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ICSE Class 10 Electrolysis — practice questions

Explore 61 free Electrolysis questions in ICSE Class 10 Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Electrolysis questions and exercises with answers

Showing questions 1–30 of 61.

Order what happens during electrolysisRead the answer and worked solution →What does electrolysis use to drive a chemical reaction?Read the answer and worked solution →Which electrodes are used for acidified-water electrolysis?Read the answer and worked solution →Which set lists the main parts of an electrolytic system?Read the answer and worked solution →Which metal most readily forms positive ions in the activity series?Read the answer and worked solution →Why are solid ionic salts not electrolysed before melting or dissolving?Read the answer and worked solution →Which material can serve as an electrode in molten PbBr2 electrolysis?Read the answer and worked solution →Positive ions migrate toward which electrode?Read the answer and worked solution →Which direction does an anion move in an electrolytic cell?Read the answer and worked solution →Which sign is assigned to the electron-providing cathode?Read the answer and worked solution →Electrons are extracted at which charged electrode?Read the answer and worked solution →Cations gain electrons at which electrode?Read the answer and worked solution →Which listed metal is least likely to form positive ions?Read the answer and worked solution →Which solution factor can affect selective discharge of competing ions?Read the answer and worked solution →At equal concentrations in aqueous solution, which ion is discharged first: Na+, Mg2+, Fe2+, or Cu2+?Read the answer and worked solution →Which half-reaction shows copper ions being reduced during plating?Read the answer and worked solution →Which ions are present in molten lead(II) bromide?Read the answer and worked solution →What must happen to lead(II) bromide before electrolysis?Read the answer and worked solution →Select the reduction equation for Pb2+ in molten lead bromide.Read the answer and worked solution →At the positive electrode, how do bromide ions form bromine?Read the answer and worked solution →Which gas-volume ratio comes from acidified-water electrolysis?Read the answer and worked solution →What is the cathode reaction when acidified water releases hydrogen?Read the answer and worked solution →Which oxidation equation releases oxygen during water electrolysis?Read the answer and worked solution →Why is dilute acid added to water for electrolysis?Read the answer and worked solution →Which solid coats the platinum cathode immersed in CuSO4 solution?Read the answer and worked solution →What gas forms at a platinum anode in aqueous CuSO4?Read the answer and worked solution →Why is water discharged instead of sulfate at the Pt anode?Read the answer and worked solution →What reduction equation deposits copper during electrorefining?Read the answer and worked solution →What happens to a copper anode in CuSO4 electrolysis?Read the answer and worked solution →Why does CuSO4 remain blue with copper electrodes?Read the answer and worked solution →

Worked practice questions

Order what happens during electrolysis

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Steps
  1. Pass direct current through the electrolyte
  2. Cations move to cathode (−)
  3. Anions move to anode (+)
  4. Hydrogen liberated at cathode
  5. Oxygen liberated at anode
  6. Volume of hydrogen is double that of oxygen
Instructions
Tap the stages in order, from the current going in to the gases coming off.

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What does electrolysis use to drive a chemical reaction?

  1. Sound waves
  2. Direct current
  3. Infrared light
  4. Magnetic fields
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Correct answer: B. Direct current

Electrolysis uses direct current to drive a chemical reaction.

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Which electrodes are used for acidified-water electrolysis?

  1. Zinc electrodes
  2. Copper electrodes
  3. Platinum electrodes
  4. Iron electrodes
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Correct answer: C. Platinum electrodes

The prescribed acidified-water setup uses platinum electrodes.

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