Question

$X$ is a metal that can displace $Y$ and $Z$ from their salt solutions. $Y$ can displace $Z$ but not $W$. $W$ can displace both $Y$ and $Z$ but not $X$. What is the correct reactivity order of $X,Y,Z$ and $W$?

• A. $W>X>Y>Z$
• B. $X>Y>Z>W$
• C. $X>W>Y>Z$
• D. $X>W>Z>Y$

Answer 1

The correct option is C $X>W>Y>Z$

Metals on top of the activity series can displace metals at the bottom and they are highly reactive as compared to metals at the bottom of the series.

According to the given formation-

$X>Y,X>Z,Y>Z$

$\Rightarrow X>Y>Z$

Again,

$W>Y>Z;X>W$

Hence, the order is $X>W>Y>Z$.