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: Organ used to pump blood in the human body
A) Brain
B) Heart
C) Liver
D) Lungs
✅ Correct Answer: B
Explanation: The heart circulates blood throughout the body via arteries and veins.
Q: Metal that reacts quickly with water
A) Sodium
B) Silver
C) Copper
D) Iron
✅ Correct Answer: A
Explanation: Sodium reacts violently with water, producing heat and hydrogen gas.
Q: Primary gas responsible for greenhouse effect
A) Oxygen
B) Carbon dioxide
C) Hydrogen
D) Nitrogen
✅ Correct Answer: B
Explanation: Carbon dioxide traps heat in Earth’s atmosphere, contributing to global warming.
Q: Device converting solar energy into electricity
A) Transformer
B) Solar panel
C) Dynamo
D) Battery
✅ Correct Answer: B
Explanation: Solar panels capture sunlight and convert it into electrical energy.
Q: Strongest naturally occurring material
A) Steel
B) Diamond
C) Quartz
D) Graphite
✅ Correct Answer: B
Explanation: Diamond has the highest hardness on the Mohs scale of mineral hardness.