Chemistry MCQs with answers Page - 19

Here, you will find a collection of MCQ questions on Chemistry. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. The coating of a thin layer of zinc on steel or iron objects is known as

  • (A) Hot dipping
  • (B) Tinning
  • (C) Galvanising
  • (D) Electroplating

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Q. A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed?

  • (A) From brown to blue-black
  • (B) From brown to orange-red
  • (C) From blue to pink
  • (D) From pink to blue-green

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Q. An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a :

  • (A) Power transmittor
  • (B) Battery
  • (C) Uninterrupted power supply (UPS)
  • (D) Generator

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Q. The metals commonly used for electroplating are

  • (A) Gold, Sodium and Chromium
  • (B) Chromium, Copper and Nickel
  • (C) Nickel, Lead and Chromium
  • (D) Gold, Sodium and Potassium

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Q. The process of improving the quality of rubber by heating it with sulphur is called

  • (A) Vulcanization
  • (B) Acceleration
  • (C) Sulphonation
  • (D) Galvanization

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Q. Rusting of iron takes place due to

  • (A) Oxidation
  • (B) Carbonation
  • (C) Exfoliation
  • (D) Corrosion

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Q. Combustion of a candle is a/an

  • (A) Photochemical reaction
  • (B) Physical change
  • (C) Endothermic reaction
  • (D) Exothermic reaction

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Q. Which of the following is chiefly present in LPG (Liquefied Petroleum Gas) ?

  • (A) Methane
  • (B) Ethane
  • (C) Propane
  • (D) Butane

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