RRB Group D 27-Sep-2018 Shift 1 Solved Paper

Propane gas is used as an illuminating gas.
Propane becomes a gas when it is released to fuel gas appliances. Propane is very similar to natural gas. An odorant, called mercaptan, is added to propane so escaping gas can be detected. And like all fossil fuels-coal, petroleum, natural gas - propane is a non-renewable energy source.