Q. A ‘breath test’ used by traffic police to check drunken driving uses ____?
A) Silica gel coated with silver nitrate
B) Turmeric on filter paper
C) Potassium dichromatic-sulphuric acid
D) potassium permanganate-sulphuric acid
✔ Correct Answer: Potassium dichromatic-sulphuric acid
Exam Insight
A breath test for drunken driving uses potassium dichromate in a chemical reaction to detect ethanol vapor in a driver's breath.