ICSE Class 10 Electrolysis — Mock Test (2027)
Free online mock test for Electrolysis (ICSE Class 10 Chemistry) — 20 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.
What to expect: This mock test covers key concepts from the Electrolysis chapter — including application-based and competency-focused questions aligned with how ICSE actually sets the paper.
Tip: Attempt without notes first to identify gaps, then review explanations for any wrong answers. Retake after a few days for best retention.
Sample questions
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1.What observation is made when copper sulphate solution is electrolysed using copper electrodes?
- A.Oxygen gas is liberated at the anode.
- B.A reddish-pink deposit of copper metal forms on the cathode.
- C.The solution turns colorless as copper ions are depleted.
- D.Hydrogen gas is evolved at the cathode.
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2.(vi) Passing of an electric current through electrolytes results in
- A.Physical change
- B.Chemical change
- C.Both (a) and (b)
- D.None of these
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3.Which of the following correctly describes the key characteristics of electrolysis?
- A.Cations migrate to the anode, anions to the cathode, and products form in the electrolyte solution.
- B.Electrons gained at the cathode equal those lost at the anode, only metals are liberated at both electrodes, and AC causes electrolysis.
- C.Cations migrate to the cathode, anions to the anode; products form at electrode surfaces; only hydrogen and metals are liberated at the cathode; mass of substance produced is proportional to electricity passed (Faraday's Law).
- D.Electrolysis occurs with alternating current, non-metals are liberated at the cathode, and the mass of substance produced is independent of electricity passed.
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4.Which of the following electrolyte is different from others?
- A.Ammonium hydroxide
- B.Magnesium hydroxide
- C.Copper hydroxide
- D.Potassium chloride
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5.Why does the concentration of sulphuric acid increase at the anode during the electrolysis of acidified water?
- A.H⁺ ions are discharged at the anode, leaving excess SO₄²⁻ ions to form H₂SO₄.
- B.Discharge of OH⁻ ions disturbs the ionic equilibrium of water, causing more water to ionise and produce excess H⁺ ions that combine with SO₄²⁻ ions.
- C.SO₄²⁻ ions are directly oxidized at the anode to form H₂SO₄.
- D.Water molecules split at the anode to release H₂SO₄ directly.
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