Give the major product formed by heating the following ethers with conc. HI and mentioning `S_(N^(1))` or `S_(N^(2))` mechanism.
(i) `C_(6)H_(5)-O-CH_(3)`(Methoxybenzene)
(ii) `C_(6)H_(5)CH_(2)-O-C_(2)H_(5)`(Benzyl ethyl ether)
(iii) `C_(6)H_(5)CH_(2)-O-C_(6)H_(5)`(Benzyl phenyl ether)

Explanation

[Hint]
`underset("Phenol")(C_(6)H_(5)OH)+CH_(3)I(S_(N^(2))` reaction, `1^(@)` R group)
(ii) `underset("Benzyl iodide")(C_(6)H_(5)CH_(2)I)+underset("Ethanol")(C_(2)H_(5)OH)(S_(N^(1))` reaction, due to stability of benzyl `C^(+))`
(iii) `underset("Phenol")(C_(6)H_(5)OH)+CH_(3)I(S_(N^(2))` reaction, `1^(@)` R group)
(ii) `underset("Benzyl iodide")(C_(6)H_(5)CH_(2)I)+underset("Ethanol")(C_(2)H_(5)OH)(S_(N^(1))` reaction, due to stability of benzyl `C^(+))`