Chemistry MCQs

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

1. Which among the following are constituents of Brass?
[A] Zinc and Copper
[B] Iron and Zinc
[C] Copper and Nickel
[D] Iron and Copper

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2. Which of the following is the correct term used to describe Graphite, Carbon and Diamonds?
[A] Isotopes
[B] Isomers
[C] Isotones
[D] Allotropes

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3. Which of the following processes commonly use the method of adsorption?
[A] Scrubbers manufacturing
[B] Purification of solid substances
[C] Chromatography
[D] Purification of liquid substances

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4. Consider the following:

  1. Cinnabar is also known as mercurblende
  2. The color of Cinnabar varies from dull grey to bright green
  3. Cinnabar is the most common source ore for refining elemental mercury
  4. Cinnabar is the historic source for the brilliant blue pigment termed azure

Which of the statements given above are correct?

[A] Only 1 and 3
[B] Only 2 and 4
[C] 1, 3 and 4
[D] All Four

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5. Which among the following makes Chile saltpetre different from saltpetre?
[A] Nitrate
[B] Sodium
[C] Magnesium
[D] Calcium

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6. Consider the following: 

  1. Copper 
  2. Zinc
  3. Tin

Gun Metal is the alloy of which among the above?

[A] 1 & 2
[B] 1 & 3
[C] 2 & 3
[D] 1, 2 & 3

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7. Ground Level Ozone is formed due to reaction between:
[A] VOCs, Oxides of Nitrogen & Sunlight
[B] VOCs, Sulphur dioxide & Sunlight
[C] Ozone, Sulphur dioxide & Oxides of Nitrogen
[D] Ozone, Oxides of Nitrogen & Sunlight

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8. Which of the following element has the highest first ionization enthalpy?
[A] Magnesium
[B] Strontium
[C] Beryllium
[D] Barium

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9. Water Gas is a mixture of?
[A] CO and H2
[B] CO and H2O
[C] CO2 and H2
[D] None of the Above

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10. Choose the incorrect ‘Alloy – constituent metal’ pair:
[A] Lockalloy – Iron
[B] Vitallium – Cobalt
[C] Italma – Aluminium
[D] Constantan – Copper

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