Ethyl alcohol can be used in the preparation of which of the following?

Which of the following gives a ketone on oxidation?

Which of the following alcohols is the least soluble in water?

The substitution of the $-OH$ group of an alcohol or the $-COOH$ group of a carboxylic acid with a $-Cl$ atom is achieved by using which of the following?

Suggest the reagent for the following conversion:

What is the product of the reaction between phenylmagnesium bromide and methanol?