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Which of the following concentration cells with produce maximum `E_("cell")` at 298 K [Take `P_(H_2)=1.0` atm in each case.]A. `Pt|H_2(g)|H^(+)(0.01M)||H^(+)(0.1 M) |H_2(g)|Pt`B. `Pt|H_2(g)|NH_4Cl(0.01 M)||HCl (0.1 M) |H_2(g)|Pt`C. `Pt|H_2(g)|H^(+)(0.1 M)||H^(+) (0.2 M) |H_2(g) | Pt`D. `Pt|H_2(g)|H^(+)(pH=0.0)||H^(+)(pH=0.0)|H_2(g)|Pt` |
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Answer» Correct Answer - B Since `(H^+)` given by `NH_4Cl` will be less than 0.01 M so cell emf will be more . `E_("cell")` increases as concentration of cathodic compartment increases. |
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