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MCQs

Total Questions : 66 | Page 3 of 7 pages
Question 21. What will be the activity coefficient of a solution consisting of monovalent ions?
  1.    Equal to 1
  2.    >1
  3.    Close to 1
  4.    <0
 Discuss Question
Answer: Option C. -> Close to 1
Answer: (c).Close to 1
Question 22. In water treatment which factor which has a major control over reaction selectivity and product distribution?
  1.    pH
  2.    temperature
  3.    pressure
  4.    ionic concentration
 Discuss Question
Answer: Option A. -> pH
Answer: (a).pH
Question 23. The degradation of BOD is classified as what type of reaction?
  1.    First Order Reaction
  2.    Zero Order Reaction
  3.    Second Order Reaction
  4.    Third Order Reaction
 Discuss Question
Answer: Option A. -> First Order Reaction
Answer: (a).First Order Reaction
Question 24. What is the value of activity coefficients for monovalent and divalent ions for a potable water at an ionic strength of 0.01 M?
  1.    0.9 and 0.66 respectively.
  2.    0.9 in both the cases
  3.    0.66 and 0.9 respectively.
  4.    0.66 in both the cases
 Discuss Question
Answer: Option A. -> 0.9 and 0.66 respectively.
Answer: (a).0.9 and 0.66 respectively.
Question 25. In case of Moving Bed Bioreactor and Activated Sludge process which is the factor that limits the rate of the reaction?
  1.    temperature
  2.    pressure
  3.    pH
  4.    ionic composition
 Discuss Question
Answer: Option A. -> temperature
Answer: (a).temperature
Question 26. What is the mass transfer formula for a plug flow reactor?
  1.    q = Mₛ(C₀)
  2.    q = Q (C₀-C)
  3.    q = Q Mₛ(C₀-C)
  4.    q = Q MₛC
 Discuss Question
Answer: Option C. -> q = Q Mₛ(C₀-C)
Answer: (c).q = Q Mₛ(C₀-C)
Question 27. Dilution factor is the reciprocal of dilution.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 28. C= x⁄v
What does x stand for in the above formula?
  1.    Particles
  2.    Quantity
  3.    Volume
  4.    Area
 Discuss Question
Answer: Option A. -> Particles
Answer: (a).Particles
Question 29. The liquid phase controls the rate of mass transfer for compounds which have an H value of which of the following?
  1.    H>0.05
  2.    H=0.02
  3.    H<0.002
  4.    H=1
 Discuss Question
Answer: Option A. -> H>0.05
Answer: (a).H>0.05
Question 30. Dilution=volume added/total volume. What does total volume indicate?
  1.    Volume of the sample
  2.    Volume of the sample including blank
  3.    Volume of the sample excluding blank
  4.    Volume of the blank
 Discuss Question
Answer: Option B. -> Volume of the sample including blank
Answer: (b).Volume of the sample including blank

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