The emf of the following three galvanic cells. I . Z n / Z n 2 + ( 1 M ) | | C u 2 + ( 1 M ) / C u I I . Z n / Z n 2 + ( 0.1 M ) | | C u 2 + ( 1 M ) / C u I I I . Z n / Z n 2 + ( 1 M ) | | C u 2 + ( 0.1 M ) / C u are represented by E 1 , E

Question

The emf of the following three galvanic cells. I . Z n / Z n 2 + ( 1 M ) | | C u 2 + ( 1 M ) / C u I I . Z n / Z n 2 + ( 0.1 M ) | | C u 2 + ( 1 M ) / C u I I I . Z n / Z n 2 + ( 1 M ) | | C u 2 + ( 0.1 M ) / C u are represented by E 1 , E 2 and E 3 . Which of the following is true

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Correct answer: D. E 2 > E 1 > E 3

E c e l l = E c e l l o - 2.303 R T n F l o g [ Z n 2 + ] [ C u 2 + ] E 1 = E c e l l o - 2.303 R T 2 F l o g 1 1 = E c e l l o E 2 = E c e l l o - 2.303 R T 2 F l o g 0.1 1 = E c e l l o + 2.303 R T 2 F E 2 = E c e l l o - 2.303 R T 2 F l o g 1 0.1 = E c e l l o - 2.303 R T 2 F Hence, E 2 > E 1 > E 3 .

The emf of the following three galvanic cells. I . Z n / Z n 2 + ( 1 M ) | | C u 2 + ( 1 M ) / C u I I . Z n / Z n 2 + ( 0.1 M ) | | C u 2 + ( 1 M ) / C u I I I . Z n / Z n 2 + ( 1 M ) | | C u 2 + ( 0.1 M ) / C u are represented by E 1 , E 2 and E 3 . Which of the following is true

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