General Science is part of almost every recruitment test in Pakistan, from PPSC and FPSC to NTS, OTS and armed forces initial tests. Below are 20 important General Science MCQs with correct answers and a one-line explanation, so you understand the concept instead of just memorising it.
General Science MCQs (1 to 20)
- The chemical formula of water is:
(a) H2O2 (b) H2O (c) CO2 (d) HO
Answer: (b) H2O. Two hydrogen atoms join one oxygen atom. - The largest planet in our solar system is:
(a) Saturn (b) Earth (c) Jupiter (d) Neptune
Answer: (c) Jupiter - Which planet is known as the Red Planet?
(a) Venus (b) Mars (c) Mercury (d) Uranus
Answer: (b) Mars. Iron oxide on its surface gives it a red colour. - The planet closest to the Sun is:
(a) Mercury (b) Venus (c) Earth (d) Mars
Answer: (a) Mercury - The SI unit of force is:
(a) Joule (b) Watt (c) Newton (d) Pascal
Answer: (c) Newton - The SI unit of electric current is:
(a) Volt (b) Ampere (c) Ohm (d) Coulomb
Answer: (b) Ampere - The speed of light in vacuum is about:
(a) 3 × 10^5 m/s (b) 3 × 10^6 m/s (c) 3 × 10^8 m/s (d) 3 × 10^10 m/s
Answer: (c) 3 × 10^8 m/s - Sound cannot travel through:
(a) Water (b) Air (c) Steel (d) Vacuum
Answer: (d) Vacuum. Sound needs a medium to travel. - Pure water boils at sea level at:
(a) 90°C (b) 100°C (c) 110°C (d) 120°C
Answer: (b) 100°C - The pH of pure water is:
(a) 5 (b) 7 (c) 9 (d) 14
Answer: (b) 7. It is neutral. - The hardest natural substance is:
(a) Iron (b) Gold (c) Diamond (d) Quartz
Answer: (c) Diamond - Plants absorb which gas from the air for photosynthesis?
(a) Oxygen (b) Nitrogen (c) Carbon dioxide (d) Hydrogen
Answer: (c) Carbon dioxide - The powerhouse of the cell is:
(a) Nucleus (b) Ribosome (c) Mitochondria (d) Golgi body
Answer: (c) Mitochondria. It produces energy for the cell. - Which blood cells fight infection?
(a) Red blood cells (b) White blood cells (c) Platelets (d) Plasma
Answer: (b) White blood cells - Insulin is produced by the:
(a) Liver (b) Kidney (c) Pancreas (d) Stomach
Answer: (c) Pancreas - Our skin makes which vitamin in sunlight?
(a) Vitamin A (b) Vitamin C (c) Vitamin D (d) Vitamin K
Answer: (c) Vitamin D - Lack of iron in the body causes:
(a) Scurvy (b) Anaemia (c) Rickets (d) Goitre
Answer: (b) Anaemia - An adult human body has how many bones?
(a) 196 (b) 206 (c) 216 (d) 306
Answer: (b) 206 - The human heart has how many chambers?
(a) 2 (b) 3 (c) 4 (d) 5
Answer: (c) 4. Two atria and two ventricles. - Normal human body temperature is about:
(a) 35°C (b) 37°C (c) 39°C (d) 40°C
Answer: (b) 37°C (98.6°F)
How to Prepare General Science for Tests
- Start with 9th and 10th class Physics, Chemistry and Biology basics. Most test questions come from this level.
- Learn SI units, famous scientists and their inventions, and common diseases with their causes.
- Practise 20 to 30 MCQs every day and revise the ones you get wrong.
- Read the explanation, not just the answer. Concepts help you solve new questions.
Also practise our Pakistan General Knowledge MCQs to cover the second most common section of recruitment tests.