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Standard Electrode Potentials

The metal tha...

Question

The metal that does not displace hydrogen from an acid is

A

Ca

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B

Al

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C

Zn

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D

Hg

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Solution

The correct option is D Hg
In an electrochemical series, all metals above hydrogen in the acitivity series will displace hydrogen form an acid .
Here, Ca, Al and Zn are placed above hydrogen hence these metals can displace hydrogen , whereas , Hg placed below the hydrogen. So, it does not displace hydrogen from an acid.

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