a)Give chemical tests to distinguish between compounds in each of the following pairs: i) Benzaldehyde and Acetone ii)Phenol and Ethanol b)Give reasons for the following: i)Although –$NH_2$ group is an ortho and para directing group, nitration of aniline gives along with ortho and para as well as meta derivative also, why? ii)Conc.HI is preferable used in the cleavage of ether linkage. Explain. iii)Out of $PCl_5$ and $SOCl_2$ which one is a better reagent for the conversion of alcohol to alkyl chloride and why?

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