1 In Oxygen-Sag Curve, at the critical point, the rate of
reaeration becomes ________ the rate of Deoxygenation
Select one:
Double
Equal to
Half
2. In general, adsorption of a gas on solid surface
is_________process
Select one:
Endothermic
Exothermic
None
3. Which of the following tests can be performed in relatively
shorter period of time?
Select one:
TOC
BOD
COD
All require same time
4. In Claus process, H2S is converted
to____________
Select one:
SO3
disulphide
Elemental Sulphur
5. Which...