Problem 21
The brown, hazy fumes of photochemical smog are due to (a) nitrogen dioxide (b) PAN formation (c) aldehydes (d) \(\mathrm{SO}_{2}\).
Problem 22
Which of the following is not a common component of photochemical smog? (a) Peroxyacetyl nitrate (b) Acrolein (c) Formaldehyde (d) Carbon dioxide
Problem 23
Which of the following gases is not responsible for photochemical smog? (a) Oxides of nitrogen (b) Hydrocarbons (c) Inert gases (d) Carbon monoxide
Problem 24
Photochemical smog is formed in (a) summer during day time (b) summer during morning time (c) winter during morning time (d) winter during day time.
Problem 28
The dissolution of ozone layer causes ozone hole in the blanket surrounding the atmosphere. What e the ill effects of ozone hole? (a) Greenhouse effect (b) Global warming (c) Acid rain (d) UV rays reaching the earth.
Problem 29
Which of the following free radicals is responsible for causing break down of ozone into oxygen due 10 use of,CFCs? (a) \(\mathrm{O}\) (b) \(\overrightarrow{\mathrm{Cl}}\) (c) \(\dot{\mathrm{C}} \mathrm{H}_{3}\) (d) \(\dot{\mathrm{OH}}\)
Problem 30
Freons are not recommended to be used in refrigerators because they (a) cause global warming (b) cause acid rain (c) cause depletion of ozone layer (d) cause very less cooling.
Problem 31
Ozone hole is maximum over (a) Europe (b) Antarctica (c) India (d) Africa.
Problem 32
In Antarctica, ozone depletion is due to the formation of which of the following compounds? (a) Acrolein (b) PAN (c) PCBs (d) Chlorine nitrate
Problem 34
Match the column I with column Il and mark the choice. appropriate $$ \begin{array}{|l|l|l|l|} \hline {\text { Column I }} && {\text { Column II }} \\ \hline \text { (A) } & \text { Peroxyacetyl nitrate } & \text { (i) } & \text { Global warming } \\ \hline \text { (B) } & \begin{array}{l} \text { Polychlorinated } \\ \text { biphenyls } \end{array} & \text { (ii) } & \begin{array}{l} \text { Photochemical } \\ \text { smog } \end{array} \\ \hline \text { (C) } & \begin{array}{l} \text { Dioxides of carbon } \\ \text { and sulphur } \end{array} & \text { (iii) } & \text { Water pollutant } \\ \hline \text { (D) } & \text { IR active molecules } & \text { (iv) } & \text { Acid rain } \\ \hline \end{array} $$ (a) \((\mathrm{A}) \rightarrow\) (ii), (B) \(\rightarrow(\) iii), \(\mathrm{C} \rightarrow\) (iv), (D) \(\rightarrow\) (i) (b) (A) \(\rightarrow\) (iii), (B) \(\rightarrow\) (iv), C \(\rightarrow\) (ii), (D) \(\rightarrow\) (i) (c) (A) \(\rightarrow\) (iv), (B) \(\rightarrow\) (ii), \(\mathrm{C} \rightarrow\) (iii), (D) \(\rightarrow\) (i) (d) (A) \(\rightarrow(\mathrm{i}),(\mathrm{B}) \rightarrow\) (iii), \(\mathrm{C} \rightarrow\) (ii), (D) \(\rightarrow\) (iv)
