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Mini-Test: General Science

Subject-wise 25-question CAPF Paper I general science mini-test with answer key and one-line explanations, authored practice not verbatim PYQs

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PaperPaper ISubjectGeneral Science
Test SeriesMini TestGeneral SciencePaper 1Practice

Authored practice, not a verbatim PYQ. Twenty-five questions across everyday physics, chemistry, biology, environment and technology, calibrated to the CAPF Paper I level, which favours clean factual recall over derivation. Attempt closed-book in about 25 minutes, then check the key. CAPF applies one-third negative marking.

Questions

Q1Deficiency of which vitamin causes night blindness?
  1. AVitamin A
  2. BVitamin C
  3. CVitamin D
  4. DVitamin K
Q2Which gas is most abundant in the Earth's atmosphere?
  1. AOxygen
  2. BCarbon dioxide
  3. CNitrogen
  4. DArgon
Q3The chemical formula of common salt is:
  1. ANaCl
  2. BKCl
  3. CCaCO3
  4. DNaHCO3
Q4The SI unit of electric current is the:
  1. AVolt
  2. BWatt
  3. CAmpere
  4. DOhm
Q5Which part of the human body produces insulin?
  1. ALiver
  2. BPancreas
  3. CKidney
  4. DSpleen
Q6The process by which green plants make food using sunlight is called:
  1. ARespiration
  2. BTranspiration
  3. CPhotosynthesis
  4. DGermination
Q7The number of bones in the adult human body is:
  1. A196
  2. B206
  3. C216
  4. D256
Q8Which acid is present in the human stomach and aids digestion?
  1. ASulphuric acid
  2. BNitric acid
  3. CHydrochloric acid
  4. DAcetic acid
Q9The speed of light in a vacuum is approximately:
  1. A3 × 105 m/s
  2. B3 × 108 m/s
  3. C3 × 106 m/s
  4. D3 × 1010 m/s
Q10Which blood group is the universal donor?
  1. AAB positive
  2. BA positive
  3. CO negative
  4. DB positive
Q11Hard water can be softened by removing which ions?
  1. ASodium and potassium
  2. BCalcium and magnesium
  3. CChloride and nitrate
  4. DIron and copper
Q12The unit of measuring the loudness of sound is the:
  1. AHertz
  2. BDecibel
  3. CPascal
  4. DNewton
Q13Match List I (Disease) with List II (Causative agent):
  1. AMalaria 1. Protozoa (Plasmodium)
  2. BTuberculosis 2. Bacteria
  3. CCOVID-19 3. Virus
  4. DRingworm 4. Fungus Codes:
  5. AA-1, B-2, C-3, D-4
  6. BA-2, B-1, C-3, D-4
  7. CA-1, B-3, C-2, D-4
  8. DA-3, B-2, C-1, D-4
Q14Which is the powerhouse of the cell?
  1. ANucleus
  2. BRibosome
  3. CMitochondria
  4. DGolgi body
Q15The pH value of a neutral solution at 25° Celsius is:
  1. A0
  2. B7
  3. C10
  4. D14
Q16Which of the following is a noble (inert) gas?
  1. AHydrogen
  2. BOxygen
  3. CArgon
  4. DNitrogen
Q17Rusting of iron is an example of which type of chemical change?
  1. AReduction
  2. BOxidation
  3. CNeutralisation
  4. DSublimation
Q18The first law of motion is also known as the law of:
  1. AAcceleration
  2. BInertia
  3. CConservation of momentum
  4. DGravitation
Q19Which vitamin is synthesised in the human skin on exposure to sunlight?
  1. AVitamin A
  2. BVitamin B12
  3. CVitamin C
  4. DVitamin D
Q20The hardest naturally occurring substance is:
  1. AQuartz
  2. BGraphite
  3. CDiamond
  4. DCorundum
Q21Which gas is mainly responsible for the depletion of the ozone layer?
  1. ACarbon dioxide
  2. BMethane
  3. CChlorofluorocarbons
  4. DSulphur dioxide
Q22DNA carries genetic information; its full form is:
  1. ADeoxyribonucleic acid
  2. BDiribonucleic acid
  3. CDinucleic acid
  4. DDeoxyribose acid

Q23 (statement-based). Consider the following about greenhouse gases:

