Q:
      
      
         
            
Place these hydrocarbons in order of decreasing boiling point.
1. Paraffin
2. Octadecane
3. Hexane
4. Neohexane and
5. Ethane
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: B) Paraffin > Octadecane > Hexane > Neohexane > Ethane         
         
Explanation: In hydrocarbon, the boiling point directly varies with the length of carbon chain. On increasing the number of carbon atom, the boiling point of the compound also increases. Paraffin contains highest number of carbon atoms whereas, ethane is comprised of two carbon atoms.
 
The decreasing order of boiling point of mention compounds is written as follows:
Paraffin > Octadecane > Hexane > Neohexane > Ethane
       
      
      
      
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