A. II, III, I
B. III, II, I
C. I, II, III
D. I, III, II
Which of the following is not an air pollutant
The chemical entities present in thermosphere of the atmosphere
A sample of 100ml water required 0.294mg of K2Cr2O7(mol.wt=294)for oxidizing dissolved organic compounds in it. The C.O.D of water sample is