Physics GK 21 - Electrochemical Cell

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1).
What is the equivalent EMF of a series combination of n cells?
2).
What is the equivalent internal resistance of a series combination of n cells?
3).
What do we call the resistance offered by the electrolyte and electrodes when the current flows?
4).
Which of these are electrochemical cells?
5).
What do we call a cell that induces a spontaneous redox reaction to create a flow of electrical charges?
6).
Which of the following cells is the basis of Non-rechargeable batteries?
7).
What do we call the cell that requires an outside electrical source to drive the non-spontaneous redox reaction?
8).
What kind of cell is the mobile phone battery when it is being charged?
9).
Which of the following is correct NOT correct about inert electrodes?
10).
Which of the following metals are commonly used as inert electrodes?
11).
What do we call the electrode that can be oxidized or reduced in half reaction?
12).
What is the device used to measure the cell potential?
13).
What is the role of Salt bridge?
14).
What do we call the cell that converts the potential energy from a fuel into electricity?
15).
Which of these is NOT a product of a fuel cell?
16).
What do we call a device which generates electric energy using chemical energy?
17).
Which of the following is correct about EMF of a cell?
18).
What is the substance known as where free ions are present in a cell?
19).
What is the direction of current through electrolyte in a galvanic cell?
20).
What is the direction of current through external circuit in a galvanic 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
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
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
4. Which of these are electrochemical cells?
[A] Galvanic cells
[B] Electrolytic cells
[C] Both a and b
[D] None of the above
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
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
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
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
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
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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