Class 12 Exam > Class 12 Questions > The Eo M3+/M2+values for Cr, Mn, Fe and Co ar...
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The Eo M3+/M2+ values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0.77 V and m /m 1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?
- a)Cr
- b)Mn
- c)Fe
- d)Co
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The Eo M3+/M2+values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0....
Mn3+ + e- → Mn2+ + 1.57 V
Fe3+ + e- → Fe2+ + 0.77 V
Co3+ + e- → Co2+ + 1.97
Cr3+/Cr2+ with most negative E°red is the best reducing agent.
Cr2+→ Cr3+ + e- , E° = 0.41 V
Thus, is oxidised from Cr2+ to Cr3+ most easily.
Cr2+→ Cr3+ + e- , E° = 0.41 V
Thus, is oxidised from Cr2+ to Cr3+ most easily.
Most Upvoted Answer
The Eo M3+/M2+values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0....
Understanding Standard Reduction Potentials
The standard reduction potentials (Eo) provide insight into the relative ease of reduction reactions for various metals. The more positive the Eo value, the greater the tendency for the metal to be reduced.
Given Eo Values
- Cr: -0.41 V
- Mn: +1.57 V
- Fe: +0.77 V
- Co: +1.97 V
Oxidation State Changes
When examining the ease of oxidation state changes from +2 to +3 for these metals, we analyze the potential for reduction of their +3 oxidation states back to +2.
Analysis of Each Metal
- Chromium (Cr):
- Eo for Cr(+3) to Cr(+2) is -0.41 V.
- Due to its negative value, this indicates that reducing Cr(+3) to Cr(+2) is not favorable, but it suggests that the +3 state is less stable compared to its +2 state.
- Manganese (Mn):
- Eo for Mn(+3) to Mn(+2) is +1.57 V.
- The high positive value indicates a strong tendency to remain in the +2 state.
- Iron (Fe):
- Eo for Fe(+3) to Fe(+2) is +0.77 V.
- This suggests that while Fe can be reduced, it is not as favorable as for Mn.
- Cobalt (Co):
- Eo for Co(+3) to Co(+2) is +1.97 V.
- This indicates a strong preference for Co to remain in the +2 state.
Conclusion
Among these metals, Chromium has the least favorable reduction potential, indicating that the +2 to +3 oxidation state transition is the easiest. Thus, the correct answer is option 'A' (Cr). This means that Chromium readily forms its +3 oxidation state compared to the others.
The standard reduction potentials (Eo) provide insight into the relative ease of reduction reactions for various metals. The more positive the Eo value, the greater the tendency for the metal to be reduced.
Given Eo Values
- Cr: -0.41 V
- Mn: +1.57 V
- Fe: +0.77 V
- Co: +1.97 V
Oxidation State Changes
When examining the ease of oxidation state changes from +2 to +3 for these metals, we analyze the potential for reduction of their +3 oxidation states back to +2.
Analysis of Each Metal
- Chromium (Cr):
- Eo for Cr(+3) to Cr(+2) is -0.41 V.
- Due to its negative value, this indicates that reducing Cr(+3) to Cr(+2) is not favorable, but it suggests that the +3 state is less stable compared to its +2 state.
- Manganese (Mn):
- Eo for Mn(+3) to Mn(+2) is +1.57 V.
- The high positive value indicates a strong tendency to remain in the +2 state.
- Iron (Fe):
- Eo for Fe(+3) to Fe(+2) is +0.77 V.
- This suggests that while Fe can be reduced, it is not as favorable as for Mn.
- Cobalt (Co):
- Eo for Co(+3) to Co(+2) is +1.97 V.
- This indicates a strong preference for Co to remain in the +2 state.
Conclusion
Among these metals, Chromium has the least favorable reduction potential, indicating that the +2 to +3 oxidation state transition is the easiest. Thus, the correct answer is option 'A' (Cr). This means that Chromium readily forms its +3 oxidation state compared to the others.
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The Eo M3+/M2+values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0.77 V and m /m 1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?a)Crb)Mnc)Fed)CoCorrect answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about The Eo M3+/M2+values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0.77 V and m /m 1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?a)Crb)Mnc)Fed)CoCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The Eo M3+/M2+values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0.77 V and m /m 1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?a)Crb)Mnc)Fed)CoCorrect answer is option 'A'. Can you explain this answer?.
The Eo M3+/M2+values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0.77 V and m /m 1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?a)Crb)Mnc)Fed)CoCorrect answer is option 'A'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about The Eo M3+/M2+values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0.77 V and m /m 1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?a)Crb)Mnc)Fed)CoCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The Eo M3+/M2+values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0.77 V and m /m 1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?a)Crb)Mnc)Fed)CoCorrect answer is option 'A'. Can you explain this answer?.
Solutions for The Eo M3+/M2+values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0.77 V and m /m 1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?a)Crb)Mnc)Fed)CoCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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The Eo M3+/M2+values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0.77 V and m /m 1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?a)Crb)Mnc)Fed)CoCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for The Eo M3+/M2+values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0.77 V and m /m 1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?a)Crb)Mnc)Fed)CoCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of The Eo M3+/M2+values for Cr, Mn, Fe and Co are - 0.41 V, +1,57 V, + 0.77 V and m /m 1.97 V respectively. For which one of these metals the change in oxidation state from +2 to +3 is easiest?a)Crb)Mnc)Fed)CoCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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