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Electrochemistry

Short Answer Type

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41. Predict the products of electrolysis of a dilute aqueous solution of sulphuric acid with inert electrodes.

Answer:
The electrolysis of an aqueous solution of sodium sulphate using inert electrodes produces hydrogen at the cathode and oxygen at the anode and a neutral solution of sodium sulphate remains unaltered by the electrolysis.
At the cathode:
2H⁺ + 2e^– → H₂At the anode:
2H₂O → O₂ + 4H⁺ + 4e^–

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42. Write the electrode reaction taking place during the use of a dry cell.

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43. How is the unit of molar conductivity arrived at?

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44. Write an expression to relate molar conductivity of an electrolyte to its degree of dissociation?

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45. Why is it not possible to measure the voltage of an isolated reduction half reaction?

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46. Arrange the following metals in the order in which they displace each other?
Al, Cu, Fe, Mg, Zn

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47. What is the basis of obtaining electrical energy in fuel cell?

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48. Name a metal that can be used in the cathode protection of iron. Is it more active or less active than iron?

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49. What is the standard electrode potential of NHE?

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50. What is the EMF of the cell when the cell reaction attains equilibrium?

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