The biological decomposition of organic substances in wastes controlled conditions is called_________________?

Related Mcqs:

1. Biological oxidation ponds remove organic matters present in the polluted water by _______________?

   A. Using the activities of bacteria and other micro organisms B. Aerobic oxidation C. Both A. & B. D. Neither A. nor B....

2. What are the methods of treatment & disposal of radioactive wastes ?

   A. Evaporation & chemical precipitation B. Biological methods & adsorption in ion exchange materials C. Fixing into a solid mass with cement and sinking deep in the sea D. All A., B. & C....

3. The equation relating E, P, V and T which is true for all substances under all conditions is given by (∂E/∂V)T = T(∂P/∂T)H – P. This equation is called the ___________________?

   A. Maxwell’s equation B. Thermodynamic equation of state C. Equation of state D. Redlich-Kwong equation of state...

4. Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters ?

   A. I-131 B. Sr-90 C. Au-198 D. Ra-226...

5. Radioactive solid nuclear wastes are disposed off by _________________?

   A. High temperature incineration B. Pathological incineration C. Pyrolysis D. Underground burial in concrete containers...

6. Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyll and haemoglobin breakdown of some animals, beyond TLV (>50 ppm) ?

   A. Acts as a green house gas thereby raising earth’s temperature B. Causes asphyxia C. Causes increase in sea level D. Enhances the green house effect...

7. In case of the decomposition of hydroiodic acid (2HI ⇌ H2 + I2), addition of H2 (at equilibrium condition) will__________________?

   A. Increase the partial pressure of I2 B. Decrease the partial pressure of HI C. Diminish the degree of dissociation of HI D. None of these...

8. Pick out the wrong statement pertaining to the decomposition of PCl5 represented by, PCl5 ⇌ PCl3 + Cl2.Degree of dissociation of PCl5 will_________________?

   A. Decrease on addition of Cl2 B. Increase on addition of an inert gas at constant pressure C. Decrease on increasing the pressure of the system D. None of these...

9. In the decomposition of PCl5 represented by, PCl5 ⇌ PCl3 + Cl2, decrease in the pressure of the system will _____________ the degree of dissociation of PCl5?

   A. Increase B. Decrease C. Not alter D. None of these...

10. Heat requirement for decomposition of a compound into its elements is _____________ that is evolved during the formation of that compound from its elements?

    A. The same B. Less than C. Greater than D. Different than...