Select the incorrect statement from the following.

Easy

A

In an electrostatic precipitator, the velocity of air between the plates must be high.
B

Motor vehicles equipped with catalytic converter should use unleaded petrol because lead in the petrol inactivates the catalyst.
C

Unlike petrol or diesel, CNG burns most efficiently in the automobiles and very little of it is left unburnt
D

Bharat stage IV emission norms have come into force throughout the country since April 2017

Solution

An electrostatic precipitator has electrode wires that are maintained at several thousand volts, which produce a corona that releases electrons. These electrons attach to dust particles giving them a net negative charge. The collecting plates are grounded and attract the charged dust particles. The velocity of air between the plates must be low enough to allow the dust to fall.

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