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JEE Main & Advanced Sample Paper JEE Main Sample Paper-45

  • question_answer
    Index of unsaturation (H-deticiency) of \[{{C}_{8}}{{H}_{10}}\] is ...... and if it has six - membered ring, it can be

    A)                

    B)  

    C)                               

    D)  All are correct

    Correct Answer: D

    Solution :

     Degree of unsaturation \[=\frac{2{{n}_{1}}+2-{{n}_{2}}}{2}\]where, \[{{n}_{1}}=\] number of carbon atoms \[{{n}_{2}}=\] number of hydrogen atoms \[\therefore \] Degree of unsaturation \[=\frac{2\times 8+2-10}{2}=4\] 1. Degree of unsaturation means one \[C=C,\] one \[C\equiv C,\] and one ring. 2. Degree of unsaturation means three \[C=C,\] bond and one ring,


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