  1. Carbon dioxide is a greenhouse gas.
  2. Methane has a higher warming potential per molecule than carbon dioxide.
  3. Water vapour is the most abundant greenhouse gas. Which are correct?
  • (a) 1 and 2 only
  • (b) 2 and 3 only
  • (c) 1 and 3 only
  • (d) 1, 2 and 3
Q24The functional unit of the kidney is the:
  1. ANeuron
  2. BNephron
  3. CAlveolus
  4. DHepatocyte
Q25Which one of the following is a renewable source of energy?
  1. ACoal
  2. BNatural gas
  3. CSolar energy
  4. DPetroleum

Answer key

Reveal the answer key and full worked solutions
Q Answer
1 (a) Vitamin A
2 (c) Nitrogen
3 (a) NaCl
4 (c) Ampere
5 (b) Pancreas
6 (c) Photosynthesis
7 (b) 206
8 (c) Hydrochloric acid
9 (b) 3 × 108 m/s
10 (c) O negative
11 (b) Calcium and magnesium
12 (b) Decibel
13 (a) A-1, B-2, C-3, D-4
14 (c) Mitochondria
15 (b) 7
16 (c) Argon
17 (b) Oxidation
18 (b) Inertia
19 (d) Vitamin D
20 (c) Diamond
21 (c) Chlorofluorocarbons
22 (a) Deoxyribonucleic acid
23 (d) 1, 2 and 3
24 (b) Nephron
25 (c) Solar energy

Explanations

  • Q1. Vitamin A deficiency causes night blindness and, in severe cases, xerophthalmia. See nutrition diseases and health.
  • Q2. Nitrogen makes up about 78 percent of the atmosphere by volume, oxygen about 21 percent. See environment and ecology.
  • Q3. Common salt is sodium chloride, NaCl. See chemistry everyday.
  • Q4. The ampere is the SI unit of electric current. See physics everyday.
  • Q5. The pancreas produces insulin through the islets of Langerhans (beta cells). See human body and systems.
  • Q6. Photosynthesis converts carbon dioxide and water into glucose using sunlight and chlorophyll. See biology cell and classification.
  • Q7. An adult human has 206 bones (a newborn has about 270 that later fuse). See human body and systems.
  • Q8. Hydrochloric acid in gastric juice aids digestion and kills pathogens. See human body and systems.
  • Q9. Light travels at about 3 × 108 metres per second in vacuum. See physics everyday.
  • Q10. O negative blood is the universal donor because it lacks A, B and Rh antigens. See human body and systems.
  • Q11. Hardness is caused by dissolved calcium and magnesium salts, removed during softening. See chemistry everyday.
  • Q12. Loudness of sound is measured in decibels; frequency is measured in hertz. See physics everyday.
  • Q13. Malaria is protozoal, tuberculosis bacterial, COVID-19 viral and ringworm fungal. See nutrition diseases and health.
  • Q14. Mitochondria generate ATP and are called the powerhouse of the cell. See biology cell and classification.
  • Q15. A neutral solution has a pH of 7 at 25° Celsius. See chemistry everyday.
  • Q16. Argon is a noble (inert) gas of Group 18; hydrogen, oxygen and nitrogen are reactive. See chemistry everyday.
  • Q17. Rusting is the slow oxidation of iron in the presence of oxygen and moisture. See chemistry everyday.
  • Q18. Newton's first law, the law of inertia, states a body stays at rest or in uniform motion unless acted on by a net force. See physics everyday.
  • Q19. Vitamin D is synthesised in the skin on exposure to ultraviolet sunlight. See nutrition diseases and health.
  • Q20. Diamond, an allotrope of carbon, is the hardest natural substance. See chemistry everyday.
  • Q21. Chlorofluorocarbons release chlorine that breaks down stratospheric ozone. See environment and ecology.
  • Q22. DNA stands for deoxyribonucleic acid, the carrier of genetic information. See biotechnology and genetics.
  • Q23. All three statements are correct: CO2 is a greenhouse gas, methane has a higher per-molecule warming potential, and water vapour is the most abundant greenhouse gas. See environment and ecology.
  • Q24. The nephron is the functional unit of the kidney; the neuron belongs to the nervous system. See human body and systems.
  • Q25. Solar energy is renewable; coal, natural gas and petroleum are fossil (non-renewable) fuels. See environment and ecology.

Cross-references

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