1.

A cell reaction is represented as Pt|H_(2)Q,Q,H^(+)||KCl|AgCl|Ag. E_(H_(2)Q|Q)^(@) = +0.4V, E_(Ag^(+)|Ag)^(@)=0.8 V, K_(sp)=10^(-10), then calcualte a four digit number 'abcd' where: (a) K_(eq) of the reaction H_(2)Q + 2AgCl rightarrow 2Ag+2Cl^(-)+2H^(+) + Q=10^(ab) (b) Milli"mole"s of Ag formed if 1 litre of saturated solution of AgCl reacts with excess of hydroquinone (H_(2)Q) = 10^(-cd). If initially negligible AgCl(s) is present.

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ANSWER :2002


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