MCQ
Observe the given figure carefully.
$X$ and $Y$ respectively are:
$X$ and $Y$ respectively are:
- A$Zn$ and $Ag$
- B$Au$ and $Cu$
- C$Fe$ and $Cu$
- ✓$Zn$ and $Cu$
✓
Answer
Correct option: D.
$Zn$ and $Cu$
Zinc is more reactive than copper so, $Zn$ displaces $Cu$ from its blue, $CuSO_4$ solution and forms colourless, $ZnSO_4$ solution.
$\begin{matrix}\text{Zn}&+&\text{CuSO}_4&\rightarrow&\text{ZnSO}_4&+&\text{Cu}\\\text{(X)}&&(\text{Blue})&&\text{(Colourless)}&&\text{(Y)}\end{matrix}$
$\begin{matrix}\text{Zn}&+&\text{CuSO}_4&\rightarrow&\text{ZnSO}_4&+&\text{Cu}\\\text{(X)}&&(\text{Blue})&&\text{(Colourless)}&&\text{(Y)}\end{matrix}$
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