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