The product of the given reaction is :-

($\mathrm{D}-2$-Butanol)

 

Correct decreasing order of reactivity of given compounds towards $\mathrm{E}1$ reaction is:

The major product of the following reaction is:

$\frac{{\mathrm{H}}_3{\mathrm{PO}}_4}{\mathrm{\Delta }}$The major product $\left(\mathrm{X}\right)$ The major product $\text{'}\mathrm{X}\text{'}$is:

$\left(\mathrm{X}\right)$ and $\left(\mathrm{Y}\right)$ in the following reaction are respectively: