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Electrochemical Series

As we descend...

Question

As we descend the electrochemical series containing cations, the tendency of the cations to get reduced at the cathode increases.

A

True

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B

False

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Solution

The correct option is A True
As we descend the electrochemical series containing cations, reduction potential increases and tendency to get reduced is increases so the tendency of the cations to get reduced at the cathode increases.

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Q. (i) Explain, why copper, though a good conductor of electricity, is a non-electrolyte.
(ii) Name the gas released at the cathode when acidulated water is electrolysed.
(iii) Explain, why solid sodium chloride does not allow electricity to pass through?
(iv) Fill in the blanks:
(a) As we descend the electrochemical series containing cations, the tendency of the cations to get _________ (oxidized/reduced) at the cathode increases.
(b) The (higher/lower) __________ the concentration of an ion in a solution, the greater is the probability of its being discharged at its appropriate electrode.

Q. Assertion: Cations having more negative potential than -0.828 V are reduced in preference to water.
Reason: Species with higher tendency to get reduced will be discharged first.

Q. Three moles of electrons are passed through three solutions containing

C u S O_{4}

A g N O_{3}

A u C l_{3}

respectively. The ratio of moles of cations reduced at cathode will be :

Q. Three moles of electrons are passed through three solutions in succession containing

{A g N O}_{3}, {C u S O}_{4} a n d {A u C l}_{3}

respectively. The molar ratio of amounts of cations reduced at cathode will be :

Q. Three mole of electrons are passed through three solutions in succession containing

A g N O_{3}, C u S O_{4}

A u C l_{3}

respectively. The ratio of amounts of cations reduced at cathode will be___________.

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