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NEET Sample Paper NEET Sample Test Paper-90

  • question_answer
    The chemical reaction, \[2AgCl(s)+{{H}_{2}}(g)\xrightarrow{{}}2HCl(aq)+2Ag(s)\] taking place in a galvanic cell is represented by the notation

    A) \[Pt(s)|{{H}_{2}}(g),\]\[1\,\,bar|1\,M\,KCl(aq)|AgCl(s)|Ag(s)\]

    B) \[Pt(s)|{{H}_{2}}(g),\]\[1\,\,bar|1\,M\,HCl(aq)|1MA{{g}^{+}}(aq)|Ag(s)\]

    C) \[Pt(s)|{{H}_{2}}(g),\]\[1\,\,bar|1\,M\,HCl(aq)|AgCl(s)|Ag(s)\]

    D)  \[Pt(s)|{{H}_{2}}(g),\]\[1\,\,bar|1\,M\,HCl(aq)|Ag(s)|AgCl(s)\]

    Correct Answer: B

    Solution :

    [b] \[2AgCl(s)+{{H}_{2}}(g)\to 2HCl(aq)+2Ag(s)\] The activities of solids and liquids are taken as unity and at low concentrations, the activity of a solute is approximated to its molarity.                                The cell reaction will be \[Pt(s)|{{H}_{2}}(g),1bar|{{H}^{+}}(aq)1M|AgCl(aq)1M|Ag(s)\]


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