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For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order?
- a)Mn > Fe > Cr > Co [2011]
- b)Fe > Mn > Co > Cr
- c)Co > Mn > Fe > Cr
- d)Cr > Mn > Co > Fe
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
For the four successive transition elements (Cr, Mn, Fe and Co), the s...
More the number of unpaired electrons more will be the stability.
Hence, the correct order is, Mn >Fe >Cr>Co.
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For the four successive transition elements (Cr, Mn, Fe and Co), the s...
B)Fe
c)Co
d)Cr
The correct answer is: d) Cr
The stability of the +2 oxidation state decreases as we move from Cr to Co. This is because the effective nuclear charge experienced by the valence electrons increases as we move from left to right in a period, making it more difficult for the element to lose electrons and form a positive ion. Additionally, the electron configuration of Cr2+ (3d4) is more stable than that of Mn2+ (3d5), Fe2+ (3d6), and Co2+ (3d7) due to half-filled and fully-filled subshells being more stable. Therefore, the stability of the +2 oxidation state follows the order Cr > Mn > Fe > Co.
c)Co
d)Cr
The correct answer is: d) Cr
The stability of the +2 oxidation state decreases as we move from Cr to Co. This is because the effective nuclear charge experienced by the valence electrons increases as we move from left to right in a period, making it more difficult for the element to lose electrons and form a positive ion. Additionally, the electron configuration of Cr2+ (3d4) is more stable than that of Mn2+ (3d5), Fe2+ (3d6), and Co2+ (3d7) due to half-filled and fully-filled subshells being more stable. Therefore, the stability of the +2 oxidation state follows the order Cr > Mn > Fe > Co.
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For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order?a)Mn > Fe > Cr > Co [2011]b)Fe > Mn > Co > Crc)Co > Mn > Fe > Crd)Cr > Mn > Co > FeCorrect answer is option 'A'. Can you explain this answer? for Class 12 2026 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order?a)Mn > Fe > Cr > Co [2011]b)Fe > Mn > Co > Crc)Co > Mn > Fe > Crd)Cr > Mn > Co > FeCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For the four successive transition elements (Cr, Mn, Fe and Co), the stability of +2 oxidation state will be there in which of the following order?a)Mn > Fe > Cr > Co [2011]b)Fe > Mn > Co > Crc)Co > Mn > Fe > Crd)Cr > Mn > Co > FeCorrect answer is option 'A'. Can you explain this answer?.
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