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Electrochemistry (Grades 11-12)

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Chemical equivalent =                 [math]xx[/math] Electro-chemical equivalent
  1. 96500
  2. 91200
  3. 98500
  4. 90400
Which of the following equations correctly represents Faraday's first law of electrolysis?
  1. [math]wpropQ[/math]
  2. [math]w//Q[/math]
  3. [math]w~=Q[/math]
  4. [math]w<=Q[/math]
Which of the equations correctly describes the relation between Faraday(F) and Couloumb (C)?
  1. [math]1 F = 9.65 xx10^4 C[/math][math][/math]
  2. [math]1 F = 9.64 xx 10^3 C[/math]
  3. [math]1 F = 9.63 xx 10^2 C[/math]
  4. [math]1 F = 9.62 xx 10^5 C[/math]
What kind of chemical reactions spontaneously takes place in electrochemical cells?
  1. decomposition reaction
  2. redox reaction
  3. synthesis reaction
  4. displacement reaction
Which of the following redox reactions represents the Daniel Cell?
  1. [math]Zn(s) + Cu^2+ (aq) rarr Zn^2+(aq) + Cu(s)[/math]
  2. [math]Cu(s) + 2Ag^+(aq) rarrCu^2+ (aq) + 2Ag(s)[/math]
  3. [math]2Al(s) + 3Cu^2+ (aq) rarr 2Al^3+(aq) + 3Cu(s)[/math]
  4. [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
  1. a metal-metal ion electrode.
  2. a gas electrode.
  3. a metal-sparingly soluble salt electrode.
  4. 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.
  1. True
  2. False
An electrochemical cell may be defined as a device which is used to convert chemical energy into                                         .
Which of the following devices is an example of an electrolytic cell?
  1. Voltmeter
  2. Daniell Cell
  3. Dry Cell
  4. Galvanic cell
In an electrolytic cell, electrical energy is converted into                 energy.
  1. chemical
  2. heat
  3. kinetic
  4. potential
A reference electrode is an electrode with a potential set to or known to be at a specific value, like 0 V.
  1. True
  2. False

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