Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by_______________?

Related Mcqs:

1. Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by_________________?

   A. Quenching of hot coke
   B. Discharging in the river stream
   C. Filtration and recycling for cooling coke oven gas
   D. None of these

2. At room temperature, the product [H+] [OH-] in a solution is 10-14 moles/litre. If, [OH-] = 10-6 moles/litre, then the pH of the solution will be ________________________?

   A. 6
   B. 8
   C. 10
   D. 12

3. Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by__________________?

   A. Biological oxygen pond
   B. Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
   C. Lagoons
   D. Filtration

4. Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is _______________ micro gram (μ g)/litre?

   A. 22
   B. 42
   C. 332
   D. 1050

5. pH value of a solution containing 1 gm of hydrogen ion per litre will be ____________________?

   A. 0
   B. 1
   C. 7
   D. 10

6. Maximum permissible residual chlorine in treated water should be ____________ mg/litre?

   A. 0.001 to 0.01
   B. 0.2 to 0.3
   C. 2 to 3
   D. 5 to 10

7. TLV of aldrin in public water supply system is about ____________ μg/litre?

   A. 0.5
   B. 17
   C. 357
   D. 1097

8. Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which___________________?

   A. A homogeneous solution (say of phenol water) is formed
   B. Mutual solubility of the two liquids shows a decreasing trend
   C. Two liquids are completely separated into two layers
   D. None of these

9. Which is the best and the most effective method for the removal of organic contaminant present in the polluted water in very small quantity (say < 200 mg/litre) ?

   A. Lagooning
   B. Activated carbon adsorption
   C. Biological oxidation pond
   D. Chemical coagulation

10. A butane isomerisation process produces 70 k.mole/hr of pure iso-butane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be_________________?

    A. 3 kmole/hr
    B. 4 kmole/hr
    C. 5 kmole/hr
    D. 6 kmole/hr