Maximum solubility of alcohol in water is due to

What is the correct order of reactivity of the following alcohols towards $H-X$?
$(I) \; CH_2 = CH - OH$
$(II) \; CH_2 = CH - CH_2OH$
$(III) \; CH_3 - CH_2 - OH$
$(IV) \; CH_3 - CH(OH) - CH_3$

Which of the following alcohols will yield alkyl chloride at once on reaction with concentrated $HCl$ and $ZnCl_2$ at room temperature?

Identify the product formed when $(R)-2-$butanol and $(S)-2-$butanol react with $(R,R)-$tartaric acid in an acidic medium.

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

The number of primary $(1^{\circ})$,secondary $(2^{\circ})$ and tertiary $(3^{\circ})$ alcohols possible for the formula $C_5H_{12}O$ respectively are