An electrostatic precipitator is used in thermal power plants to remove $...........$ from the exhaust gases.

In almost all major Indian metropolitan cities like Delhi,the major atmospheric pollutants are .........

What does a high $BOD$ of water indicate?

Which of the following is a biodegradable pollutant?

Electrostatic Precipitator $(ESP)$:
$I.$ Is an electrical device to remove particulate matter present in the exhaust of thermal power plant.
$II.$ More than $99\, \%$ particulate matter can be removed by this method.
$III.$ $ESP$ has electrode wires and a stage of collecting plates.
Which of the statements given above are correct?

Photochemical smog always contains