A) \[PB{{r}_{3}},KCN,{{H}_{3}}{{O}^{+}}\]
B) \[PB{{r}_{3}},KCN,{{H}_{2}}\]
C) \[HCN,PB{{r}_{3}},{{H}^{+}}\]
D) \[KCN,{{H}^{+}}\]
Correct Answer: A
Solution :
\[R-C{{H}_{2}}C{{H}_{2}}OH\xrightarrow{PB{{r}_{3}}}R-C{{H}_{2}}C{{H}_{2}}-Br\]\[\xrightarrow{KCN}R-C{{H}_{2}}-C{{H}_{2}}-CN\xrightarrow{{{H}_{3}}{{O}^{+}}}\] \[R-C{{H}_{2}}-C{{H}_{2}}COOH+N{{H}_{3}}\]
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