Predict all the alkenes that would be formed by dehydrohalogenation of the following halides with sodium ehoxide in ethanol and indentify major alkene.
a. `I-` Bromo `-1-` mehylecyclohexane
b. Chcolhexylmethyl bromide
c. `2-` Chloro `-2-` ilutane
d. `3-` Bromopent `1-` ene
e. `2,2,3-` Trimethyl `3-` bromopentane.

Explanation

(i) 2-Methylbut-2-ene (major) + 2-methylbut-1-ene (ii) 3,4,4-Trimethylpent-2-ene (major) + 2,3,3-trimethylpent-1-ene
(iii) 1-Methylcyclohexene (major) + methylene cyclohexane (iv) same as (iii)