GSA Practice Set 21 – General Science & Ability (20 Original MCQs Explained)

This is GSA Practice Set 21 — 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 cold desert in the world? A) Sahara Desert B) Gobi Desert C) Antarctic Desert D) Arabian Desert

Q2. Which gas is used in refrigerators? A) Oxygen B) Freon C) Nitrogen D) Carbon dioxide

Q3. Which is the largest land mammal in the world? A) Blue whale B) African elephant C) Giraffe D) Hippopotamus

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

Q5. What is the chemical symbol for silver? A) Si B) Sl C) Au D) Ag

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

Q7. Which gas is used in neon signs? A) Oxygen B) Carbon dioxide C) Neon D) Nitrogen

Q8. Which animal is known as “man’s best friend”? A) Cat B) Dog C) Horse D) Parrot

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

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

Section B — General Ability (Q11–Q20)

Q11. If 10 pens cost Rs 100, what is the cost of 1 pen (same price)? A) Rs 8 B) Rs 10 C) Rs 12 D) Rs 20

Q12. Next number in the series: 7, 14, 21, 28, ? A) 32 B) 33 C) 35 D) 36

Q13. What is 25% of 400? A) 50 B) 75 C) 100 D) 125

Q14. If d + 9 = 19, what is d? A) 8 B) 9 C) 10 D) 11

Q15. What is the square of 40? A) 1200 B) 1400 C) 1600 D) 1800

Q16. What is the cube of 6? A) 36 B) 180 C) 216 D) 256

Q17. How many sides does a nonagon have? A) 7 B) 8 C) 9 D) 10

Q18. How many days are there in 1 week? A) 5 B) 6 C) 7 D) 8

Q19. What is 400 + 300? A) 600 B) 650 C) 700 D) 750

Q20. What is 800 – 200? A) 500 B) 600 C) 700 D) 800

Answer Key + Explained Answers

Q1 – C) Antarctic Desert. Antarctic Desert is the largest cold desert (about 14 million sq km). Sahara is largest hot desert, Gobi is in Asia, Arabian is in Arabia.

Q2 – B) Freon. Freon is used in refrigerators (refrigerant). Oxygen is for breathing, nitrogen is inert, CO2 is exhaled.

Q3 – B) African elephant. African elephant is the largest land mammal. Blue whale is largest mammal overall, giraffe is tallest, hippopotamus is large.

Q4 – D) Tongue. Tongue helps us to taste. Ear hears, nose smells, eye sees.

Q5 – D) Ag. Silver is Ag (from Latin “argentum” = silver). Si is silicon, Sl is not a symbol, Au is gold.

Q6 – B) Venus. Venus has the longest day (about 243 Earth days). Mercury is 59 days, Earth is 24 hours, Mars is 24.6 hours.

Q7 – C) Neon. Neon is used in neon signs (glows red-orange). Oxygen is for breathing, CO2 is exhaled, nitrogen is inert.

Q8 – B) Dog. Dog is known as “man’s best friend”. Cat is a pet, horse is a ride animal, parrot is a talking bird.

Q9 – D) Support the plant. Stems support the plant. Leaves make food, roots absorb water, fruits produce seeds.

Q10 – C) Femur. Femur (thigh bone) is the longest bone. Humerus is arm, tibia is leg, stapes is smallest.

Q11 – B) Rs 10. One pen = 100 divided by 10 = Rs 10.

Q12 – C) 35. Each term adds 7: 7 + 7 = 14, 14 + 7 = 21, 21 + 7 = 28, 28 + 7 = 35. (32, 33, 36 are not +7.)

Q13 – C) 100. 25% of 400 = 0.25 × 400 = 100.

Q14 – C) 10. d + 9 = 19, so d = 19 – 9 = 10.

Q15 – C) 1600. 40 squared = 40 × 40 = 1600. (1200, 1400, 1800 are not squares of 40.)

Q16 – C) 216. 6 cubed = 6 × 6 × 6 = 216. (36 = 6 squared, 180 and 256 are not cubes of 6.)

Q17 – C) 9. A nonagon has 9 sides (nona = nine). Heptagon has 7, octagon has 8, decagon has 10.

Q18 – C) 7. 1 week = 7 days.

Q19 – C) 700. 400 + 300 = 700.

Q20 – B) 600. 800 – 200 = 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 Antarctic Desert (largest cold desert), freon (refrigerators), African elephant (largest land mammal), tongue (taste), Ag (silver), Venus (longest day), neon (neon signs), dog (man’s best friend), stems (support the plant), femur (longest bone). General Ability: practise unitary method, +7 series, percentages, algebra, squares / cubes, shapes (nonagon 9), time (1 week = 7 days), addition / subtraction. Re-attempt this set in 2 days.

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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