Electrochemistry (Grades 11-12)
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Chemical equivalent = [math]xx[/math] Electro-chemical equivalent
Which of the following equations correctly represents Faraday's first law of electrolysis?
Which of the equations correctly describes the relation between Faraday(F) and Couloumb (C)?
- [math]1 F = 9.65 xx10^4 C[/math][math][/math]
- [math]1 F = 9.64 xx 10^3 C[/math]
- [math]1 F = 9.63 xx 10^2 C[/math]
- [math]1 F = 9.62 xx 10^5 C[/math]
What kind of chemical reactions spontaneously take place in electrochemical cells?
- decomposition reaction
- redox reaction
- synthesis reaction
- displacement reaction
Which of the following redox reactions represents the Daniel Cell?
- [math]Zn(s) + Cu^2+ (aq) rarr Zn^2+(aq) + Cu(s)[/math]
- [math]Cu(s) + 2Ag^+(aq) rarrCu^2+ (aq) + 2Ag(s)[/math]
- [math]2Al(s) + 3Cu^2+ (aq) rarr 2Al^3+(aq) + 3Cu(s)[/math]
- [math]Cu(s) + 2Fe^3+ (aq) rarr Cu^2+ (aq) + 2Fe^2+(aq)[/math]
An electrode may be defined as a metal (rod, plate, or wire) whose potential is affected by the of the ions of the solution, in which it is immersed.
Zinc metal dipped in zinc sulfate solution is an example of
- a metal-metal ion electrode
- a gas electrode
- a metal-sparingly soluble salt electrode
- a redox electrode
In electrochemical cells, electrons are lost at the and gained by the .
In an electrolytic cell, anode has whereas cathode has .
The electrode whose potential is arbitrarily fixed to a certain value (say, 0 V), or whose potential is exactly known, is called a reference electrode.
An electrochemical cell may be defined as a device which is used to convert chemical energy into
Which of the following device is an example of an electrolytic cell?
- Daniell Cell
- Dry Cell
- Galvanic cell
In an electrolytic cell, electrical energy is converted into
- chemical energy
- heat energy
- kinetic energy
- potential energy
The electrode whose potential is arbitrarily fixed to a certain value (say, zero volt) or if it is exactly known is called a reference electrode.