In electroplating of copper on an iron spoon, the electrolyte used is: MCQ with Answer and Explanation

In electroplating of copper on an iron spoon, the electrolyte used is:
A. Sulfuric acid
B. Copper sulfate solution
C. Sodium chloride solution
D. Iron sulfate
Answer: Option B
Solution (By JKSSB Mock Tests)
Acidified copper sulfate (CuSO₄) solution is the electrolyte. The iron spoon is the cathode, and a pure copper plate is the anode. Cu²⁺ ions are reduced at the cathode and deposited on the spoon. Fe from spoon does not go into solution because it is cathode.

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Caustic soda is produced along with chlorine and hydrogen by electrolysis of:
A. NaOH solution
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Correct Answer: Option B


Explanation:
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Assertion (A): Micelle formation occurs when soap is dissolved in water. Reason (R): The hydrophobic tails of soap molecules cluster together to avoid water, while the hydrophilic heads face outward.
A. A is false but R is true.
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Correct Answer: Option C


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