Top 30 Everyday Science MCQs for Competitive Exams in Pakistan (2026)

Everyday Science in Competitive Exams: What to Expect

Everyday Science (also called General Science) is a core subject in all Pakistani competitive exams, carrying 10–15 marks in FPSC, PPSC, NTS, CSS, and PMS papers. Unlike academic science exams that test complex formulas, Everyday Science in competitive exams focuses on practical, concept-based knowledge — the kind of science you encounter in daily life.

The subject covers six main areas: Human Biology, Chemistry, Physics, Environmental Science, Inventions & Discoveries, and Space & Astronomy. Below, we cover the highest-frequency MCQs with explanations, followed by a strategic preparation plan.

Human Body & Biology MCQs

Q1. What is H₂O?

• A) Hydrogen Peroxide
• B) Water ✅
• C) Heavy Water
• D) Hydrochloric Acid

Explanation: H₂O is the chemical formula for water — two hydrogen atoms bonded to one oxygen atom. H₂O₂ is hydrogen peroxide, and D₂O is heavy water. Watch for these similar-looking formulas in exams.

Q2. Which vitamin deficiency causes night blindness?

• A) Vitamin A ✅
• B) Vitamin B
• C) Vitamin C
• D) Vitamin D

Explanation: Vitamin A (Retinol) is essential for vision, particularly in low light. Its deficiency causes night blindness (nyctalopia) and in severe cases, complete blindness. Sources include carrots, sweet potatoes, and liver. This is one of the most repeated science MCQs in FPSC/PPSC exams.

Q3. The largest organ of the human body is?

• A) Liver
• B) Heart
• C) Skin ✅
• D) Brain

Explanation: Skin is the largest organ, covering approximately 1.5–2 square metres in adults. The liver is the largest internal organ. This distinction is a common exam question.

Physics & Chemistry

Q4. What is the speed of light?

• A) 200,000 km/s
• B) 300,000 km/s ✅
• C) 400,000 km/s
• D) 150,000 km/s

Explanation: The speed of light in a vacuum is approximately 299,792 km/s (rounded to 300,000 km/s or 3×10⁸ m/s). It takes about 8 minutes and 20 seconds for sunlight to reach Earth.

Vitamin Deficiency Chart — Must Memorise

This topic alone generates 2–3 questions per exam:

• Vitamin A — Night blindness, dry skin
• Vitamin B1 (Thiamine) — Beriberi
• Vitamin B3 (Niacin) — Pellagra
• Vitamin B12 — Anaemia
• Vitamin C — Scurvy (bleeding gums)
• Vitamin D — Rickets (in children), Osteomalacia (in adults)
• Vitamin K — Blood clotting problems

Drill these with One Paper flashcards until they are automatic — they appear in almost every competitive exam.

Top 10 Most Tested Science Topics

1. Vitamin deficiency diseases — A, B, C, D, K deficiencies and symptoms
2. Human body organs — Largest organ, blood types, RBC/WBC functions
3. Chemical formulas — H₂O, NaCl, CO₂, H₂SO₄, CaCO₃
4. Environmental science — Ozone layer, greenhouse gases, acid rain causes
5. Inventions & inventors — Telephone, radio, penicillin, X-rays, dynamite
6. Space facts — Planets, distance from sun, first man on moon
7. SI units — Newton, Joule, Pascal, Hertz, Ampere
8. Scientific instruments — Barometer, seismograph, thermometer, stethoscope
9. Light & sound — Speed of light, speed of sound, rainbow formation
10. Common diseases — Causes, symptoms, prevention of major diseases

How to Prepare for Everyday Science

Strategy 1: Concept over Formulas — Competitive exam science is about concepts, not calculations. Focus on understanding "why" things happen rather than memorising equations.

Strategy 2: Daily Practice — Practice 15–20 science MCQs daily on One Paper's Everyday Science quiz. The adaptive system will focus you on the subcategories where you make the most mistakes.

Strategy 3: Visual Learning — For topics like the human body and the solar system, visual diagrams dramatically improve retention. Draw the digestive system, label bones and organs.

Strategy 4: Cross-subject Links — Everyday Science overlaps with Computer Science (especially technology topics) and General Knowledge (inventions, discoveries). Studying them in sequence saves time.

Finish your preparation with mock tests and review your science accuracy on the dashboard.

Conclusion

Everyday Science rewards focused preparation on high-frequency topics. Memorise the vitamin chart, learn the top inventions, and practise concept-based MCQs daily on One Paper. With 2–3 weeks of dedicated practice, you can secure 85%+ in this section. Start your science practice now.