Reduction potentials of $A, B, C$ and $D$ are $0.8 V, 0.79 V, 0.34 V$ and $- 2.37 V$ respectively. Which element displaces all the other three elements?

B

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A

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D

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C

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Solution

The correct option is C $D$
The element having lower reduction potential can displace metal having higher reduction potential.
Reduction potential of $A = 0.8 V$
Reduction potential of $B = 0.79 V$
Reduction potential of $C = 0.34 V$
Reduction potential of $D = - 2.37 V$
$∵$ Reduction potential of $D$ is least among given elements.
$∴$ It can displace all other metals.

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Reduction potentials of A, B, C and D are 0.8V,0.79V,0.34V and −2.37V respectively. Which element displaces all the other three elements?

Reduction potentials of $A, B, C$ and $D$ are $0.8 V, 0.79 V, 0.34 V$ and $- 2.37 V$ respectively. Which element displaces all the other three elements?