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

Acid rain is caused by:

Choose the correct statement.

$A$ : $ESP$ can remove particulate matter by more than $99\;\%$.
$R$ : Anode attracts the particles and provides a positive charge to them,allowing them to fall.

Which pollutant undergoes biomagnification in a food chain?

Catalytic converters:
$I.$ These are fitted into automobiles for reducing emission of poisonous gases like $NO_x$ and $CO$.
$II.$ They have expensive metals like platinum,palladium,and rhodium as catalysts.
$III.$ As the exhaust emission passes through the catalytic converter,nitric oxide splits into nitrogen and oxygen; carbon monoxide is oxidized to carbon dioxide,and unburnt hydrocarbons are burnt completely into $CO_2$ and $H_2O$.
$IV.$ Motor vehicles fitted with catalytic converters should use unleaded petrol because lead in the petrol inactivates the catalyst.
Which of the statements given above are correct about catalytic converters?