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Electrodes and Electrolyte

What is the o...

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What is the order of discharge of ions?

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Q. (a) Al³⁺, Cu²⁺, Na⁺, Zn²⁺ ions are present in an aqueous solution, such that the concentration of ions is same. write the order of discharge of ions.
(b) Amongst the OH⁻ ions and Br⁻ ions which are likely to discharge first?

Q. In the electrochemical series, ions are arranged in an increasing order of discharge potentials.

N a^{+}

ions are discharged in preference to

H^{+}

ions at Hg cathode. Reason: The nature of the cathode can affect the order of discharge of ions.

Read the above assertion and reason and choose the correct option regarding it.

Q. Selective discharge of ions depends on :

Which of the following statement(s) is/are correct?

I. Selective discharge of ions is independent of the relative position of ions in the activity series.

II. Selective discharge of ions is dependent on nature of electrodes.

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