Question

Lpg
does not have any smell but we however we the smell when the gas leaks

Answer 1

A chemical named ethyl mercaptan is added so that whenever gas leaks it can be detected.

Answer 2

LPG gas is basically propane and butane, and it isodorless in its natural state. The smell that younotice when there is a leak is actually of an entirely different agent, called Ethyl Mercaptan. ... But the amount added to LPG is safe and does not cause any issues.

hope it is helpful