Short Answer TypeWhy is it desirable to use unleaded petrol in vehicles fitted with catalytic converters?
(a) Name any two places where it is essential to install electrostatic percipitators. Why is it required to do so?
(b) Mention one limitation of the electrostatic precipitator.
A. State the consequence if the electrostatic precipitator of a thermal plant fails to function.
B. Mention any four methods by which the vehicular air pollution can be controlled.
A. The thermal plants release particulate matter, which is considered very harmful for the human health. The electrostatic precipitator helps in the removal of particulate matter and can remove over 99 per cent of it present in the exhaust of the thermal power plant.
It has electrode wires that are maintained at several thousand volts. These produce a corona that releases electrons. The electron attach to the dust particles giving them a negative charge. The collecting plates of the precipitator are grounded and thus attract the charged dust particles. The scrubber removes gases like sulphur dioxide.
Four important methods that can be implemented to reduce pollution
1. Use of lead-free petrol .
2. Catalytic converter such as platinum-palladium and rhodium should be used for decreasing emission of poisonous gases.
3. Use of CNG.
4 . Reducing the sulphur and aromatic content in petrol and diesel fuels.
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