Which compound is soluble in water?

What is the product formed when phenylmagnesium bromide reacts with methanol?

The reagent used for the conversion of allyl alcohol into propenal is

An aromatic compound $A$ of the molecular formula $C_8H_{10}O$ on reaction with iodine and dilute $NaOH$ gives a yellow precipitate. The structure of the compound is expected to be

Compound $A$ of molecular formula $C_4H_{10}O$ on treatment with Lucas reagent at room temperature gives compound $B$. When compound $B$ is heated with alcoholic $KOH$,it gives isobutene. Compound $A$ and $B$ are respectively:

Which of the following processes is best suited to distinguish between $1-propanol$ and $2-propanol$?