Which cycloalkane has the lowest heat of combustion per CH2 group

  1. A

    Cyclopropane

  2. B

    Cyclobutane

  3. C

    Cyclopentane

  4. D

    Cyclohexane

    Join Our Infinity Learn's Learning Program!

    FREE Lve Classes, PDFs, Solved Questions, PYQ's, Mock Tests, Practice Tests, and Test Series!

    +91

    Verify OTP Code (required)


    I agree to the terms and conditions and privacy policy.

    Solution:

    In cyclopropane. the angle strain is maximum hence it is a highly strained molecule and consequently most unstable. The angle strain in cyclobutane is less than that in cyclopropane. hence cyclobutane is more stable than cyclopropane. This stability increases up to 6 membered rings. then decreases from 7 to 11 membered rings and from the 12 membered onwards attains the stability of 6 membered ring. Heat of combustion is a method of measuring chemical stability Hence cyclohexane has the lowest heat of combustion per CH2 group. 

    Chat on WhatsApp

      Join Infinity Learn Regular Class Program!

      Sign up & Get instant access to FREE PDF's, solved questions, Previous Year Papers, Quizzes and Puzzles!

      +91

      Verify OTP Code (required)





      I agree to the terms and conditions and privacy policy.