EVERYDAY SCIENCE

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ENVIRONMENTAL SCIENCES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A device in a motor vehicle that reduces the amount of air pollutants in emissions is a(n)
A
catalytic converter
B
scrubber
C
chlorofluorocarbon
D
inversion
Explanation: 

Detailed explanation-1: -A catalytic converter is a simple device that uses basic redox reactions to reduce the pollutants emitted from vehicles. It converts the harmful pollutants produced from the car engine into less harmful gases. It is composed of a metal housing with a ceramic honeycomb-like interior with insulating layers.

Detailed explanation-2: -A catalytic converter is a unit that fits into the front part of exhaust system of a vehicle, close to the engine, to reduce the emission of gaseous pollutants, such as carbon monoxide (CO), nitrogen oxides (NOx) and hydrocarbons (HCs).

Detailed explanation-3: -Essentially, a catalytic converter filters out harmful byproducts in the exhaust gases and burns them up. And while the main function of a catalytic converter is to reduce harmful emissions, it also improves your car’s efficiency.

Detailed explanation-4: -A catalytic converter is an exhaust emission control device that reduces toxic gases and pollutants in exhaust gas from motor vehicle engines into less-toxic pollutants by catalyzing a redox reaction (an oxidation and a reduction reaction). Catalytic converters are used with gasoline and diesel-powered engines.

Detailed explanation-5: -Eco-driving systems, eco-routing systems, congestion pricing, and car-sharing are some of the strategies to reduce vehicular emissions. Alternative fuels like CNG, ethanol, biodiesel, and others may perform better than conventional fuels but are not emission-free.

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