Identify the odd one out from the following:
Peat, Coal tar, Ammonia, Coke gas
Based on the carbon content, coal is classified into four types: Peat, lignite, Bituminous and anthracite. When coal is distilled in absence of air then the substances obtained are: Ammonia, coke, coal gas, coal tar. so, the odd one out here is peat because it is type of coal and other three are substances obtained after the fractional distillation of coal.