The irritant red haze in traffic and congested places is due to the presence of which of the following?
$(i)$ Oxides of sulphur
$(ii)$ Oxides of nitrogen
$(iii)$ Carbon dioxide
$(iv)$ Mists,smoke and dust
$(v)$ Smog

The concentration of dissolved oxygen $(DO)$ in cold water can go up to ......... $ppm$.

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R).$
Assertion $(A):$ Photochemical smog causes cracking of rubber.
Reason $(R):$ Presence of ozone,nitric oxide,acrolein,formaldehyde and peroxyacetyl nitrate in photochemical smog makes it oxidizing.
Choose the most appropriate answer from the options given below:

The scientists who explained that the greenhouse effect and the Earth's atmosphere function in a similar way were ...... .

Which of the following is responsible for the depletion of ozone in the stratosphere?

Which of the following is a lung irritant that can lead to an acute respiratory disease in children?