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

Intro: This is GSA Practice Set 20 — 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. Which is the largest island in the world? A) Madagascar B) Borneo C) Greenland D) Sumatra

Q2. Which gas is used for welding? A) Oxygen B) Acetylene C) Nitrogen D) Carbon dioxide

Q3. Which is the fastest bird in the world? A) Eagle B) Ostrich C) Peregrine falcon D) Sparrow

Q4. Which organ helps us to smell? A) Ear B) Nose C) Eye D) Tongue

Q5. What is the chemical symbol for gold? A) Gd B) Go C) Au D) Ag

Q6. Which planet has the shortest year? A) Venus B) Earth C) Mercury D) Mars

Q7. Which gas is used to preserve food? A) Oxygen B) Carbon dioxide C) Nitrogen D) Hydrogen

Q8. Which animal gives us milk? A) Dog B) Cat C) Cow D) Horse

Q9. What is the main function of roots in a plant? A) Make food B) Absorb water C) Produce seeds D) Support leaves

Q10. Which is the smallest bone in the human body? A) Femur B) Stapes C) Humerus D) Tibia

Section B — General Ability (Q11–Q20):

Q11. If 8 pens cost Rs 80, what is the cost of 1 pen (same price)? A) Rs 8 B) Rs 10 C) Rs 12 D) Rs 16

Q12. Next number in the series: 5, 10, 15, 20, ? A) 22 B) 23 C) 25 D) 30

Q13. What is 50% of 200? A) 50 B) 75 C) 100 D) 150

Q14. If c + 7 = 17, what is c? A) 8 B) 9 C) 10 D) 11

Q15. What is the square of 30? A) 600 B) 700 C) 800 D) 900

Q16. What is the cube of 5? A) 25 B) 100 C) 125 D) 150

Q17. How many sides does a decagon have? A) 8 B) 9 C) 10 D) 12

Q18. How many minutes are there in 1 hour? A) 30 B) 45 C) 60 D) 90

Q19. What is 300 + 200? A) 400 B) 450 C) 500 D) 550

Q20. What is 900 – 300? A) 500 B) 600 C) 700 D) 800

Answer Key + Explained Answers:

Q1 – C) Greenland. Greenland is the largest island (about 2.16 million sq km). Madagascar is 4th, Borneo is 3rd, Sumatra is 6th.

Q2 – B) Acetylene. Acetylene is used for welding (oxy-acetylene flame). Oxygen is for breathing, nitrogen is inert, CO2 is exhaled.

Q3 – C) Peregrine falcon. Peregrine falcon is the fastest bird (over 380 km/h in a dive). Eagle is fast, ostrich is flightless, sparrow is slow.

Q4 – B) Nose. Nose helps us to smell. Ear hears, eye sees, tongue tastes.

Q5 – C) Au. Gold is Au (from Latin “aurum” = gold). Gd is gadolinium, Go is not a symbol, Ag is silver.

Q6 – C) Mercury. Mercury has the shortest year (about 88 days). Venus is 225 days, Earth is 365 days, Mars is 687 days.

Q7 – C) Nitrogen. Nitrogen is used to preserve food (inert atmosphere). Oxygen spoils food, CO2 is for soft drinks, hydrogen is flammable.

Q8 – C) Cow. Cow gives us milk. Dog is a pet, cat is a pet, horse is a ride animal.

Q9 – B) Absorb water. Roots absorb water (and minerals). Leaves make food, fruits produce seeds, stems support leaves.

Q10 – B) Stapes. Stapes (in the ear) is the smallest bone. Femur is largest, humerus is arm, tibia is leg.

Q11 – B) Rs 10. One pen = 80 divided by 8 = Rs 10.

Q12 – C) 25. Each term adds 5: 5 + 5 = 10, 10 + 5 = 15, 15 + 5 = 20, 20 + 5 = 25. (22, 23, 30 are not +5.)

Q13 – C) 100. 50% of 200 = 0.50 × 200 = 100.

Q14 – C) 10. c + 7 = 17, so c = 17 – 7 = 10.

Q15 – D) 900. 30 squared = 30 × 30 = 900. (600, 700, 800 are not squares of 30.)

Q16 – C) 125. 5 cubed = 5 × 5 × 5 = 125. (25 = 5 squared, 100 and 150 are not cubes of 5.)

Q17 – C) 10. A decagon has 10 sides (deca = ten). Octagon has 8, nonagon has 9, dodecagon has 12.

Q18 – C) 60. 1 hour = 60 minutes.

Q19 – C) 500. 300 + 200 = 500.

Q20 – B) 600. 900 – 300 = 600.

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 Greenland (largest island), acetylene (welding), peregrine falcon (fastest bird), nose (smell), Au (gold), Mercury (shortest year), nitrogen (preserve food), cow (milk), roots (absorb water), stapes (smallest bone). General Ability: practise unitary method, +5 series, percentages, algebra, squares / cubes, shapes (decagon 10), time (1 hour = 60 minutes), addition / subtraction. 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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