1.

Compund A reacts with PCl_(5) to give B which on treatment with KCN followed by hydrolysis gave propanoic acid. What is A and B respectively

Answer»

`C_(3)H_(8) and C_(3)H_(7)Cl`
`C_(2)H_(6) and C_(2)H_(5)Cl`
`C_(2)H,Cl and C_(2)H_(5)Cl`
`C_(2)H_(5)OH and C_(2)H_(5)Cl`

Solution :`{:(C_(2)H_(5)OH+PCl_(5)to C_(2)H_(5)Cl+POCl_(3)+ HCL),(" "(A)""(B)),(C_(2)H_(5)Cl+KCNto C_(2)H_(5)CN+KCl),(" "(B)""DARR"HYDROLYSIS"),(""C_(2)H_(5)-COOH):}`


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