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ICSE Class 10 Electrolysis — practice questions — page 2

Explore 60 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 31–60 of 60.

Which ions must a plating bath contain to coat an object with a metal?Read the answer and worked solution →Where does the coating metal deposit during electroplating?Read the answer and worked solution →Which change replenishes Ni2+ at the nickel anode?Read the answer and worked solution →What chemical change coats the cathode during nickel-sulfate plating?Read the answer and worked solution →Which equation plates silver from argentocyanide?Read the answer and worked solution →Choose the silver-anode oxidation equation.Read the answer and worked solution →Which bath provides the complex ion for silver plating?Read the answer and worked solution →At the positive impure-copper electrode, which equation applies?Read the answer and worked solution →What electrolyte is used in copper electrorefining?Read the answer and worked solution →Which material is used for the cathode in copper electrorefining?Read the answer and worked solution →Where is impure copper connected during electrorefining?Read the answer and worked solution →What happens to silver impurities in copper electrorefining?Read the answer and worked solution →Which solution is prescribed for nickel electroplating?Read the answer and worked solution →What characterises a strong electrolyte in aqueous solution?Read the answer and worked solution →A dissolved substance stays molecular and carries no current. Its class?Read the answer and worked solution →What carries current through the copper wires of an electrolytic circuit?Read the answer and worked solution →Which particles carry current through a liquid electrolyte?Read the answer and worked solution →When do Na+ and Cl− ions appear after NaCl dissolves in water?Read the answer and worked solution →Which substance forms a strong electrolyte when dissolved in water?Read the answer and worked solution →Why must an object be degreased before electroplating?Read the answer and worked solution →Which process can nickel electroplating reduce?Read the answer and worked solution →Why are selected areas covered with wax before electroplating?Read the answer and worked solution →A plating cell has an inert anode. What needs replenishing?Read the answer and worked solution →With Pt electrodes, how does aqueous CuSO4's blue colour change?Read the answer and worked solution →Aqueous CuSO4 uses Pt electrodes. How does its acidity change?Read the answer and worked solution →Cu electrodes transfer Cu/Cu2+ only. Mass changes?Read the answer and worked solution →Match each electrolytic cell term with its definition:Read the answer and worked solution →Match each industrial electrolytic extraction with its electrolyte and components:Read the answer and worked solution →Match each electrochemical electroplating rule with its requirement:Read the answer and worked solution →Match each ion with its preferential discharge order at electrodes:Read the answer and worked solution →

Worked practice questions

Which ions must a plating bath contain to coat an object with a metal?

  1. Neutral gas particles
  2. Only metal anions
  3. Hydrogen atoms only
  4. Cations of coating metal
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Correct answer: D. Cations of coating metal

The plating electrolyte should contain cations of the metal being deposited.

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Where does the coating metal deposit during electroplating?

  1. Positive anode
  2. Negative cathode
  3. Power supply
  4. Salt bridge
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Correct answer: B. Negative cathode

Metal cations gain electrons at the cathode and form the coating.

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Which change replenishes Ni2+ at the nickel anode?

  1. Ni → Ni2+ + 2e−
  2. Ni2+ + 2e− → Ni
  3. 2H2O → O2 + 4H+ + 4e−
  4. 2Cl− → Cl2 + 2e−
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Correct answer: A. Ni → Ni2+ + 2e−

Nickel atoms lose electrons at the anode and enter the bath as Ni2+.

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