General Science Chemistry MCQs

Chemistry Objective (Multiple Choice) General Knowledge Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examination

31. What do we call the compounds of carbon having double or triple bonds between the carbon atoms?

[A] Saturated carbon compounds
[B] Unsaturated carbon compounds
[C] Fullerenes
[D] None of the above

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32. Who among the following conceived the first recognizable periodic table of chemical elements?

[A] Marie Skłodowska Curie
[B] Dmitri Mendeleev
[C] John Dalton
[D] Amedeo Avogadro

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33. Which of the following metal is the main constituent in Pewter alloy?

[A] Lead
[B] Zinc
[C] Tin
[D] Iron

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34. Which of the following is correct?

[A] A colloidal solution is a heterogeneous mixture
[B] A colloidal solution is a homogeneous mixture
[C] The particles of a colloidal solution cannot scatter beam of light
[D] None of the above

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35. Which of the following is correct about Manganin?

[A] It is an alloy of copper, manganese and nickel
[B] It has virtually zero temperature coefficient of resistance
[C] Both a and b
[D] None

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36. 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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37. What do we call the process of converting an ore into its oxide by heating it in a limited supply of air below its melting point?

[A] Roasting
[B] Calcination
[C] Leaching
[D] Liquation

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38. Bayer process is related to which of the following?

[A] production of Copper oxide
[B] production of Alumina
[C] production of Zinc oxide
[D] production of Silicon dioxide

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39. Which of the following quantum number is also known as orbital angular momentum?

[A] Principal quantum number
[B] Azimuthal quantum number
[C] Magnetic quantum number
[D] Electron spin quantum number

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40. Which of the following quantum numbers give information about the spatial orientation of the orbital with respect to standard set of co-ordinate axis?

[A] Azimuthal quantum number
[B] Principal quantum number
[C] Magnetic quantum number
[D] Electron spin quantum number

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