Chemistry MCQs with answers Page - 15

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Q. Highest percentage of carbon is found in which form of coal?

  • (A) Anthracite
  • (B) Bituminous
  • (C) Peat
  • (D) Lignite

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Q. The main source of carbon monoxide is

  • (A) Industrial process
  • (B) Fuel combustion
  • (C) Transportation
  • (D) Solid waste disposal

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Q. Highly toxic gas which causes headache, visual difficulty, paralysis and even death is

  • (A) CO2
  • (B) O3
  • (C) CO
  • (D) All of these

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Q. Water gas is the combination of

  • (A) CO and H2
  • (B) CO2and H2
  • (C) CO and H2O
  • (D) CO2 and CO

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Q. The gas that causes suffocation and death when coal or coke is burnt in a closed room is

  • (A) Methane
  • (B) Ethane
  • (C) Carbon monoxide
  • (D) Carbon dioxide

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Q. Which type of fire extinguisher is used for petroleum fire ?

  • (A) Foam type
  • (B) Soda acid type
  • (C) Powder type
  • (D) None of these

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Q. Man dies in the atmosphere of CO, because it

  • (A) Dries up the blood
  • (B) Combines with O2 present in the body
  • (C) Reduces the organic matter of tissues
  • (D) Combines with the haemoglobin of blood, thereby making the later incapable of absorbing O2

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Q. It is dangerous to leave the car engine running in a closed garage, because it may cause serious pollution due to poisoning by emission of

  • (A) CO2
  • (B) CO
  • (C) Unburnt petrol
  • (D) SO2

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