Chemistry Questions Answers

• 36. Which of the primary component of natural gas?

  1. Ethane
  2. Propane
  3. Methane
  4. Butane

  Answer And Explanation

  Answer: Option C

  Explanation:

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• 37. The metal used to recover copper from a solution of copper sulphate is ?

  1. Na
  2. Ag
  3. Hg
  4. Fe

  Answer And Explanation

  Answer: Option D

  Explanation:

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• 38. Which gas is used in fire extinguishers ?
  

  1. Carbon dioxide
  2. Nitrogen oxide
  3. Carbon monoxide
  4. Sulpher dioxide

  Answer And Explanation

  Answer: Option A

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• 39. The metallurgical process in which a metal is obtained in a fused state is called ?

  1. roasting
  2. calcinations
  3. smelting
  4. froth floatation

  Answer And Explanation

  Answer: Option C

  Explanation:

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• 40. Which of the following is produced during the formation of photochemical smog ?

  1. Nitrogen Oxides
  2. Hydrocarbons
  3. Methane
  4. Ozone

  Answer And Explanation

  Answer: Option D

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• 41. Which of the following gas is used in cigarette lighters ?

  1. Butane
  2. Propane
  3. Methane
  4. Ethane

  Answer And Explanation

  Answer: Option A

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• 42. Biogas majorly contains ?
  

  1. Ethane
  2. Methane
  3. Hydrogen
  4. CO

  Answer And Explanation

  Answer: Option B

  Explanation:

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