Ethers are practically inert towards which of the following?

Assertion : The major products formed by heating $C_6H_5CH_2OCH_3$ with $HI$ are $C_6H_5CH_2I$ and $CH_3OH$.
Reason : Benzyl cation is more stable than methyl cation.

What are the products of the following reaction?

On boiling with concentrated hydrobromic acid,phenyl ethyl ether will yield:

Identify the missing reagent in the following reaction: $C_6H_5OCH_3 + (?) \rightarrow \text{p-methoxyacetophenone (major)} + \text{o-methoxyacetophenone (minor)}$

The products formed during the following reaction are:
$(CH_{3})_{3}C-O-CH_{3} + HI \rightarrow ?$