Electrochemistry — Important Questions
Kerala Board · Class 10 · Chemistry
43 important questions from Electrochemistry for Kerala Board Class 10 Chemistry, with answers. Written for the board exams 2027.
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Important Questions from Electrochemistry
Which of the following are functions of a salt bridge in a galvanic cell?
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Maintains electrical neutrality, Prevents mixing of solutions, Completes the internal circuit
A salt bridge maintains electrical neutrality, prevents solution mixing, and completes the internal circuit. It does not generate electricity or act as an electrode.
In the electrolysis of water, hydrogen gas is produced at the cathode.
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True
During electrolysis of water, hydrogen gas is produced at the cathode through reduction: 2H₂O + 2e⁻ → H₂ + 2OH⁻
Which of the following metals can displace hydrogen from dilute acids?
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Magnesium, Zinc, Iron
Metals above hydrogen in the reactivity series (like Mg, Zn, Fe) can displace hydrogen from dilute acids. Copper and silver are below hydrogen.
Primary cells can be recharged and used again.
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False
Primary cells cannot be recharged once their chemical energy is used up. Secondary cells can be recharged and reused.
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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