GSA Practice Set 11 – General Science & Ability (20 Original MCQs Explained)

Intro: This is GSA Practice Set 11 — 20 original MCQs: 10 General Science (Q1–Q10) and 10 General Ability (Q11–Q20). Attempt all 20 in 25 minutes without looking at the answers, then check the explained answers and review your weak section. These are original practice questions, not copied from FPSC papers or competitor question banks, and this site is not affiliated with FPSC. Scoring: 18–20 = strong. 15–17 = good. 12–14 = fair, revise the sections you missed. Below 12 = study the weak-section review, then re-attempt in 2 days.

Section A — General Science (Q1–Q10):

Q1. What is the chemical symbol for oxygen? A) Ox B) O C) O2 D) Og

Q2. What is the chemical symbol for water? A) H2O B) CO2 C) NaCl D) O2

Q3. What is the chemical symbol for gold? A) Ag B) Au C) Gd D) Go

Q4. Which gas do plants absorb for photosynthesis? A) Oxygen B) Nitrogen C) Carbon dioxide D) Hydrogen

Q5. Which planet is closest to the Sun? A) Venus B) Mercury C) Earth D) Mars

Q6. Which planet has the most confirmed moons (as of recent counts)? A) Jupiter B) Saturn C) Mars D) Neptune

Q7. What is known as the powerhouse of the cell? A) Nucleus B) Ribosome C) Mitochondria D) Golgi body

Q8. What is the boiling point of water at sea level? A) 90°C B) 95°C C) 100°C D) 120°C

Q9. Which vitamin is produced in the skin by sunlight? A) Vitamin A B) Vitamin B C) Vitamin C D) Vitamin D

Q10. Which organ pumps blood around the human body? A) Liver B) Lung C) Heart D) Kidney

Section B — General Ability (Q11–Q20):

Q11. If 6 pens cost Rs 60, what is the cost of 1 pen (same price)? A) Rs 6 B) Rs 10 C) Rs 12 D) Rs 60

Q12. Next number in the series: 5, 10, 15, 20, ? A) 22 B) 24 C) 25 D) 30

Q13. What is 10% of 500? A) 5 B) 25 C) 50 D) 100

Q14. If x + 5 = 12, what is x? A) 5 B) 6 C) 7 D) 17

Q15. What is the square of 9? A) 18 B) 27 C) 81 D) 99

Q16. What is the cube of 3? A) 9 B) 27 C) 33 D) 81

Q17. Which blood cells carry oxygen around the body? A) White blood cells B) Red blood cells C) Platelets D) Plasma cells

Q18. What is the SI unit of electric current? A) Volt B) Ohm C) Watt D) Ampere

Q19. What is the SI unit of power? A) Volt B) Watt C) Joule D) Ampere

Q20. What is the speed of light in vacuum (approximately)? A) 300 km/s B) 3,000 km/s C) 30,000 km/s D) 300,000 km/s

Answer Key + Explained Answers:

Q1 – B) O. The chemical symbol for oxygen is O. “O2” is the molecule (two oxygen atoms); “Ox” and “Og” are not symbols (Og is Oganesson).

Q2 – A) H2O. Water is H2O (two hydrogen + one oxygen). CO2 is carbon dioxide, NaCl is common salt, O2 is oxygen gas.

Q3 – B) Au. Gold is Au (from Latin “aurum” = gold). Ag is silver, Gd is gadolinium, “Go” is not a symbol.

Q4 – C) Carbon dioxide. Plants absorb carbon dioxide (CO2) for photosynthesis and release oxygen. Oxygen is released, not absorbed; nitrogen and hydrogen are not the main gas absorbed for photosynthesis.

Q5 – B) Mercury. Mercury is closest to the Sun, then Venus, Earth, Mars. (Venus is second, Earth third, Mars fourth.)

Q6 – B) Saturn. Saturn has the most confirmed moons (146 as of recent counts, more than Jupiter’s 95+). Mars has 2, Neptune has 16. Note: counts change as new moons are confirmed — Saturn leads as of recent counts.

Q7 – C) Mitochondria. Mitochondria produce energy (ATP) — the powerhouse of the cell. Nucleus controls, ribosome makes proteins, Golgi body packages.

Q8 – C) 100°C. Water boils at 100°C (212°F) at sea level (standard atmospheric pressure). At higher altitude, boiling point is lower. 90°C / 95°C are below boiling; 120°C is above.

Q9 – D) Vitamin D. Vitamin D is produced in skin by sunlight (UV). Vitamin A (vision), B (energy), C (immunity) are not produced by sunlight.

Q10 – C) Heart. The heart pumps blood around the body. Liver detoxifies, lungs exchange gases, kidneys filter blood.

Q11 – B) Rs 10. One pen = 60 ÷ 6 = Rs 10.

Q12 – C) 25. Each term adds 5: 5 + 5 = 10, 10 + 5 = 15, 15 + 5 = 20, 20 + 5 = 25. (22, 24, 30 are not +5.)

Q13 – C) 50. 10% of 500 = 0.10 × 500 = 50.

Q14 – C) 7. x + 5 = 12 → x = 12 – 5 = 7.

Q15 – C) 81. 9² = 9 × 9 = 81. (18 = 9 × 2, 27 = 9 × 3, 99 is not a square.)

Q16 – B) 27. 3³ = 3 × 3 × 3 = 27. (9 = 3², 33 and 81 are not cubes of 3.)

Q17 – B) Red blood cells. Red blood cells (RBCs) carry oxygen (via haemoglobin). White blood cells fight infection, platelets clot blood, plasma is the fluid.

Q18 – D) Ampere. Ampere (A) is the SI unit of electric current. Volt = voltage, Ohm = resistance, Watt = power.

Q19 – B) Watt. Watt (W) is the SI unit of power. Volt = voltage, Joule = energy, Ampere = current.

Q20 – D) 300,000 km/s. Speed of light in vacuum ≈ 300,000 km/s (3 × 10⁸ m/s). 300, 3,000, 30,000 km/s are far too slow.

Weak-Section Review:

Which section did you score lowest in? Write the 3 questions you missed, the correct answers, and one line for each explaining why. General Science: revise symbols (O, H2O, Au), photosynthesis (CO2 absorbed), planets (Mercury closest, Saturn most moons), cell (mitochondria), boiling point (100°C), Vitamin D (sunlight), heart (pumps blood), RBCs (carry oxygen), units (Ampere current, Watt power), light speed (300,000 km/s). General Ability: practise unitary method, +5 series, percentages, algebra, squares / cubes. Re-attempt this set in 2 days.

Closing line: These are original practice questions written for csspastpapers.pk. They are not FPSC official questions, and this site is not affiliated with FPSC.

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