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(a) How do you convert the following...

(a) How do you convert the following
(i) Ethanal to propanone
(ii ) Toluene to benzoic acid
(b) (A),(B ) and (C ) are three non cyclic functional isomers of a carbonyl compound with molecular formula ` C_4H_8 O`. isomers (A) and (C) give positive Tollen's test whereas isomers (B) does not give Tollen's test but gives positive iodoform test , isomers (A) and (B) on reduction with `Zn(Hg)`/conc. HCl gives the same product (D)
(i) Write the structures of (A), (B), (C) and (D)
(ii) out of A,B and (C) isomers which one is least reactive towards additions of HCN

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(A), (B) and (C ) are three non-cylic funtional isomers of a carbonyl compound with molecular formula C_(4)H_(8)O . Isomers (A) and (C ) give positive Tollen's test whereas isomer (B) does not give Tollens' test but gives positive iodoform test. Isomers (A) and (B) on reduction with Zn(Mg) | conc. HCl give the same product (D). (a) Write the structures of (A), (B) ,(C) and (D). (b) Out of (A), (B) and (C ) isomers, which one is least reactive towards addition of HCN ?

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