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Three experiments to investigate the rea...

Three experiments to investigate the reactivities of three metals are shown as:

What is the correct order of reactivity (most reactive`to`least reactive) for these three metals ?

A

Chromium, Manganese, Nickel

B

Manganese, Chromium, Nickel

C

Manganese, Nickel, Chromium

D

Nickel, Chromium, Manganese

Text Solution

Verified by Experts

The correct Answer is:
B
In beaker I, chromium is more reactive than nickel so, it displaces nickel from aqueous solution of nickel sulphate.
In beaker II, maganese is more reactive than nickel so, it displaces nickel from aqueous solution of nickel sulphate. In beaker III, chromium is less reactive than manganese so, it does not displace manganese from aqueous solution of manganese sulphate. hence, correct order of reactivity is `Mg gt Cr gt Ni`.
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