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A drunken person was asked to blow a glass tube packed with acidified potassium dichromate. The change in color of the substance from orange to green confirmed the drinking of alcohol. It is due to:
- a)The oxidation of alcohol with the reduction of dichromate to chromium (III)
- b)Complex formation of alcohol and dichromate
- c)Change in coordination number of chromium
- d)The person was left free as no alcohol was detected
Correct answer is option 'A'. Can you explain this answer?
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Introduction:
In this scenario, a glass tube packed with acidified potassium dichromate was used to detect the presence of alcohol in a person's breath. The change in color of the substance from orange to green confirmed the drinking of alcohol. This color change occurs due to the oxidation of alcohol with the reduction of dichromate to chromium (III).
Explanation:
Alcohol is a reducing agent, and it can be oxidized by various oxidizing agents, including acidified potassium dichromate. Acidified potassium dichromate (K2Cr2O7) is an orange-colored compound containing the dichromate ion (Cr2O7^2-).
When alcohol is present in the breath, it reacts with the acidified potassium dichromate in the glass tube. The following reaction takes place:
3CH3CH2OH + K2Cr2O7 + 4H2SO4 → Cr2(SO4)3 + K2SO4 + 3CH3COOH + 7H2O
Key Points:
- The orange dichromate ion (Cr2O7^2-) is reduced to green chromium (III) ions (Cr^3+).
- The alcohol is oxidized to acetic acid (CH3COOH).
- The sulfuric acid (H2SO4) acts as a catalyst in the reaction.
The color change from orange to green is due to the reduction of the dichromate ion to chromium (III) ions. The green color of the chromium (III) ions is responsible for the observed change in color.
Conclusion:
The change in color from orange to green in the glass tube packed with acidified potassium dichromate confirms the presence of alcohol in the breath of the drunken person. This color change occurs due to the oxidation of alcohol with the reduction of dichromate to chromium (III).
Introduction:
In this scenario, a glass tube packed with acidified potassium dichromate was used to detect the presence of alcohol in a person's breath. The change in color of the substance from orange to green confirmed the drinking of alcohol. This color change occurs due to the oxidation of alcohol with the reduction of dichromate to chromium (III).
Explanation:
Alcohol is a reducing agent, and it can be oxidized by various oxidizing agents, including acidified potassium dichromate. Acidified potassium dichromate (K2Cr2O7) is an orange-colored compound containing the dichromate ion (Cr2O7^2-).
When alcohol is present in the breath, it reacts with the acidified potassium dichromate in the glass tube. The following reaction takes place:
3CH3CH2OH + K2Cr2O7 + 4H2SO4 → Cr2(SO4)3 + K2SO4 + 3CH3COOH + 7H2O
Key Points:
- The orange dichromate ion (Cr2O7^2-) is reduced to green chromium (III) ions (Cr^3+).
- The alcohol is oxidized to acetic acid (CH3COOH).
- The sulfuric acid (H2SO4) acts as a catalyst in the reaction.
The color change from orange to green is due to the reduction of the dichromate ion to chromium (III) ions. The green color of the chromium (III) ions is responsible for the observed change in color.
Conclusion:
The change in color from orange to green in the glass tube packed with acidified potassium dichromate confirms the presence of alcohol in the breath of the drunken person. This color change occurs due to the oxidation of alcohol with the reduction of dichromate to chromium (III).
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A drunken person was asked to blow a glass tube packed with acidified potassium dichromate. The change in color of the substance from orange to green confirmed the drinking of alcohol. It is due to:a)The oxidation of alcohol with the reduction of dichromate to chromium (III)b)Complex formation of alcohol and dichromatec)Change in coordination number of chromiumd)The person was left free as no alcohol was detectedCorrect answer is option 'A'. Can you explain this answer?
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A drunken person was asked to blow a glass tube packed with acidified potassium dichromate. The change in color of the substance from orange to green confirmed the drinking of alcohol. It is due to:a)The oxidation of alcohol with the reduction of dichromate to chromium (III)b)Complex formation of alcohol and dichromatec)Change in coordination number of chromiumd)The person was left free as no alcohol was detectedCorrect answer is option 'A'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about A drunken person was asked to blow a glass tube packed with acidified potassium dichromate. The change in color of the substance from orange to green confirmed the drinking of alcohol. It is due to:a)The oxidation of alcohol with the reduction of dichromate to chromium (III)b)Complex formation of alcohol and dichromatec)Change in coordination number of chromiumd)The person was left free as no alcohol was detectedCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A drunken person was asked to blow a glass tube packed with acidified potassium dichromate. The change in color of the substance from orange to green confirmed the drinking of alcohol. It is due to:a)The oxidation of alcohol with the reduction of dichromate to chromium (III)b)Complex formation of alcohol and dichromatec)Change in coordination number of chromiumd)The person was left free as no alcohol was detectedCorrect answer is option 'A'. Can you explain this answer?.
A drunken person was asked to blow a glass tube packed with acidified potassium dichromate. The change in color of the substance from orange to green confirmed the drinking of alcohol. It is due to:a)The oxidation of alcohol with the reduction of dichromate to chromium (III)b)Complex formation of alcohol and dichromatec)Change in coordination number of chromiumd)The person was left free as no alcohol was detectedCorrect answer is option 'A'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about A drunken person was asked to blow a glass tube packed with acidified potassium dichromate. The change in color of the substance from orange to green confirmed the drinking of alcohol. It is due to:a)The oxidation of alcohol with the reduction of dichromate to chromium (III)b)Complex formation of alcohol and dichromatec)Change in coordination number of chromiumd)The person was left free as no alcohol was detectedCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A drunken person was asked to blow a glass tube packed with acidified potassium dichromate. The change in color of the substance from orange to green confirmed the drinking of alcohol. It is due to:a)The oxidation of alcohol with the reduction of dichromate to chromium (III)b)Complex formation of alcohol and dichromatec)Change in coordination number of chromiumd)The person was left free as no alcohol was detectedCorrect answer is option 'A'. Can you explain this answer?.
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A drunken person was asked to blow a glass tube packed with acidified potassium dichromate. The change in color of the substance from orange to green confirmed the drinking of alcohol. It is due to:a)The oxidation of alcohol with the reduction of dichromate to chromium (III)b)Complex formation of alcohol and dichromatec)Change in coordination number of chromiumd)The person was left free as no alcohol was detectedCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for A drunken person was asked to blow a glass tube packed with acidified potassium dichromate. The change in color of the substance from orange to green confirmed the drinking of alcohol. It is due to:a)The oxidation of alcohol with the reduction of dichromate to chromium (III)b)Complex formation of alcohol and dichromatec)Change in coordination number of chromiumd)The person was left free as no alcohol was detectedCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of A drunken person was asked to blow a glass tube packed with acidified potassium dichromate. The change in color of the substance from orange to green confirmed the drinking of alcohol. It is due to:a)The oxidation of alcohol with the reduction of dichromate to chromium (III)b)Complex formation of alcohol and dichromatec)Change in coordination number of chromiumd)The person was left free as no alcohol was detectedCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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