Question

A ‘breath test’ used by traffic police to check drunken driving uses ____?
A) Turmeric on filter paper
B) Silica gel coated with silver nitrate
C) potassium permanganate-sulphuric acid
D) Potassium dichromatic-sulphuric acid

Answer 1

Correct option for this question is

(d) potassium dichromatic sulphuric acid

Answer 2

Answer:

Correct answer is option (D) Potassium dichromate-sulphuric acid

Explanation:

Potassium dichromate-sulphuric acid is used in Breath Analyzers.

When the drunken driver of the vehicle breathes out near the analyzer, the alcohol (ethanol) is oxidized by potassium dichromate and it forms acetic acid.

There is color change in the process, by which the result can be seen if the person has drunk or not.