Which of the following statements are wrong:

The emf of the cell is the sum of oxidation potentials of two half cells.

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An element with higher oxidation potential is a stronger oxidising agent.

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The emf of the cell may increase or decrease with increase of temperature .

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The absolute value of electrode potential cannot be measured

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Solution

The correct options are
A The emf of the cell is the sum of oxidation potentials of two half cells.
B An element with higher oxidation potential is a stronger oxidising agent.
The emf of cell is the sum of the oxidation potential of anode and reduction potential of cathode.
Higher oxidation potential means higher tendency to loose electrons. Hence it is a stronger reducing agent and weaker oxidizing agent.

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Similar questions

(i) EMF of cell = (Oxidation potential of anode) - (Reduction potential of cathode) (ii) EMF of cell = (Oxidation potential of anode) + (Reduction potential of cathode) (iii)) EMF of cell = (Reductional potential of anode) + (Reduction potential of cathode) (i v)) EMF of cell = (Oxidation potential of anode) - (Oxidation potential of cathode)

{2 A g}^{+} + H_{2} ⟶ 2 A g + {2 H}^{+}

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