The delicate balance of $\mathrm{CO}_2$ and $\mathrm{O}_2$ is NOT disturbed by:

Which of these reactions is not a part of breakdown of ozone in stratosphere?

The group of chemicals used as pesticide is

The electrode potential of the following half cell at 298 K . $\mathrm{X}\left|\mathrm{X}^{2+}(0.001 \mathrm{M})\right|\left|\mathrm{Y}^{2+}(0.01 \mathrm{M})\right| \mathrm{Y}$ is $\_\_\_\_$ $\times 10^{-2} \mathrm{~V}$ (Nearest integer). Given: $$...

Match List I with List II

The industrial activity held least responsible for global warming is :

The water quality of a pond was analysed and its BOD was found to be 4. The pond has

Correct statement is :

The number of correct statements from the following is ____
(A) Conductivity always decreases with decrease in concentration for both strong and weak electrolytes
(B)...

The radical which mainly causes ozone depletion in the presence of UV radiations is: