The intermediates formed during the reac...

The intermediates formed during the reaction of `R-overset(O)overset(||)C-NH_(2)` with `Br_(2)` and KOH are :

RCONHBr and RNCO

RNHCOBr and RNCO

RNH-Br and RCONHBr

`RCONBr_2`

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The decreasing order of rate of reaction for the following compounds towards S_(N)2Th (bimolecular nucleophilic substitution with tetrahedral intermediate) reaction is (i) CH_(3)-CH_(2)-overset(O)overset(||)C-NH_(2) (ii) CH_(3)-CH_(2)-overset(O)overset(||)C-Br (iii) CH_(3)-CH_(2)-overset(O)overset(||)C-O-overset(O)overset(||)C-CH_(2)-CH_(3) (iv) CH_(3)-CH_(2)-overset(O)overset(||)C-O-C_(2)H_(5)

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