The law enforcement agencies use a chemi...

The law enforcement agencies use a chemical test to approximate a person's blood alcohol level. The person under going the test blows into the mouthpiece of a bag containing sodium dichromate solution in acidic medium. A chemical reaction with ethanol changes the colour of the solution from

orange to green

orange to colourless

yellow to orange

colourless to orange

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The law enforcement agencies use a chemical test to approximate a person's blood alcohol level. The person under going the test blows into the mouthpiece of a bag containing sodium dichromate solution in acidic medium. A chemical reaction with ethanol changes the colour of the solution from

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