R

Ram Sharma • 193.84K Points
Coach General Awareness 

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 perma-nganatesulphuric acid
  • (D) potassium dichromate-sulphuric acid
Correct Answer - Option(D)

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