HydrocarbonsHard

Question

The bond dissociation energy of the C–H bond for the compounds
(I) CH3 − H                         (II) CH3CH2 − H
(III) CH2 = CHCH2 – H      (IV) C6H5 − H
decreases in the order -

Options

A.I > II > III > IV
B.IV > III > II > I
C.IV > I > II > III
D.II > I > IV > III

Solution

according to bond stability ,IV is most stable due to resonance present 

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