Which of the following is used as a green solvent?

Among the following compounds,which one is not responsible for the depletion of ozone layer?

Consider the following reactions involving some atmospheric pollutants:
$NO + O_3 \rightarrow NO_2 + O_2$
$NO_2 \xrightarrow{h \nu} NO + O$
$O + O_2 \rightarrow O_3$
$4 NO_2 + O_2 + 2 H_2 O \longrightarrow 4 HNO_3$
$3 CH_4 + 2 O_3 \longrightarrow 3 H_2 C = O + 3 H_2 O$
Based on the above,the formation of formaldehyde from methane in the atmosphere will be controlled by:

Which of the following,when present in excess in drinking water,causes the disease methemoglobinemia?

Which of the following methods can be used to control water pollution?

The ozone layer is formed naturally by