Identify the relation and fill in the blanks
LPG: Butane: LNG:______
$$Methane$$
LPG is composed of hydrocarbons containing three or four carbon atoms. The normal components of LPG thus, are propane $$(C_3H_8) $$ and butane $$(C_4H_{10}). $$
Liquefied natural gas, or LNG, is natural gas in its liquid form. LNG is neither corrosive nor toxic. Natural gas is primarily methane, with low concentrations of other hydrocarbons, water, carbon dioxide, nitrogen, oxygen, and some sulfur compounds.