A) \[RNCO\]
B) \[RCO\overset{\,.\ .}{\mathop{N}}\,\]
C) \[RCO\overset{\,.\ .}{\mathop{N}}\,HBr\]
D) \[RNC\]
Correct Answer: D
Solution :
(i) \[\overset{\overset{O\,\,\,\,}{\mathop{||\,\,\,\,\,\,\,\,}}\,}{\mathop{RCN{{H}_{2}}}}\,\]+ Br2 + KOH ® RCONHBr+ KBr + H2O (ii) RCONHBr + KOH ® RNCO + KBr + H2O (iii) RNCO + 2KOH ® RNH2 + K2CO3 RCONH2 + Br2 + 4KOH ® RNH2 + 2KBr + K2CO3+2H2O
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