111.What is the Nernst equation for the Potential of an electrode? Can Nernst equation be applied to the cell relation ? Apply this equation to a general reaction.
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112.Explain Kohlrausch’s law of independent migration of ions. Mention one application of Kohlrausch’s law.
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Short Answer Type
113.How does molar conductivity vary with concentration for (i) weak electrolyte and for (ii) strong electolyte? Give reasons for these variations.
114.State and explain Faraday's law of electrolysis?
Faraday's first law. The amount of substance produced at an electrode during electrolysis is directly proportional to the quantity of electricity passed through the electrolyte.
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Long Answer Type
115.State and explain Faraday's law of electrolysis?
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116.Show that the electrical work obtainable from a galvanic cell is given by the expression.
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Short Answer Type
117.What are fuel cells? Write the reaction of a oxygen hydrogen fuel cell.
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118.
What is a mercury cell? Give the electrode reactions?
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119.What is the effect of change in (a) concentration, (b) temperature on the electrode potential of a given half-cell?
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120.Iron does not rust even if the zinc coating is broken in a galvanised iron pipe but, rusting occurs much faster if the tin coating over iron is broken. Explain?
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