Electrochemical cell solutions
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Electrochemical cell basic question
![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
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
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![Electrochemical Cell
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
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Electrochemical cell solutions
- 1. 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 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 Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 2. Electrochemical Cell 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 Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 3. Electrochemical Cell 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 Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 4. Electrochemical Cell 10.Which of the following metals are commonly used as inert electrodes? [A] Platinum [B] Carbon [C] Mercury [D] All of the above 11.What do we call the electrode that can be oxidized or reduced in half reaction? [A] Inert electrode [B] Active electrode [C] Sleeping electrode [D] Passive electrode 12.What is the device used to measure the cell potential? [A] Ammeter [B] Voltmeter [C] Wattmeter [D] None of the above Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 5. Electrochemical Cell 13.What is the role of Salt bridge? [A] allows the ions to flow from one half cell to another [B] prevents the flow of solutions from one half cell to another [C] Both a and b [D] None of the above 14.What do we call the cell that converts the potential energy from a fuel into electricity? [A] Electrolytic cell [B] Galvanic cell [C] Dry cell [D] Fuel cell 15.Which of these is NOT a product of a fuel cell? [A] Water [B] Electricity [C] Heat [D] None of the above Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 6. Electrochemical Cell 16.What do we call a device which generates electric energy using chemical energy? [A] Potentiometer [B] Resistor [C] Cell [D] Metre bridge 17.Which of the following is correct about EMF of a cell? [A] it is the potential difference between the electrodes when current is flowing in the cell [B] it is the drift velocity of the electrons when there is no current in the cell [C] it is the potential difference between the electrodes when there is no current in the cell [D] None of the above 18.What is the substance known as where free ions are present in a cell? [A] Electrodes [B] Electrolyte [C] Coolant [D] None of the above Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com
- 7. Electrochemical Cell 19.What is the direction of current through electrolyte in a galvanic cell? [A] flows from cathode to anode [B] flows from anode to cathode [C] flows in both direction [D] None of the above 20.What is the direction of current through external circuit in a galvanic cell? [A] flows from cathode to anode [B] flows from anode to cathode [C] flows in both direction [D] None of the above Produced with a Trial Version of PDF Annotator - www.PDFAnnotator.com