Class 12 Exam > Class 12 Questions > One mole of each KMnO4 and K2Cr2O7 can oxidis...
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One mole of each KMnO4 and K2Cr2O7 can oxidise ........... moles of ferrous ion.
- a)5 and 5
- b)5 and 6
- c)6 and 5
- d)6 and 6
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
One mole of each KMnO4 and K2Cr2O7 can oxidise ........... moles of fe...
One equivalent of KMnO4 = One equivalent of K2Cr2O7 = One equivalent of Fe2+ ion or 1/5 moles of KMnO4 = 1/6 moles of K2Cr2O7 = One mole of Fe2+ ion.
Hence, one mole of KMnO4 reacts with 5 moles of Fe2+ ion and one mole of K2Cr2O7 reacts with 6 moles of Fe2+ ion.
Hence, one mole of KMnO4 reacts with 5 moles of Fe2+ ion and one mole of K2Cr2O7 reacts with 6 moles of Fe2+ ion.
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One mole of each KMnO4 and K2Cr2O7 can oxidise ........... moles of fe...
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One mole of each KMnO4 and K2Cr2O7 can oxidise ........... moles of fe...
To determine the number of moles of ferrous ion that can be oxidized by one mole of KMnO4 and K2Cr2O7, we need to consider the balanced chemical equations for the oxidation reactions.
1. KMnO4:
The balanced chemical equation for the oxidation of ferrous ion (Fe2+) by KMnO4 in an acidic medium is:
5Fe2+ + MnO4- + 8H+ → 5Fe3+ + Mn2+ + 4H2O
From the balanced equation, we can see that 5 moles of Fe2+ are oxidized by one mole of KMnO4.
2. K2Cr2O7:
The balanced chemical equation for the oxidation of ferrous ion (Fe2+) by K2Cr2O7 in an acidic medium is:
6Fe2+ + Cr2O7^2- + 14H+ → 6Fe3+ + 2Cr3+ + 7H2O
From the balanced equation, we can see that 6 moles of Fe2+ are oxidized by one mole of K2Cr2O7.
Therefore, one mole of KMnO4 can oxidize 5 moles of Fe2+, and one mole of K2Cr2O7 can oxidize 6 moles of Fe2+.
Hence, the correct answer is option B: 5 and 6.
1. KMnO4:
The balanced chemical equation for the oxidation of ferrous ion (Fe2+) by KMnO4 in an acidic medium is:
5Fe2+ + MnO4- + 8H+ → 5Fe3+ + Mn2+ + 4H2O
From the balanced equation, we can see that 5 moles of Fe2+ are oxidized by one mole of KMnO4.
2. K2Cr2O7:
The balanced chemical equation for the oxidation of ferrous ion (Fe2+) by K2Cr2O7 in an acidic medium is:
6Fe2+ + Cr2O7^2- + 14H+ → 6Fe3+ + 2Cr3+ + 7H2O
From the balanced equation, we can see that 6 moles of Fe2+ are oxidized by one mole of K2Cr2O7.
Therefore, one mole of KMnO4 can oxidize 5 moles of Fe2+, and one mole of K2Cr2O7 can oxidize 6 moles of Fe2+.
Hence, the correct answer is option B: 5 and 6.
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One mole of each KMnO4 and K2Cr2O7 can oxidise ........... moles of ferrous ion.a)5 and 5b)5 and 6c)6 and 5d)6 and 6Correct answer is option 'B'. 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 One mole of each KMnO4 and K2Cr2O7 can oxidise ........... moles of ferrous ion.a)5 and 5b)5 and 6c)6 and 5d)6 and 6Correct answer is option 'B'. 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 One mole of each KMnO4 and K2Cr2O7 can oxidise ........... moles of ferrous ion.a)5 and 5b)5 and 6c)6 and 5d)6 and 6Correct answer is option 'B'. Can you explain this answer?.
One mole of each KMnO4 and K2Cr2O7 can oxidise ........... moles of ferrous ion.a)5 and 5b)5 and 6c)6 and 5d)6 and 6Correct answer is option 'B'. 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 One mole of each KMnO4 and K2Cr2O7 can oxidise ........... moles of ferrous ion.a)5 and 5b)5 and 6c)6 and 5d)6 and 6Correct answer is option 'B'. 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 One mole of each KMnO4 and K2Cr2O7 can oxidise ........... moles of ferrous ion.a)5 and 5b)5 and 6c)6 and 5d)6 and 6Correct answer is option 'B'. Can you explain this answer?.
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