InterviewSolution
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InterviewSolution
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Following techinique is adopted to check suspected drunk drivers. Read the passage and answer the questions at the end of it. When suspected drunk drivers are tested with a Breathalyzer, the alcohol (ethanol) in the exhaled breath is oxidized to ethanoic acid with an acidic solution of potassium dichromate : `3CH_(3)underset("Ethanol")(CH_(2)OH)(aq)+2Cr_(2)O_(7)^(2-)+16H^(+)(aq)rarr underset("Ethanoic acid")(3CH_(3)COOH)(aq)+4Cr^(3+)(aq)+11H_(2)O(l)` The Breathalyzer measures the colour change and produces a meter reading calibrated in terms of blood alcohol content. Colour of the testing solution changes from :A. `Cr_(2)O_(7)^(2-)` is red changing to `Cr^(3+)` (green)B. `Cr_(2)O_(7)^(2-)` is orange changing to `Cr^(3+)` (blue)C. `Cr_(2)O_(7)^(2-)` is orange changing to `Cr^(3+)` (green)D. `Cr_(2)O_(7)^(2-)` is blue changing to `Cr^(3+)` (yellow) |
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Answer» Correct Answer - C `Cr_(2)O_(7)^(2-)` is orange changing to `Cr^(3+)` (green) |
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