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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2003

  • question_answer
    A galvanic cell is constructed using the redox reaction,\[\frac{1}{2}{{H}_{2}}(g)+AgCl(s){{H}^{+}}(aq)+C{{l}^{-}}(aq)+Ag(s)\] it is represented as:

    A)  \[Pt|{{H}_{2}}(g)|HCl(sol.n)||AgN{{O}_{3}}(sol.n)|Ag\]

    B)  \[Ag|AgCl(s)|KCl(sol.n)|HCl(sol.n),{{H}_{2}}(g)Pt\]

    C)  \[Pt|{{H}_{2}}(g)|KCl(sol.n)||AgCl(s)|Ag\]

    D)  \[Pt|{{H}_{2}}(g),HCl(sol.n)||AgCl(s)|Ag\]

    Correct Answer: D

    Solution :

    The cell reaction is: \[\frac{1}{2}{{H}_{2}}(g)+AgCl(s){{H}^{+}}(aq)\] \[+C{{l}^{-}}(aq)+Ag(s)\] Obviously, here hydrogen is being oxidised and \[AgCl\] is getting reduced. Hence the correct cell representaiton will be: \[Pt|{{H}_{2}}(g),\,HCl(solution)||AgCl(s)|Ag\]


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