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 of the following are the most and the least electronegative elements in the periodic table?
[A] Fluorine and Caesium
[B] Hydrogen and Helium
[C] Carbon and Oxygen
[D] Chlorine and Fluorine

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2. Which among the following scientists had discovered Radium?
[A] Marie and Pierre Curie
[B] Andre-Louis Debierne
[C] Kasimir Fajans
[D] Oswald Helmuth Gohring

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3. Galvanizing is a metallurgical process that is used to coat steel or iron with which of the following?
[A] Zinc
[B] Lead
[C] Chromium
[D] Copper

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4. The atomic weight of Chlorine is 35. It consists of _______?
[A] 17 Protons + 18 Neutrons
[B] 17 Neutrons + 18 protons
[C] 17 Neutrons + 17 Protons + 1 electron
[D] None of the above

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5. Charles Goodyear is known for which of the following ?
[A] Experiments on Rubber Plants
[B] Vulcanization of Rubber
[C] Invention of Radial Tyres
[D] Invention of Artificial Rubber

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6. Which of these is not considered an ore?
[A] Chalcopyrite
[B] Sphalerite
[C] Cinnabar
[D] Andesite

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7. Consider the following substances:

  1. Iodine
  2. Naphthalene
  3. Camphor

Which of the above substances undergo ‘sublimation’ on heating?

[A] Only 1 and 2
[B] All of them
[C] Only 2 and 3
[D] Only 1 and 3

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8. Which of the following are two predominant acids of acid rain?
[A] sulphuric acid and nitric acid
[B] carbonic acid and hydrochloric acid
[C] nitric acid and hydrochloric Acid
[D] hydrofluoric acid and hydrochloric Acid

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9. Which of the following is not an isotope of Hydrogen?
[A] Protium
[B] Para hydrogen
[C] Deuterium
[D] Tritium

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10. Which of the following chemicals is also known as “Chinese snow”?
[A] Silver iodide
[B] Potassium nitrate
[C] Ammonium chloride
[D] Sodium phosphate

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