Identify the correct decreasing order of the following with respect to altitude from atmosphere:I. Troposphere II. Mesosphere III. Thermosphere
A. II, III, I
B. III, II, I
C. I, II, III
D. I, III, II
The chemical entities present in thermosphere of the atmosphere
A. O2+ , O+ , NO+
B. O3
C. N2 , O2 , CO2, H2O
D. O3 , O2+ , O2
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
A. 0.04 ppm
B. 0.48 ppm
C. 0.005 ppm
D. 294 ppm