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CBSE Class 12 Chemistry - Most Important Numericals | Physical Chemistry - Part 1| CBSE Boards 2020

(a) Which metal in the first transition series (3d series) exhibits +1 oxidation state most frequently and why? (b) Which of the following cations are coloured in aqueous solutions and why? Sc^(3+),V^(3+),Ti^(4+),Mn^(2+)(At. "no".Sc=21,V=23,Ti=22,Mn=25)

Redox reactions play a pivotal role in chemistry and biology. The values of standard redox potential (E^(@)) of two half-cell reactions decide which way the reaction is expected to proceed. A simple example is a Daniel cell in which zinc goes into solution and copper gets deposited. E^(@)(SRP) of different half cells are given below: E_(Cu^(2+)|Cu)^(@)=0.34V, E_(Zn^(2+)|Zn)^(@)=-0.76V E_(Ag^(+)|Ag=0.8V, E_(Mg^(2+)|Mg))=-2.37V In which cell, DeltaG^(@) per "mole" of electron is most negative?