Physics GK 21 - Electrochemical Cell

1. What is the equivalent EMF of a series combination of n cells?
[A] the arithmetic mean of their EMFs
[B] the product of their individual EMF
[C] the sum of their individual EMF
[D] None of the above

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2. What is the equivalent internal resistance of a series combination of n cells?
[A] the arithmetic mean of their internal resistance
[B] the product of their individual internal resistance
[C] the sum of their individual internal resistance
[D] the sum of the reciprocal of their individual internal resistance

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3. What do we call the resistance offered by the electrolyte and electrodes when the current flows?
[A] External resistance
[B] Internal resistance
[C] Electrolytic power
[D] Electrode Potential

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4. Which of these are electrochemical cells?
[A] Galvanic cells
[B] Electrolytic cells
[C] Both a and b
[D] None of the above

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5. What do we call a cell that induces a spontaneous redox reaction to create a flow of electrical charges?
[A] Voltaic cell
[B] Electrolytic cell
[C] Such cells don’t exist
[D] None of the above

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6. Which of the following cells is the basis of Non-rechargeable batteries?
[A] Galvanic cells
[B] Electrolytic cells
[C] Both a and b
[D] None of the above

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7. What do we call the cell that requires an outside electrical source to drive the non-spontaneous redox reaction?
[A] Voltaic cell
[B] Electrolytic cell
[C] Galvanic cell
[D] None of the above

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8. What kind of cell is the mobile phone battery when it is being charged?
[A] Galvanic cell
[B] Fuel cell
[C] Electrolytic cell
[D] None of the above

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9. Which of the following is correct NOT correct about inert electrodes?
[A] They serve as source of electrons
[B] They take part in the chemical reaction
[C] Both a and b
[D] None of the above

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10. Which of the following metals are commonly used as inert electrodes?
[A] Platinum
[B] Carbon
[C] Mercury
[D] All of the above

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