In which of the following transformations is phosphorus pentachloride $(PCl_5)$ used as a reagent?

Predict the major product for the following reaction:
$m-CH_3O-C_6H_4-CH_2CH_2-O-CH(CH_3)Ph \xrightarrow{HI (excess), \text{heat}} ?$

Which among the following compounds is obtained as a major product $X$ in the reaction given below?
Anisole $\xrightarrow[AlCl_3 \text{ (anhydrous)}]{acetyl chloride} X$

Consider the following reaction:
Statement $I$: In the above reaction,the product formed will be a mixture of benzyl alcohol and iodobenzene.
Statement $II$: In the above reaction,the $-O-CH_2-$ bond is cleaved to give the product.
In the light of the above statements,choose the correct answer from the options given below:

Which of the following ethers is gaseous at room temperature?

An organic compound $'A'$ $(C_9H_{10}O)$ when treated with conc. $HI$ undergoes cleavage to yield compounds $'B'$ and $'C'$. $'B'$ gives a yellow precipitate with $AgNO_3$ whereas $'C'$ tautomerizes to $'D'$. $'D'$ gives a positive iodoform test. $'A'$ could be :