General Science Questions (MCQs) for Competitive Examinations

General Science Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations.

21. What is the S.I. unit of absorptive power?

[A] dioptre
[B] metre
[C] ampere
[D] No unit

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22. Which of the following is the phenomenon responsible for the trade winds?

[A] Convection
[B] Conduction
[C] Radiation
[D] None of the above

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23. What is a Carnot engine?

[A] A reversible refrigeration device operating between two temperatures
[B] A reversible heat engine operating between two temperatures
[C] An irreversible heat engine operating between two temperatures
[D] A reversible heat engine operating between multiple range of temperatures

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24. What of the following represents Ohm’s law (V= potential difference and I=current)?

[A] V = I 2
[B] V = 1/I
[C] V/I = constant
[D] None of the above

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25. In which of these transistors, the two segments of n-type semiconductor are separated by a segment of p-type semiconductor?

[A] p-n-p transistor
[B] n-p-n transistor
[C] Both a and b
[D] None

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26. Which of the following is a correct statement about minerals and ores?

[A] All minerals are ores
[B] All ores are minerals
[C] Minerals are the native form in which various metals exist
[D] Ores are usually used to extract metals economically

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27. Which of the following is the correct order of the decreasing order of abundance of the elements in earth’s crust?

[A] Iron > Silicon > Oxygen >Aluminium
[B] Oxygen > Silicon > Aluminium > Iron
[C] Oxygen> Iron > Aluminium > Silicon
[D] Iron > Aluminium > Silicon > Oxygen

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28. Which of these ores is not an oxide?

[A] Sphalerite
[B] Haematite
[C] Cuprite
[D] Magnetite

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29. Choose the incorrect statement:

[A] Epsom salt is an ore containing Sodium
[B] Bauxite is an ore of Aluminium
[C] Asbestos is an ore containing Calcium
[D] Milarite mineral contains Nickel

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30. Which of the following is not a Halide mineral?

[A] Cryolite
[B] Carnalite
[C] Calamine
[D] Fluorite

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