Write the names of the reagents and equations for the preparation of the following ethers by Williamson's synthesis :
(i) 1- Propoxypropan`" "` (ii) 2-Methoxy-2-methylpropane `" " ` (iii) Ethoxybenzene `" " `(iv) Methoxyethane.

Explanation

(i) `CH_(3)underset(1-"Bromopropane")(CH_(2)CH_(2)Br)+CH_(3)underset("Sod.propoxde")(CH_(2)CH_(2)ONa)rarrCH_(3)underset(1-"Propoxypropane")(CH_(2)CH_(2)OCH_(2)CH_(2)CH_(3))+N`
(ii) `CH_(3)-underset(2-"propxide")underset("Sod-2-methyl-")underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-ONa+underset("Bromomethane")(CH_(3)Br)rarrCH_(3)-underset("methylpropane")underset(2-"Methoxy-2-")underset(CH_(3))underset(|)overset(CH_(3))overset(|)C-OCH_(3)+NaBr`
(iii)
(iv) `underset("Sod.ethoxide")(C_(2)H_(5)ONa)+underset("Bromoethane")(CH_(3)Br)rarrunderset("Methoxyethane")(C_(2)H_(5)-O-CH_(3))+NaBr`