NEET 2018 Botany Air Pollution MCQ Question with Solution

Which of the following is a secondary pollutant?

A

SO₂

B

CO₂

C

CO

D

O₃

Option D

Ozone (O₃) is a secondary pollutant formed by the reaction of primary pollutants like NOx and VOCs in the presence of sunlight.

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In sewage treatment, primary treatment basically involves physical removal of particles from the sewage through;

Which of the following molecules represent the order of hybridisation sp², sp², sp, sp from left to right atoms?

Select the option with correct matching –

The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is