The hyperconjugative effect in the compoundsI) CH3CH=CH2II) (CH3)2CH-CH=CH2    III) (CH3)3C-CH=CH2 is of the order

Order of Hyper conjugation effectAs the number of α -Hydrogens decreases,number of hyper conjugative structures [H.C structures] decreases,that is hyper conjugation effect decreases,and hence stability of alkene decreases.