Chemistry
Grade-9
Easy
Question
Which of the following is the correct order in which the stability of the +2 oxidation state will exist for the four succeeding transition elements (Cr, Mn, Fe, and Co)?(At nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)
- Cr > Mn > Co > Fe
- Mn > Fe > Cr > Co
- Fe > Mn > Co > Cr
- Co > Mn > Fe > Cr
Hint:
First of all, we need to write the electronic configuration of the given elements. The stability of an oxidation state depends on the electronic configuration of the element before and after attaining the given oxidation state. If the configuration becomes more stable after attaining the given oxidation state, then the oxidation state is stable.
The correct answer is: Mn > Fe > Cr > Co
The correct order of stability is:
Mn > Fe > Cr > Co.
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