Electrochemistry questions
1808 published questions with worked solutions.
- The standard e.m.f. of a galvanic cell can be calculated from
- A metal having negative reduction potential, when dipped in the solution of its own ions, has a tendency
- When 1 faraday of electricity is passed through CuSO_4 solution, the number of atoms of Cu formed is
- The number of electrons required to deposit 1 g-atom of Al (at. wt. =27) from a solution of AlCl_3 is
- Whether tin can displace lead from aqueous lead bromide solution?
- In the electrolysis of CuSO_4 , the reaction Cu^ 2+ +2e^- Cu takes place at
- If mercury is used as cathode in the electrolysis of aqueous NaCl solution, the ion discharged at the cathode is
- In which cell does the liquid junction potential need to be eliminated?
- When the same electric current is passed through the solutions of different electrolytes in series, the amounts of the elements...
- The amount of sodium deposited by a 5 ampere current for 10 minutes from fused NaCl is
- The element that is easiest to be reduced (among the following, as the free ion/metal couple) is
- The standard hydrogen electrode is written as
- The reaction taking place at the anode in a dry cell is
- Which metal is most readily corroded in moist air?
- The standard potentials at 25^ for the half-reactions Zn^ 2+ +2e^- Zn , E^ =-0.762 V and Mg^ 2+ +2e^- Mg , E^ =-2.37 V are given....
- A substance that will reduce Ag^+ to Ag but will not reduce Ni^ 2+ to Ni is
- For the cell Zn ,| ,Zn^ 2+ ,|| ,Cu^ 2+ ,| ,Cu , if the concentration of Zn^ 2+ and Cu^ 2+ ions is doubled, the e.m.f. of the cell
- For the reaction Zn (s)+ Fe^ 2+ (aq) Zn^ 2+ (aq)+ Fe (s) at 298 K, the cell potential is measured as E_ cell =0.2905 V when [ Fe^...
- The electrochemical equivalent of silver is 0.0011180 g. When an electric current of 0.5 ampere is passed through an aqueous...
- A depolariser used in dry cell batteries is
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