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Subject Category > General Knowledge

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

✔ Potassium dichromatic-sulphuric acid

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