Question

Which of the following minerals is used in the catalytic converter ?
A. Gold
B. Manganese
C. Platinum
D. None of the above

Answer 1

A catalytic converter is an exhaust emission control device that is fitted in the engines of the machines. It helps in reducing the toxic gases that are emitted by automobiles into less toxic- pollutants. It is done so by catalyzing a redox reaction.

Complete answer:
There are millions of cars that are running on the roads and each one of them is a source of pollution. Especially in metropolitan and large cities, the amount of pollution that they emit is large.
To solve this problem, cities, states and the federal and democratic governments create clean -air laws that restrict the amount of pollution that a car can produce. Past many years, automakers had to consider these laws and have made refinement in the car engines and fuel system to keep up with these lawas. One such change came was about 1975 with an interesting device called as catalytic convertor.
A catalytic converter is a device that is used to convert harmful pollutants into less harmful emission before they are released from the car's exhaust. It is used to reduced these gases:
a. Carbon monoxide- it is a poisonous gas that is colourless as well as odourless.
b. Hydrocarbons- It contributes in smog produced mostly from evaporates and from unburnt fuel.
c. Nitrogen oxide- It contributes to smog and acid rain.
Catalytic converters have expensive metals namely platinum - palladium and rhodium as the catalysts,are fitted into automobiles for reducing emission of poisonous gasses.As the exhaust passes through the catalytic converter, unburnt hydrocarbons are converted into carbon dioxide and nitrogen gas ,respectively.motor vehicle equipped with catalytic converter should use unleaded petrol because lead in the petrol inactivates the catalyst.

So, the correct answer is option C, Platinum.

Note: Modern cars are equipped with three ways catalytic converters. This refers to three regulated emissions it helps to reduce. The reduction catalyst is the first stage of the catalytic converter in which they reduce nitric oxide emission with the help of platinum and rhodium. The oxidation catalyst is the second stage of the catalytic converter that reduces unburned hydrocarbons and carbon monoxide by burning. The third stage of conversion is a control system that monitors the exhaust stream.