AIEEE 2004 | Electrochemistry Question 172 | Chemistry

The $$E_{{M^{3 + }}/{M^{2 + }}}^o$$ values for Cr, Mn, Fe and Co are – 0.41, +1.57, + 0.77 and +1.97 V respectively. For which one of these metals the change in oxidation state form +2 to +3 is easiest?

AIEEE 2003

MCQ (Single Correct Answer)

-1

For a cell reaction involving a two-electron change, the standard e.m.f. of the cell is found to be 0.295 V at 25^oC. The equilibrium constant of the reaction at 25^oC will be

29.5 $$\times$$ 10^-2

1 $$\times$$ 10¹⁰

1 $$\times$$ 10^-10

AIEEE 2003

MCQ (Single Correct Answer)

-1

Standard reduction electrode potentials of three metals A,B&C are respectively +0.5 V, -3.0 V & -1.2 V. The reducing, powers of these metals are

A > B > C

C > B > A

A > C > B

B > C > A

AIEEE 2003

MCQ (Single Correct Answer)

-1

When during electrolysis of a solution of AgNO₃, 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposited on the cathode will be :

10.8 g

21.6 g

108 g

1.08 g

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