(a) (i) Write the mechanism of the following reaction: 2+1 2 CH_3 CH_2 OH →[413 K ] H^+ CH_3- CH_2- O - CH_2- CH_3+ H_2 O (ii) Why ortho-nitrophenol…

Write the mechanism of the following reaction: $\displaystyle 2+1$ \[2 \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH} \xrightarrow[413 \mathrm{~K}]{\mathrm{H}^{+}} \mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{O}-\mathrm{CH}_{2}-\mathrm{CH}_{3}+\mathrm{H}_{2} \mathrm{O} \]

Why ortho-nitrophenol is steam volatile while para-nitrophenol is not?

What happens when

Anisole is treated with $\displaystyle \mathrm{CH}_{3} \mathrm{C} l /$ anhydrous $\displaystyle \mathrm{A} l \mathrm{Cl}_{3}$?

Phenol is oxidised with $\displaystyle \mathrm{Na}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} / \mathrm{H}^{+}$?

$\displaystyle \left(\mathrm{CH}_{3}\right)_{3} \mathrm{C}-\mathrm{OH}$ is heated with $\displaystyle \mathrm{Cu} / 573 \mathrm{~K}$? Write chemical equation in support of your answer.