Assertion :Change in colour of acidic solution of potassium dichromate by breath is used to test drunk drivers. Reason: Change in colour is due to the complexation of alcohol with potassium dichromate.

Both Assertion and Reason are correct and the Reason is the correct explanation of the Assertion

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Both Assertion and Reason are correct but the Reason is not the correct explanation of the Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but the Reason is correct

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Solution

The correct option is C Assertion is correct but Reason is incorrect
Option (C) is correct.
Change in colour of acidic solution of potassium dichromate by breath is used to test drunk drivers. This change in colour is due to the oxidation of alcohol with potassium dichromate to form acetic acid.
During this reaction, the reddish-orange dichromate ion changes color to the green chromium ion when it reacts with the alcohol; the degree of the color change is directly related to the level of alcohol in the exhaled air.

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