Which of the statement is correct for the given reactions :

$C u S O 4 + F e → F e S O 4 + C u F e S O 4 + Z n → Z n S O 4 + F e$

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is most reactive and

C u

is least reactive

C u

is most reactive,

is least reactive

Z n

is most reactive,

is least reactive

Z n

is most reactive and

C u

is least reactive

answer is C.

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Detailed Solution

Concept: Reactivity series is a group of metals arranged from highest to lowest reactivity. As a result, the term "metal reactivity series" refers to a group of metals arranged in ascending order of reactivity. It also goes by the name "activity series." Metals' reactivity is caused by either their electronic structure or by the incompleteness of their outer orbitals. As they tend to lose electrons, metals produce positively charged ions.
Metals which can displace other metals from their solution are comparatively more reactive than the metal present in the solution and they lie higher in the reactivity series.
As we can see in the above reactions, Fe can displace Cu and Zn can replace Fe, so we can infer that Fe is more reactive than Cu and Zn is more reactive than Fe. The reactivity order would be Cu< Fe< Zn. Thus, it can be said that Zn is the most reactive out of the three and Cu is the least reactive one.
Hence, the correct answer is option 3

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