An iron nail is to be electroplated with nickel using a nickel plate to prevent it from rusting. The electrolyte used for this purpose is nickel sulphate. Based on the above information, answer the following questions.

Which of the following gets oxidised at the anode?

[1 mark]

S {O_{4}}_{4}^{2 -}^{2 -}

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O H^{-}

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H^{+}

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Solution

The correct option is D Ni
Among the given options, $H^{+}$ ion cannot get further oxidised. ${S O}_{4}^{2 -}$ and ${O H}^{-}$ ions migrate towards the anode but they would not be discharged. Instead, the nickel anode will be oxidised by losing two electrons to produce ${N i}^{2 +}$ ions that would enter the solution.

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An iron nail is to be electroplated with nickel using a nickel plate to prevent it from rusting. The electrolyte used for this purpose is nickel sulphate. Based on the above information, answer the following questions. Which of the following gets oxidised at the anode? [1 mark]

The correct option is D NiAmong the given options, H+ ion cannot get further oxidised. SO2−4 and OH− ions migrate towards the anode but they would not be discharged. Instead, the nickel anode will be oxidised by losing two electrons to produce Ni2+ ions that would enter the solution.

An iron nail is to be electroplated with nickel using a nickel plate to prevent it from rusting. The electrolyte used for this purpose is nickel sulphate. Based on the above information, answer the following questions.

Which of the following gets oxidised at the anode?

[1 mark]