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ChemistryJEE Main 23 Jan 2026, Shift 2·Q3·MCQ·Easy–moderate

Electrochemistry · Concentration cell nernst equation

Consider the above electrochemical cell where a metal electrode (M) is undergoing redox reaction by forming MX+\ce{M+} (M→MX++e\ce{M -> M+ + e}). The cation MX+\ce{M+} is present in two different concentrations c1\mathrm{c_1} and c2\mathrm{c_2} as shown above. Which of the following statement is correct for generating a positive cell potential?
  1. (1)If c1\mathrm{c_1} is present at anode, then c1=c2\mathrm{c_1 = c_2}
  2. (2)If c1\mathrm{c_1} is present at cathode, then c1<c2\mathrm{c_1 < c_2}
  3. (3)If c1\mathrm{c_1} is present at cathode, then c1>c2\mathrm{c_1 > c_2}
  4. (4)If c1\mathrm{c_1} is present at anode, then c1>c2\mathrm{c_1 > c_2}

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See the full 23 Jan 2026, Shift 2 paper