A) \[Cu+2AgN{{O}_{3}}\xrightarrow{{}}Cu{{(N{{O}_{3}}\text{)}}_{2}}+2Ag\]
B) \[2KBr+{{I}_{2}}\xrightarrow{{}}2KI+B{{r}_{2}}\]
C) \[Fe+{{H}_{2}}S{{O}_{4}}\xrightarrow{{}}FeS{{O}_{4}}+{{H}_{2}}\]
D) \[CuO+{{H}_{2}}\xrightarrow{{}}Cu+{{H}_{2}}O\]
Correct Answer: B
Solution :
\[2KBr+{{I}_{2}}\xrightarrow{{}}2KI+B{{r}_{2}}\] This reaction is not possible because the reactivity of \[{{I}_{2}}\] is less than \[B{{r}_{2}}\].
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