Previous year questions · Haryana Police Constable

Haryana Police Constable General Science — Previous Year Questions

150 General Science questions asked in past Haryana Police Constable papers, split into 15 timed practice sets — every question with its answer and explanation.

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About Haryana Police Constable General Science previous year questions

This page collects every General Science question that has appeared in past Haryana Police Constable papers on AajExam — 150 questions in total, organised into 15 short, timed practice sets. Each question is shown with its four options, the correct answer, and an explanation of the reasoning, so you can use the page either as a self-test or as a revision reference. Why previous year questions are the highest-value General Science preparation you can do for Haryana Police Constable: recruitment boards reuse a stable pool of concepts across cycles. The wording changes, the underlying idea rarely does. Working through a few hundred genuine past General Science questions teaches you which sub-topics the paper actually rewards, how the examiner likes to frame distractors, and roughly how long each question type should take — none of which a syllabus document can tell you. How to use this page: attempt questions in blocks of ten without looking at the answers, then review every question you got wrong or guessed. Read the explanation for the concept, not just the answer letter. When a concept keeps catching you out, open the related topic page linked below and drill that single area before returning here. Repeat across the full bank, and track how your accuracy on the second pass compares with your first — a 15-20% improvement is normal and is the clearest sign your preparation is working. What is in this bank: the questions are transcribed from actual Haryana Police Constable question papers, kept in the original order and wording, with solutions written by subject specialists. Sets are free to attempt, work on mobile, and need no login to read. If you would rather practise a complete paper end to end under exam conditions, the full Haryana Police Constable previous-year papers are linked below as well.

General Science PYQs asked in Haryana Police Constable

A sample of 30 questions from the full bank of 150. Try each one before opening the solution — the remaining questions are in the timed practice sets below.

  1. Q1.Incubation period of duck eggs in days is

    • A.21
    • B.28
    • C.30
    • D.18
    Show answer

    Answer: B. 28

  2. Q2.Which soil is having pH less than 7.0?

    • A.Acidic soil
    • B.Alkaline soil
    • C.Calcareous soil
    • D.None of the above
    Show answer

    Answer: A. Acidic soil

  3. Q3.The Red Data Book contains a record of

    • A.Extinct species
    • B.Endangered species
    • C.Common species
    • D.Invasive species
    Show answer

    Answer: B. Endangered species

  4. Q4.An electric bulb is connected to a 220V generator. The current is 0.50 A. What is the power of the bulb?

    • A.440 W
    • B.110 W
    • C.11 W
    • D.44 W
    Show answer

    Answer: B. 110 W

  5. Q5.What is the primary function of pepsin in the digestion?

    • A.Break down of carbohydrates
    • B.Emulsify fats
    • C.Convert lipids into fatty acids
    • D.Digest proteins
    Show answer

    Answer: D. Digest proteins

  6. Q6.Rejupave Technology is related with

    • A.Dam construction
    • B.Road construction
    • C.Urban forest creation
    • D.None of the above
    Show answer

    Answer: B. Road construction

  7. Q7.The decomposition of vegetable matter into compost is an example of _______ reaction.

    • A.Calcination
    • B.Exothermic
    • C.Endothermic
    • D.Burning
    Show answer

    Answer: B. Exothermic

  8. Q8.Which of the following crops are typically sown during the rainy season?

    • A.Winter crops
    • B.Kharif crops
    • C.Spring crops
    • D.None of the above
    Show answer

    Answer: B. Kharif crops

  9. Q9.The scientific name of National Flower of India is

    • A.Nelumbo Nucifera Gaertn
    • B.Jasminum
    • C.Oryza sativa
    • D.None of the above
    Show answer

    Answer: A. Nelumbo Nucifera Gaertn

  10. Q10.Which of the following instrument is used to measure wind velocity?

    • A.Barometer
    • B.Hygrograph
    • C.Pyradiometer
    • D.Anemometer
    Show answer

    Answer: D. Anemometer

  11. Q11.One ampere is equal to

    • A.One coulomb per second
    • B.One volt per second
    • C.One joule per coulomb
    • D.One second per coulomb charge
    Show answer

    Answer: A. One coulomb per second

  12. Q12.The current through a resistor is inversely proportional to its

    • A.Potential difference
    • B.Resistance
    • C.Electrical charge
    • D.Heat dissipation
    Show answer

    Answer: B. Resistance

  13. Q13.Which of the following component is found in xylem tissue?

    • A.Sieve tubes
    • B.Phloem fibers
    • C.Tracheids
    • D.Companion cells
    Show answer

