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a ‘breath test’ used by traffic police to check drunken driving uses
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Q.
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 perma-nganate-sulphuric acid
[D] potassium dichromate-sulphuric acid
Answer & Explanation
Option: [D]
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