The unusually high value for Co is because of it's third ionization energy. Just remember that Co has the highest value. If you do it by electronic configuration, you won't get it. So better remember it
@Supreeta_Sen we can explain this by crystal field splitting also right?
Can you explain? I'm not aware of that😅 @Vikrant_Reddy
its just that Co2+ has a higher CFSE value than Co3+.. leading to greater stability of Co2+ than Co3+
Oh okay thanks
But if you are unaware of the answer,then how would you wether to apply CFT or go with electronic configuration?
You get the wrong answer by configuration. Just remember that Co is highest.
But that would just be one case Specifically for +3 to +2 ,in general like it's a mains question with no mention in ncert so I expected it to be something logical