Which of the following is not an air pollutant
N2
N2O
NO
CO
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
0.04 ppm
0.48 ppm
0.005 ppm
294 ppm
Identify the correct decreasing order of the following with respect to altitude from atmosphere:I. Troposphere II. Mesosphere III. Thermosphere
II, III, I
III, II, I
I, II, III
I, III, II
The chemical entities present in thermosphere of the atmosphere
O2+ , O+ , NO+
O3
N2 , O2 , CO2, H2O
O3 , O2+ , O2