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Which of the following is a disproportionation reaction?
- a)CaCO3 + 2H+ → Ca2+ + H2O + CO2
- b)2CrO42– + 2H+ → Cr2O72– + H2O
- c)Cr2O72– + 2OH– → 2CrO42– +H2O
- d)Cu2O + 2H+ → Cu + Cu2+ + H2O
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Which of the following is a disproportionation reaction?a)CaCO3 + 2H+ ...
A disproportionation reaction is a reaction in which a single element undergoes reduction and oxidation i.e in option d),in Cu2O, Cu has an oxidation state of +1 and in Cu it has 0 (i.e reduction)
and +1 to +2 (i.e oxidation)
Most Upvoted Answer
Which of the following is a disproportionation reaction?a)CaCO3 + 2H+ ...
A disproportionation reaction is a reaction in which a single element undergoes reduction and oxidation i.e in Cu2O Cu has an oxidation state of +1 and in cu it has 0(i.e reduction)
and +1 to +2(i.e oxidation)
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Which of the following is a disproportionation reaction?a)CaCO3 + 2H+ ...
Disproportionation reaction refers to a type of chemical reaction in which a single substance is simultaneously oxidized and reduced to form two different products. Among the given options, option D: Cu2O + 2H → Cu + Cu2+ + H2O is a perfect example of a disproportionation reaction. Let's break down the reaction and understand it in detail:
Reaction: Cu2O + 2H → Cu + Cu2+ + H2O
**Oxidation process:**
Cu2O loses electrons and gets oxidized to Cu, where the oxidation state of Cu changes from +1 to 0. In this process, Cu2O acts as a reducing agent.
**Reduction process:**
In the presence of H+ ions, Cu2+ ions gain electrons and get reduced to Cu. Here, Cu2+ acts as an oxidizing agent.
Hence, we can conclude that Cu2O is simultaneously oxidized and reduced in this reaction, making it a disproportionation reaction.
Let's summarize the reaction using HTML bullet points:
- Reaction: Cu2O + 2H → Cu + Cu2+ + H2O
- Oxidation: Cu2O (oxidation state: +1) → Cu (oxidation state: 0)
- Reduction: Cu2+ (oxidation state: +2) + 2e- → Cu (oxidation state: 0)
- Disproportionation reaction: Cu2O is simultaneously oxidized and reduced.
It's important to note that the other options (a, b, and c) do not involve a single substance being both oxidized and reduced at the same time. Therefore, option D is the correct answer for the given question.
Reaction: Cu2O + 2H → Cu + Cu2+ + H2O
**Oxidation process:**
Cu2O loses electrons and gets oxidized to Cu, where the oxidation state of Cu changes from +1 to 0. In this process, Cu2O acts as a reducing agent.
**Reduction process:**
In the presence of H+ ions, Cu2+ ions gain electrons and get reduced to Cu. Here, Cu2+ acts as an oxidizing agent.
Hence, we can conclude that Cu2O is simultaneously oxidized and reduced in this reaction, making it a disproportionation reaction.
Let's summarize the reaction using HTML bullet points:
- Reaction: Cu2O + 2H → Cu + Cu2+ + H2O
- Oxidation: Cu2O (oxidation state: +1) → Cu (oxidation state: 0)
- Reduction: Cu2+ (oxidation state: +2) + 2e- → Cu (oxidation state: 0)
- Disproportionation reaction: Cu2O is simultaneously oxidized and reduced.
It's important to note that the other options (a, b, and c) do not involve a single substance being both oxidized and reduced at the same time. Therefore, option D is the correct answer for the given question.
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Which of the following is a disproportionation reaction?a)CaCO3 + 2H+ → Ca2+ + H2O + CO2b)2CrO42– + 2H+ → Cr2O72– + H2Oc)Cr2O72– + 2OH– → 2CrO42– +H2Od)Cu2O + 2H+ → Cu + Cu2+ + H2OCorrect answer is option 'D'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Which of the following is a disproportionation reaction?a)CaCO3 + 2H+ → Ca2+ + H2O + CO2b)2CrO42– + 2H+ → Cr2O72– + H2Oc)Cr2O72– + 2OH– → 2CrO42– +H2Od)Cu2O + 2H+ → Cu + Cu2+ + H2OCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is a disproportionation reaction?a)CaCO3 + 2H+ → Ca2+ + H2O + CO2b)2CrO42– + 2H+ → Cr2O72– + H2Oc)Cr2O72– + 2OH– → 2CrO42– +H2Od)Cu2O + 2H+ → Cu + Cu2+ + H2OCorrect answer is option 'D'. Can you explain this answer?.
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Solutions for Which of the following is a disproportionation reaction?a)CaCO3 + 2H+ → Ca2+ + H2O + CO2b)2CrO42– + 2H+ → Cr2O72– + H2Oc)Cr2O72– + 2OH– → 2CrO42– +H2Od)Cu2O + 2H+ → Cu + Cu2+ + H2OCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Chemistry.
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