Chlorobenzene can be prepared by reacting aniline with

(a) nitrous acid followed by heating with cuprous chloride

(b) chlorine in presence of anhydrous aluminium chloride

(c) cuprous chloride

(d) hydrochloric acid

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When propyne is treated with aqueous H2SOpresence of H2SOthe major product is

(1) acetone

(2) propanol

(3) propanal

(4) propyl hydrogen sulphate

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