EMF of a Cell - Practice Questions & MCQ

EMF of a cell in terms of reduction potential of its left and right electrodes is

The standard electrode potentials of four metals A, B, C, and D are - 1.2 V, 0.6 V, 0.85 V, and - 0.76 V, respectively.  The sequence of deposition of metals on applying potential is :

The values of 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 from +2 to +3 is easiest?

A button cell used in watches functions as following

If half cell potentials are

The cell potential will be:

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

Standard reduction potential of the half reaction are given below

The strongest oxidising and reducing agents respectively are:

Given

Based on the data given above ,strongest oxidising agent will be:

The correct order of values with negative sign for the four successive elements  is