Which of the following compounds reacts with ethylmagnesium bromide and also decolourizes bromine water solution:

Which of the following compounds reacts with water-

Which of the following pair of compounds react with bromine water?

Which one of the following compounds does not react with bromine

Which of the following compound does not react with Fehling's solution?

All of the following compounds reacts with ethylmagnesium bromide. Alcohols are formed from three of the compounds. Which one does not give an alcohol ?