This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Ethyl  Mercaptan is a  substance with a foul but strong smell. It is mixed with LPG so as to detect it when LPG is leaking from the cyllinder. The smell will aware us that the gas has leaked. 
2 4 2