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UPSC Prelims 2001Question 115Science & Technology

Which one of the following is the correct sequence in increasing order of molecular weights of the hydrocarbons ?

Options

  1. (a)Methane, ethane, propane and butane
  2. (b)Propane, butane, ethane and methane
  3. (c)Butane, ethane, propane and methane
  4. (d)Butane, propane, ethane and methane

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