Match the following:
List-1: List-2:
A Nitrogen oxides I Oxygen transport
B Carbon monoxide II Biomagnification
C Carbon dioxide III Photochemical smog
D Industrial effluents IV Global warming
V Increase of BOD
If 0.01 mol of $\mathrm{P_4O_{10}}$ is removed from 0.1 mol, then the remaining molecules of $\mathrm{P_4O_{10}}$ will be:
An element has two isotopes having atomic masses 10 and 15 u, respectively. If the percent abundance of lighter isotopes is 80%, then the average atomic mass of the element is: