Different reagents used for the identification of different functional groups. Eg. (i)Tollens reagent used for the identification of -CHO, etc. (ii)CAN used for alcohol. {:("Column-I","Column-II","Column-III"),((I)"Benzaldehyde",(i)l_2+NaOH(aq.),(P)"Yellow crystals is formed"),((II)"Butan-1-ol",(ii)AgNO_3(aq.)+NH_4OH,(Q)"White ppt is formed"),((III)"Formic ester",(iii)anhy.ZnCl_2+conc.HCl,(R)"Silver mirror is formed"),((IV)"Acetophenone",(iv)(NH_4)_2[Ce(NO_3)_6](CAN),(S)"Wine red colouration"):} The only correct combination in which the reation does not proceed through redox mechanism ?

Different reagents used for the identification of different functional

1.	Different reagents used for the identification of different functional groups. Eg. (i)Tollens reagent used for the identification of -CHO, etc. (ii)CAN used for alcohol. {:("Column-I","Column-II","Column-III"),((I)"Benzaldehyde",(i)l_2+NaOH(aq.),(P)"Yellow crystals is formed"),((II)"Butan-1-ol",(ii)AgNO_3(aq.)+NH_4OH,(Q)"White ppt is formed"),((III)"Formic ester",(iii)anhy.ZnCl_2+conc.HCl,(R)"Silver mirror is formed"),((IV)"Acetophenone",(iv)(NH_4)_2[Ce(NO_3)_6](CAN),(S)"Wine red colouration"):} The only correct combination in which the reation does not proceed through redox mechanism ?
Answer» <P>(I),(ii),(R) (IV),(i)(P) (II),(iv)(S) (III),(ii)(R) Solution :When CAN react with R-OH there is no redox. `C_4H_9OH+underset("CAN (a yellow solid)")((NH_4)_2[CE(NO_3)_6])to[Ce(NO_3)_5(n-C_4H_9O)]^(2-)` Wine red complex `NH_4^+` ION present as spectators and so not partcipate.