Give the major elimination product obtained from an ${\mathrm{E}}_2$ reaction of the following alkyl halide with hydroxide ion.

${\left({\mathrm{CH}}_3\right)}_2\mathrm{CHCH}\left(\mathrm{Cl}\right){\mathrm{CH}}_2{\mathrm{CH}}_3$

Give the major elimination product obtained from an ${\mathrm{E}}_2$ reaction of the following alkyl halide with hydroxide ion.

${\mathrm{CH}}_3\mathrm{CH}\left(\mathrm{Cl}\right){\mathrm{CH}}_2\mathrm{CH}={\mathrm{CH}}_2$

Find out the major product of the following reactant by dehydration.

Find out the product of the following reactant by dehydration.

For each of the following reactions, indicate whether elimination will occur via an $\mathrm{E}2 \text{or} \text{an} \mathrm{E}1$ reaction. Give the major product in each case.

For each of the following reactions, indicate whether elimination will occur via an $\mathrm{E}2$ or an $\mathrm{E}1$ reaction. Give the major product in each case.

For each of the following reactions, indicate whether elimination will occur via an $\mathrm{E}2$ or an $\mathrm{E}1$reaction. Give the major product in each case.

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For each of the following reactions, indicate whether
elimination will occur via an $\mathrm{E}2$ or an $\mathrm{E}1$ reaction. Give
the major product in each case.

Propose mechanism for each of the following reactions.