Types of Cells: Primary and Secondary
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Questions and Answers

What is the primary characteristic of a primary cell?

  • Stores energy for later use
  • Does not generate current internally (correct)
  • Supplies direct current from an external source
  • Generates current internally
  • What is the major function of a secondary cell?

  • Stores energy for later use (correct)
  • Charging current converted into chemical energy
  • Supplies direct current from an external source
  • Generates current internally
  • In a Bichromate Cell, what acts as the positive electrode?

  • Dilute H2SO4
  • Zinc plate
  • Carbon plate (correct)
  • K2Cr2O7
  • What is added to dilute H2SO4 in a Bichromate Cell to avoid polarization?

    <p>Crystals of K2Cr2O7</p> Signup and view all the answers

    What does the green color of the liquid in a Bichromate Cell signify?

    <p>Formation of chromic sulphate</p> Signup and view all the answers

    When is a Bichromate Cell useful?

    <p>When strong current is needed for a short time</p> Signup and view all the answers

    What is the example of a primary cell given in the text?

    <p>The Dry Cell</p> Signup and view all the answers

    What is used as the anode in the Dry Cell?

    <p>Zinc (Zn) container</p> Signup and view all the answers

    What acts as the depolarizer in the Dry Cell?

    <p>MnO2 and carbon</p> Signup and view all the answers

    What is the disadvantage of the Dry Cell mentioned in the text?

    <p>Voltage drops rapidly when current is drawn</p> Signup and view all the answers

    What does the Mercury Cell consist of as the cathode?

    <p>HgO and carbon</p> Signup and view all the answers

    What is used as the electrolyte in the Mercury Cell?

    <p>KOH &amp; ZnO paste</p> Signup and view all the answers

    What does the Daniel Cell consist of, dipped in a solution?

    <p>CuSO4</p> Signup and view all the answers

    What forms a complex with Zn2+ in the reaction in the Dry Cell?

    <p>[Zn (NH3)4]2+</p> Signup and view all the answers

    What is used to prevent diffusion but allow the passage of ions in the Daniel Cell?

    <p>{Porous pot}</p> Signup and view all the answers

    What potential does the Daniel Cell have?

    <p>1.1 V</p> Signup and view all the answers

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