Question

In Great Britain during the past years, thousands of motorists have been (politely) stopped by the police and asked to blow into a "breathalyzer": a glass tube containing silica gel impregnated with certain chemicals, and leading into a plastic bag. If for more than half the length of the tube, the original yellow color turns green, the motorist look very unhappy and often turns red. What chemicals are impregnated on the silica gel, why does the tube turn green, and why does the motorist turn red? Also not down the reaction.

Answer 1

Answer:

police no asked original no ok bro