Which of the following has the highest boiling point?

Which of the following alcohols gives white turbidity almost immediately with the Lucas reagent at room temperature?
$(i)$ $n-$Butanol
$(ii)$ $tert-$Butanol
$(iii)$ Benzyl alcohol
$(iv)$ Allyl alcohol

Which of the following alcohols has the lowest boiling point?

Which of the following substances will produce acetaldehyde in the presence of an aqueous solution?

Suggest a reagent for the conversion of ethanol to ethanal.

Which of the following is a secondary allylic alcohol?