    Answer: C. Tracheids

  14. Q14.White Silver Chloride turns to _______ in sunlight.

    • A.Grey
    • B.Yellow
    • C.Red
    • D.None of the above
    Show answer

    Answer: A. Grey

  15. Q15.Metallic oxides are said to be

    • A.Neutral oxides
    • B.Acidic oxides
    • C.Basic oxides
    • D.None of the above
    Show answer

    Answer: C. Basic oxides

  16. Q16.Which one of the following is not a function of the liver?

    • A.Regulation of blood sugar
    • B.Enzyme activation
    • C.Detoxification
    • D.Reproduction
    Show answer

    Answer: D. Reproduction

  17. Q17.Proteins are made up of .......

    • A.Sugars
    • B.Amino acids
    • C.Fatty acids
    • D.Nucleic acids
    Show answer

    Answer: B. Amino acids

  18. Q18.Which vitamin is needed to prevent Xerophthalmia?

    • A.A
    • B.B
    • C.C
    • D.D
    Show answer

    Answer: A. A

  19. Q19.Hepatitis is a general term for a disease that is caused by:

    • A.Viruses
    • B.Bacteria
    • C.Parasites
    • D.All the above
    Show answer

    Answer: D. All the above

  20. Q20.What happens to the resistance of a wire when its length is doubled?

    • A.Gets doubled
    • B.Becomes half
    • C.Becomes nil
    • D.None of the above
    Show answer

    Answer: A. Gets doubled

  21. Q21.The resistance which can be changed as desired is called:

    • A.Wire joints
    • B.Fixed resistance
    • C.Variable resistance
    • D.A switch
    Show answer

    Answer: C. Variable resistance

  22. Q22.Rheostat is the other name of:

    • A.Fixed resistance
    • B.Variable resistance
    • C.Insulator
    • D.Conductor
    Show answer

    Answer: B. Variable resistance

  23. Q23.Which one is not the form of Biocides?

    • A.Salt
    • B.Iodine
    • C.Sugar
    • D.Bleach
    Show answer

    Answer: C. Sugar

  24. Q24.What is Rodenticide?

    • A.A medicine to kill worms
    • B.A medicine to kill animals
    • C.A lubricant
    • D.A pesticide
    Show answer

    Answer: D. A pesticide

  25. Q25.What is NBR?

    • A.Normal Acrylonitrile-butadiene rubber
    • B.Natural Acrylonitrile-butadiene rubber
    • C.N Acrylonitrile-butane rubber
    • D.Acrylonitrile-butadiene rubber
    Show answer

    Answer: D. Acrylonitrile-butadiene rubber

  26. Q26.What is the average temperature of cow and buffalo?

    • A.98.4 F
    • B.100 F
    • C.101.5 F
    • D.102 F
    Show answer

    Answer: C. 101.5 F

  27. Q27.The light enters the eye through a thin membrane structure, this is called

    • A.Optic nerve
    • B.Retina
    • C.Iris
    • D.Cornea
    Show answer

    Answer: D. Cornea

  28. Q28.Fowl Cholera is caused by

    • A.Salmonella pullorum
    • B.Paramyxo virus type 1
    • C.Vibrio cholera
    • D.Pasteurella multocida
    Show answer

    Answer: D. Pasteurella multocida

  29. Q29.Excessive irrigation with dry climatic regions (Punjab and Haryana) leads to the deposition of salt on the top layer of the soil. In such cases farmers are advised to add which of the following minerals to solve the problem of salinity in the soil?

    • A.Corundum
    • B.Calcite
    • C.Gypsum
    • D.None of the above
    Show answer

    Answer: C. Gypsum

  30. Q30.When area of cross-section of a pipe increases, the velocity of flow of the liquid

    • A.Becomes zero
    • B.Remains the same
    • C.Increases
    • D.Decreases
    Show answer

    Answer: D. Decreases

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Frequently Asked Questions

How many Haryana Police Constable General Science previous year questions are available?

150 General Science questions from past Haryana Police Constable papers are available on AajExam, split into 15 practice sets. New questions are added as fresh papers are released.

Are the answers and explanations free?

Yes. Every question on this page shows its correct answer and explanation free of charge, and you do not need an account to read them. A free account only adds attempt tracking and performance analytics.

Do Haryana Police Constable repeat questions from previous years?

Exact repeats do occur, but the more reliable pattern is conceptual: the same General Science sub-topics reappear cycle after cycle with reworded questions. That is why working through past questions raises your score more reliably than reading theory alone.

How should I use these questions in my Haryana Police Constable preparation?

Attempt a set of ten cold, review every wrong and guessed question with its explanation, then drill the weak sub-topic on its topic page before moving on. Revisit the same set after a few days — your second-attempt accuracy is the honest measure of whether the concept stuck.

Haryana Police Constable General Science practice sets

Each set is a timed 10-question drill drawn from the same question bank.

Related General Science topics