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Standard X
Chemistry
Question

If nickel sulphate solution is used as the electrolyte will the bulb glow or not?
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Solution
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The key process of electrolysis is the interchange of atoms and ions by the removal or addition of electrons to the external circuit. Nickel is deposited at the anode and sulfate ions remain in solution forming sulfuric acid while OH ions are released as oxygen gas. The bulb glows when the flow of electrons takes place.

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Q1
If nickel sulphate solution is used as the electrolyte will the bulb glow or not?
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Q2
In the electroplating of iron by nickel, nickel sulphate solution is taken as electrolyte. What is the acid that is added to the electrolyte during the process?
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Q3

Question 20.
In an attempt to demonstrate electrical conductivity through an electrolyte, the following apparatus ( see the figure ) was set up.

Which among the following statement(s) is/ are correct?
(i) Bulb will not glow because electrolyte is not acidic.
(ii) Bulb will glow because NaOH is a strong base and furnishes ions for conduction.
(iii) Bulb will not glow because circuit is incomplete.
(iv) Bulb will not glow because it depends upon the type of electrolytic solution.

(a) (i) and (iii)
(b) (ii) and (iv)
(c) (ii) only
(d) (iv) only


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Q4
A solution of copper sulphate is used as an electrolyte to purify :
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Q5
The bulb in the circuit does not glow when pure water is used as solution. Which of the following can be added to water to make the bulb glow?

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