question_answer

Which of the following is redox reaction?

A)  \[2CuS{{O}_{4}}+4KI\to C{{u}_{2}}{{I}_{2}}+2{{K}_{2}}S{{O}_{4}}+{{I}_{2}}\]

B)  \[S{{O}_{2}}+{{H}_{2}}O\to {{H}_{2}}S{{O}_{3}}\]

C)  \[N{{a}_{2}}S{{O}_{4}}+BaC{{l}_{2}}\to BaS{{O}_{4}}+2NaCl\]

D)  \[CuS{{O}_{4}}+4N{{H}_{3}}\to [Cu{{(N{{H}_{3}})}_{4}}]S{{O}_{4}}\]

E)  \[{{C}_{12}}{{H}_{22}}{{O}_{11}}+{{H}_{2}}O\to {{C}_{6}}{{H}_{12}}{{O}_{6}}+{{C}_{6}}{{H}_{12}}{{O}_{6}}\]

Correct Answer: A

Solution :

                In redox reaction, oxidation and reduction occurs simultaneously in a reaction.