Which is the final product obtained by the reaction of Grignard reagent ethyl magnesium bromide with propanone?

Which among the following isomers of $C_4H_9OH$ has the lowest boiling point?

Which of the following is $NOT$ a characteristic property of alcohols?

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$:
Assertion $A$: Alcohols react both as nucleophiles and electrophiles.
Reason $R$: Alcohols react with active metals such as sodium,potassium and aluminum to yield corresponding alkoxides and liberate hydrogen.
In the light of the above statements,choose the correct answer from the options given below:

Which among the following reactions occurs by the breaking of $C-O$ bond in alcohol?

Identify the major products $A$ and $B$ respectively in the following set of reactions.