-solving skills essential for competitive and academic success.
Q: Speed of light in vacuum
A) 150,000 km/s
B) 450,000 km/s
C) 300,000 km/s
D) 600,000 km/s
✅ Correct Answer: C
Explanation: Speed of light in vacuum is nearly 300,000 kilometers per second.
Q: Human blood is composed of plasma and
A) Cells
B) Lymph
C) Cartilage
D) Bone
✅ Correct Answer: A
Explanation: Blood consists of red and white blood cells and platelets in plasma.
Q: Instrument used to measure temperature
A) Anemometer
B) Altimeter
C) Thermometer
D) Barometer
✅ Correct Answer: C
Explanation: Thermometers are used to measure body and environmental temperatures.
Q: Primary gas found in Earth's atmosphere
A) Carbon dioxide
B) Hydrogen
C) Oxygen
D) Nitrogen
✅ Correct Answer: D
Explanation: Nitrogen forms approximately 78% of Earth’s atmosphere.
Q: Newton’s third law deals with
A) Acceleration
B) Gravity
C) Inertia
D) Action and reaction
✅ Correct Answer: D
Explanation: Newton’s third law states every action has an equal and opposite reaction.