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Science and Technology - General Knowledge Questions
Which of the following materials is normally used in a breath analyzer test to ascertain whether a person is drunk or not ?
A)
Silica gel
B)
Baking soda
C)
Potassium dichromate crystals
D)
Potassium permanganate powder

Correct Answer :   Potassium dichromate crystals

The Breathalyzer is the oldest breath alcohol analyzer; it is based on the principle of color change of potassium dichromate solution in the presence of alcohol and then analysis using spectroscopy after a specified time to ensure complete reaction.

Published On : June 12, 2021
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