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Factors Affecting Electrolysis

Reduction pot...

Question

Reduction potential of four elements P, Q, R, Sis-2.90, 0.34, 1.20 and -0.76 and Reactivitydecreases in the order(a) P>Q>R>S(c)R> Q> S> P(b) Q> P> R>S(d) P>S>a>R

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Q. Reduction potentials of

A, B, C

D

0.8 V, 0.79 V, 0.34 V

- 2.37 V

respectively. Which element displaces all the other three elements?

For elements A, B and C the standard reduction potential are +0.65V , -2.25V and -0.45V respectively. The correct order of their reducing power is:

Two elements A and B have reduction potential 0.34V and 0.25V respectively. Which statement is true regarding these two elements.

Q. A solution containing one mole per litre each of

A X, B X_{2}, C X_{2}

D X_{2}

is electrolysed using inert electrodes. The values of the standard potentials for reduction reactions of

A^{+} | A, B^{2 +} | B, C^{2 +} | C

D^{2 +} | D

+ 0.80, + 0.34, - 0.76

- 1.66

volts respectively.
The correct sequence in which these metals will be deposited on the cathode is:

Q. A cell constructed by coupling a standard copper electrode and a standard magnesium electrode has emf of

2.7

volts. If the standard reduction potential of the copper electrode is

+ 0.34

volt, that of magnesium electrode is:

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Factors Affecting Electrolysis

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