Question
Why is ozone depletion mainly over Antartica?

Answer

This is because in other parts of stratosphere, chlorine free radicals combine away to form harmless products.
It Antarctica, compounds formed are converted into chlorine free radical again which cause ozone depletion.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

For oxidation of iron,$4\text{Fe(s)}+3\text{O}_2(\text{g})\overrightarrow{\ \ \ \ \ \ }\ 2\text{Fe}_2\text{O}_3(\text{s})$
entropy change is $-549.4 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}$ at 298 K . Inspite of negative entropy change of this reaction, why is the reaction spontaneous? $\left(\Delta_{\mathrm{r}} \mathrm{H}^{\circ}\right.$ for this reaction is $\left.-1648 \times 10^3 \mathrm{~J} \mathrm{~mol}^{-1}\right)$
Among the elements Li, K, Ca, S and Kr, which one is expected to have the lowest first ionisation enthalpy and which one has the highest first ionisation enthalpy?
Calculate the solubility of $A _2 X _3$ in pure water, assuming that neither kind of ion reacts with water. The solubility product of $A _2 X _3, K_{ sp }=1.1 \times 10^{-23}$.
Calculate number of molecules in 16 g of $\mathrm{CH}_4$.
What is state of hybridization of the carbon atoms in $\text{CH}_3-\text{HC}=\text{CH}_2?$
Calculate the uncertainty in position of an electron if uncertainty in its velocity is $0.001 \%$. Mass of electron $=9.1 \times 10^{-31} \mathrm{~kg}$, velocity of electron $=300 \mathrm{~ms}^{-1}$.
$\left(\mathrm{h}=6.626 \times 10^{-34} \mathrm{~kg} / \mathrm{m}^2 \mathrm{~s}^{-1}\right)$
What are the correct thermodynamic conditions for the spontaneous reaction at all temperature?
Heat capacity $\left(C_p\right)$ is an extensive property but specific heat (c) is an intensive property. What will be the relation between $C_p$ and $c$ for 1 mol of water?
A balloon is filled with hydrogen at room temperature. It will burst if pressure exceeds 0.2bar. If at I ha r the gas occupies 2.27L volume, up to what volume Ca.. the balloon be expanded?
At 0°C, ice and water are present in equilibrium.
What will happen on increasing the pressure?