List two advantages of the use of unleaded petrol in automobiles as fuel.
Advantages of unleaded petrol as a fuel:
(i) Unleaded petrol is lead free and does not release lead compounds which inactivate the catalysts in cars fitted with catalytic converters. Hence it emits less amount of harmful gases into the atmosphere.
(ii) Unleaded petrol burns most efficiently and very little amount of toxic fumes are release. This improves the quality of air hence causing less air pollution.
(iii) It allows the catalytic converter to remain active.