A ‘breath test’ used by traffic police to check drunken driving uses ____?

Question

A &lsquo;breath test&rsquo; used by traffic police to check drunken driving uses ____?

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Potassium dichromatic-sulphuric acid

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Turmeric on filter paper

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Silica gel coated with silver nitrate

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potassium permanganate-sulphuric acid

Q. A ‘breath test’ used by traffic police to check drunken driving uses ____?