Question

A less reactive metal replaces a more reactive metal from its salt solution in water.
A. True
B. False

Answer 1

Hint: We will solve this question by considering the reactivity of the electrochemical series. We can see here that this is about one metal replacing another metal, and therefore it is a displacement reaction.

Complete Solution:
> The reactivity series of metals is also called an activity series. It is basically an arrangement of metals in the descending order of their reactivity.

> We know that the data provided by the reactivity series can be used to predict whether a metal is able to displace another metal in a single displacement reaction.
> We can see that in the reactivity series, the metals that are present on the top are very reactive and these can displace the metals that are present at the bottom of the series. It is found that a metal that is placed at a higher position in the reactivity series can displace the metal present at a lower position from the solution of its salt.
> Let’s see an example of Iron which is more reactive than that of copper, displaces copper from copper sulphate solution to form iron sulphate solution.
\[2Fe+3CuS{{O}_{4}}\to F{{e}_{2}}{{\left( S{{O}_{4}} \right)}_{3}}+3Cu\]

> Therefore, we can conclude that the correct option is, (B) that the given statement “A less reactive metal replaces a more reactive metal from its salt solution in water” is false.

So, the correct answer is “Option B”.

Note: - We must note here that the displacement reaction which is a chemical reaction in which more reactive metal displaces a less reactive element from its compound, is not just limited to metals. Non-metals also take part in these reactions as well.