How many Isomers does C6 H14 have?

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RRC Group D Previous Paper 43 (Held On: 22 Oct 2018 Shift 2)
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  1. 3
  2. 6
  3. 4
  4. 5

Answer (Detailed Solution Below)

Option 4 : 5
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The correct answer is 5.

  • C6​H14​ is hexane. It has 5 structural isomers like n-hexane, 2-methyl pentane, 3-methyl pentane, 2,2-dimethyl butane, 2,3-dimethyl butane.

Important Points

  • Compounds with different physical properties were found to have the same elemental composition and molecular weight. Such compounds were called isomers.
  • The below table shows the number of constitutional isomers for each of the acyclic alkanes CnH2n+2, where n=1-10.
  • If the number of carbon atoms increases, the number of possible constitutional isomers increases rapidly.
Acyclic Alkane Number of Carbons Number of Isomers
methane 1 1
ethane 2 1
propane 3 1
butane 4 2
pentane 5 3
hexane 6 5
heptane 7 9
octane 8 18
nonane 9 35
decane 10 75

 

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