1.

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

Answer»

SOLUTION :Correct R. Acidified `K_(2)Cr_(2)O_(7)`solution oxidizes alcohol and itselfis reduce to `Cr_(2)(SO_(4))_(3)` which is GREEN in colour.


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