Chemistry Final test (Fill in the blank)

Liquefied petroleum gas is composed of propane and (a)   .

(a)   takes place in huge reactor.

Natural gas consists mainly of (a)   .

Coal is used in many countries to produce (a)   .

(a)   are fuels produced from renewable resources.

Crude oil is mixture of many different (a)   molecules.

A mixture of methane and steam is passed over a (a)   catalyst.

(a)   forms as the rubbish decays.

Nitrates from the atmosphere are (a)   on the soil.

(a)   helps in the treatment of alkaline soils.