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18 Questions around this concept.
Given below are the half reactions with their standard reduction potential at a temperature of . Compare those and select the correct option representing the decreasing order of reducing strength.
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Characteristics of Electrochemical Series
Metals with greater negative Eo (reduction) are strongly electropositive and have more reactivity. It means a lower placed element or metal is in the given series is less reactive is replaced by upper placed or higher element while higher element can be coated by lower metal.
Here Cu is replaced by Zn due to more oxidation potential or reactivity of Zn, while Zn is coated by Cu. Zn- Cu couple is also coated by Cu. Here, the solution turns from blue to colorless and the rod becomes Reddish-brown from Gray white.
Here solution becomes colorless to blue and the rod becomes reddish-brown to white.
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