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Practice Set: General Science

Authored CAPF-level general science MCQs with answer key and explanations, each linked to its Paper I note, not verbatim PYQs

CAPF wiki•4 min read•4 sections
At a glance
PaperPaper ISubjectGeneral Science

Practice questions (authored for this wiki), not verbatim PYQs. Written to mirror the CAPF Paper I level across everyday physics, chemistry, and biology. Attempt closed-book, then check the key.

Questions

Q1Deficiency of which vitamin causes night blindness?
  1. AVitamin A
  2. BVitamin B12
  3. CVitamin C
  4. DVitamin D
Q2The SI unit of electric current is the:
  1. AVolt
  2. BWatt
  3. CAmpere
  4. DOhm
Q3Which gas is most responsible for the greenhouse effect from human activity?
  1. AOxygen
  2. BNitrogen
  3. CCarbon dioxide
  4. DHydrogen
Q4Match List I (Instrument) with List II (Use):
  1. ABarometer 1. Measures atmospheric pressure
  2. BSeismograph 2. Records earthquakes
  3. CHygrometer 3. Measures humidity
  4. DAnemometer 4. Measures wind speed Codes:
  5. AA-1, B-2, C-3, D-4
  6. BA-2, B-1, C-3, D-4
  7. CA-1, B-2, C-4, D-3
  8. DA-3, B-2, C-1, D-4
Q5Which disease is caused by a deficiency of iodine?
  1. AScurvy
  2. BGoitre
  3. CRickets
  4. DBeriberi

Q6 (statement-based). Consider the following:

  1. The sky appears blue because of the scattering of light (Rayleigh scattering).
  2. A rainbow is formed by the dispersion of light through water droplets.
  3. We see a mirage because of the reflection of light by clouds. Which are correct?
  • (a) 1 and 2 only
  • (b) 2 and 3 only
  • (c) 1 and 3 only
  • (d) 1, 2 and 3
Q7The chemical name of common salt is:
  1. ASodium bicarbonate
  2. BSodium chloride
  3. CCalcium carbonate
  4. DPotassium chloride
Q8India's first indigenously built aircraft carrier is:
  1. AINS Vikrant
  2. BINS Viraat
  3. CINS Vikramaditya
  4. DINS Arihant

Q9 (assertion-reason). Assertion (A): A person can float more easily in sea water than in river water. Reason (R): Sea water is denser than river water, so it provides greater buoyant force.

  • (a) Both A and R are true, and R is the correct explanation of A
  • (b) Both A and R are true, but R is not the correct explanation of A
  • (c) A is true, R is false
  • (d) A is false, R is true
Q10Which part of the human body produces insulin?
  1. ALiver
  2. BPancreas
  3. CKidney
  4. DSpleen
Q11The hardest naturally occurring substance is:
  1. AQuartz
  2. BIron
  3. CDiamond
  4. DGranite
Q12Which of the following is a scalar quantity?
  1. AVelocity
  2. BForce
  3. CSpeed
  4. DAcceleration
Q13The Indian Space Research Organisation (ISRO) launched its Mars Orbiter Mission, known as:
  1. AChandrayaan
  2. BMangalyaan
  3. CAditya
  4. DGaganyaan

Answer key

Reveal the answer key and full worked solutions
Q Answer
1 (a) Vitamin A
2 (c) Ampere
3 (c) Carbon dioxide
4 (a) A-1, B-2, C-3, D-4
5 (b) Goitre
6 (a) 1 and 2 only
7 (b) Sodium chloride
8 (a) INS Vikrant
9 (a) Both true, R is the correct explanation
10 (b) Pancreas
11 (c) Diamond
12 (c) Speed
13 (b) Mangalyaan

Explanations

  • Q1. Vitamin A deficiency causes night blindness (and xerophthalmia). See biology cell and classification.
  • Q2. The ampere is the SI unit of electric current; volt is potential difference, watt is power, ohm is resistance. See physics everyday.
  • Q3. Carbon dioxide is the dominant human-emitted greenhouse gas; methane and water vapour also contribute. See chemistry everyday.
  • Q4. Barometer measures atmospheric pressure, seismograph records earthquakes, hygrometer measures humidity, anemometer measures wind speed. See physics everyday.
  • Q5. Iodine deficiency causes goitre (enlargement of the thyroid gland). See biology cell and classification.
  • Q6. Statements 1 and 2 are correct. A mirage is caused by the refraction (bending) and total internal reflection of light through air layers of different density, not reflection by clouds, so statement 3 is wrong. See physics everyday.
  • Q7. Common salt is sodium chloride (NaCl); sodium bicarbonate is baking soda. See chemistry everyday.
  • Q8. INS Vikrant (commissioned 2022) is India's first indigenously built aircraft carrier; INS Vikramaditya was acquired from Russia. See how to prepare current affairs for capf.
  • Q9. Both true and correctly linked: sea water is denser, so by Archimedes' principle it exerts a greater buoyant force, making floating easier. See physics everyday.
  • Q10. The pancreas produces insulin (from its beta cells); its deficiency causes diabetes. See biology cell and classification.
  • Q11. Diamond, a form of carbon, is the hardest naturally occurring substance. See chemistry everyday.
  • Q12. Speed has magnitude only, so it is a scalar; velocity, force, and acceleration have direction and are vectors. See physics everyday.
  • Q13. Mangalyaan was ISRO's Mars Orbiter Mission (2013); Chandrayaan is the lunar programme. See how to prepare current affairs for capf.

Cross-references

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