• # question_answer Excess of KI reacts with $CuS{{O}_{4}}$ solution and then $N{{a}_{2}}{{S}_{2}}{{O}_{3}}$ solution is added to it. Which of the statements is incorrect for this reaction  [AIEEE 2004] A) $N{{a}_{2}}{{S}_{2}}{{O}_{3}}$ is oxidised B) $Cu{{I}_{2}}$ is formed C) $C{{u}_{2}}{{I}_{2}}$is formed D) Evolved ${{I}_{2}}$ is reduced

$2\overset{\,\,-1}{\mathop{KI}}\,+2CuS{{O}_{4}}\to {{\overset{\text{O}}{\mathop{I}}\,}_{2}}+C{{u}_{2}}{{I}_{2}}+2{{K}_{2}}S{{O}_{4}}$ ${{\overset{\text{O}}{\mathop{I}}\,}_{2}}+2N{{a}_{2}}\overset{+2}{\mathop{{{S}_{2}}}}\,{{O}_{3}}\to \overset{+2.5}{\mathop{N{{a}_{2}}}}\,{{S}_{4}}{{O}_{6}}+\overset{\,\,\,\,\,-1}{\mathop{2NaI}}\,$