Air pollution from automobiles can be controlled by fitting
Air pollution from automobiles can be controlled by fitting
The correct option is C Catalytic converter
Explanation for correct option:
Option C:
- The main constituent pollutants from automobile exhaust are carbon monoxide, nitrogen oxides, unburned gasoline, carbon dioxide, and lead.
- A device can be fitted into the vehicle to reduce air pollution. This device is a catalytic converter.
- A catalytic converter is an exhaust emission control device that converts toxic gases to less toxic pollutants by catalyzing a redox reaction.
- This converter uses platinum-palladium and rhodium as catalysts which are expensive metals.
- The vehicles in which catalytic converters are installed should use unleaded petrol as lead present in petrol is responsible for inactivating the catalyst.
Explanation for incorrect option:
Option A:
The wet scrubber- This device is used to remove pollutants from the exhaust gas before the gas is released into the environment. They are used in industrial exhaust streams.
Option B:
Electrostatic precipitator- It is a device used to remove particles from a gas stream by using electrical energy to change particles to positively or negatively charged particles. They are used in industries like steel plants, and thermal energy plants.
Option D:
Cyclone separator- It is a method of removing particulates from an air gas or liquid stream without the use of filters. They are used in industries like gas turbines.
The above-mentioned devices are used for reducing pollution but are not meant for automobiles.
Hence, option (C) is the correct option.
Catalytic converter
Explanation for correct option:
Option C:
- The main constituent pollutants from automobile exhaust are carbon monoxide, nitrogen oxides, unburned gasoline, carbon dioxide, and lead.
- A device can be fitted into the vehicle to reduce air pollution. This device is a catalytic converter.
- A catalytic converter is an exhaust emission control device that converts toxic gases to less toxic pollutants by catalyzing a redox reaction.
- This converter uses platinum-palladium and rhodium as catalysts which are expensive metals.
- The vehicles in which catalytic converters are installed should use unleaded petrol as lead present in petrol is responsible for inactivating the catalyst.
Explanation for incorrect option:
Option A:
The wet scrubber- This device is used to remove pollutants from the exhaust gas before the gas is released into the environment. They are used in industrial exhaust streams.
Option B:
Electrostatic precipitator- It is a device used to remove particles from a gas stream by using electrical energy to change particles to positively or negatively charged particles. They are used in industries like steel plants, and thermal energy plants.
Option D:
Cyclone separator- It is a method of removing particulates from an air gas or liquid stream without the use of filters. They are used in industries like gas turbines.
The above-mentioned devices are used for reducing pollution but are not meant for automobiles.
Hence, option (C) is the correct option.
