For the electro chemical cell M|M 2+||X|X 2– If ( ) ( ) 2 0 M /M X/X E 0.46Vand E 0.34V. + − = = Which of the following is correct ? (A) Ecell = –0.80 V (B) M + X → M 2 + X 2– is a spontaneous reactio

Question

For the electro chemical cell M|M 2+||X|X 2– If ( ) ( ) 2 0 M /M X/X E 0.46Vand E 0.34V. + − = = Which of the following is correct ?

(A) Ecell = –0.80 V
(B) M + X → M 2 + X 2– is a spontaneous reaction
(C) M 2+ + X 2– → M + X is a spontaneous reaction
(D) Ecell = 0.80 V

Prashant Kotian · Accepted Answer

Correct answer: C. M | M +2 || X / X 2– 2 o o o cell M/M X/X E E E + − = + = –0.46 + 0.34 = – 0.12V As o cell E is negative so anode becomes cathode and cathode become anode. Spontaneous reaction will be M +2 + X 2– → M + X

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