Question

Which of the following combination of reagents does not undergo redox reaction in aqueous medium?

• A. $SnCl_{2}+HgCl_{2}$
• B. $CuSO_{4}+KCN$
• C. $Pb\left(\right.CH_{3}COO\left(\left.\right)_{2}+KI$
• D. $Ag_{2}O+SO_{2}$

Answer 1

Answer: (C)

Here only reaction between Lead acetate and KI is not a redox reaction while rest other are redox reactions
A. $SnCl_{2}+HgCl_{2}\overset{R e d o x}{ \rightarrow }Hg\downarrowSnCl_{4 s}$
B. $CuSO_{4}+KCN \rightarrow K_{2}SO_{4}+Cu\left(CN\right)_{2}\downarrow\overset{S p o n t a n e o u s \left(\right. R . T . \left.\right)}{ \rightarrow }Cu\left(CN\right)\downarrow+\left(CN\right)_{2}\uparrow$
C. $Pb\left(\left(CH\right)_{3} COO\right)_{2}+KI\overset{I o n e x c h a n g e r e a c t i o n}{ \rightarrow }PbI_{2}\downarrow+CH_{3}COOK$
D. $Ag_{2}O+SO_{2}\overset{R e d o x}{ \rightarrow }Ag+SO_{3}\uparrow$