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The diagram below is a cross-section of a dry cell. Study it and answer the questions that follow.
(a) One the diagram, show with a (+) sign the positive terminal.
(b) (i) Write the equation for the reaction in which electrons are produced.
(ii) The zinc can is lined with ammonium chloride and zinc chloride paste. What would happen if solid mixture was used. Explain.
(iii) Give one advantage and one disadvantage of dry cells.
(c) The set-up below was used to electrolyze molten lead (II) iodine.
(i)State the observation that was made at the anode during the electrolysis.
Give a reason for your answer.
(ii) A current of 0.5 A was passed for two hours. Calculate the mass of lead that was deposited (pb=207 1F=9,500 C)