Why should only unleaded petrol be used in the automobiles with catalytic converter?

Why is the use of unleaded petrol recommended for vehicles equipped with catalytic converters?

Why should coal and potroleum be used carefully?

Discuss briefly the following: Catalytic converter

Explain briefly : Catalytic converters

Which compressed gas is used in automobiles ?

Why should polythene or plastic not be burnt?

Why should oils and fats be not released in the drain? Explain.

Name any two metals used in the catalytic converters of automobiles.

Observe the diagram of the catalytic converter and answer the questions which follow: name any two metals used as catalyst in the catalytic converter.