Question

Read the following statements carefully.
(i) An electrostatic precipitator removes particulate matter by imposing negative charge on them.
(ii) Catalytic converters convert unburnt hydrocarbons into ${CO}_2$ and water.
(iii) Peroxyacyl nitrates (PAN) is a secondary pollutant.
(iv) DDT is a non-biodegradable pollutant.
Which of the above statements are incorrect ?

• A. (i) and (ii)
• B. (iii) and (iv)
• C. (i) and (iii)
• D. None of these

Answer 1

Answer: (D)

None of these

An electrostatic precipitator removes particulate matter by imposing a negative charge on them. Then they are separated electrostatically.
Catalytic converters convert unburnt hydrocarbons into CO2CO2 and water. They are used in automobiles.
Peroxyacyl nitrates (PANs) is a secondary pollutant formed by reaction of oxides of nitrogen and unsaturated hydrocarbons.
DDT is a non-biodegradable pollutant.

All the given statements in the question are correct,

So, the correct option is 'None of these'.