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MCQs

Total Questions : 151 | Page 2 of 16 pages
Question 11. The difference between measured activity and actual concentration becomes higher at higher concentration. Is this statement true or false?
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 12. Ion selective electrodes have ________ linear range and _________ detection limit than the pH electrode.
  1.    Lower, lower
  2.    Lower, higher
  3.    Higher, lower
  4.    Higher, higher
 Discuss Question
Answer: Option B. -> Lower, higher
Answer: (b).Lower, higher
Question 13. In Ammonia electrode, diffusion of dissolved ammonia occurs through the membrane until which of the following conditions occur?
  1.    Concentration becomes equal on both sides
  2.    Activity becomes equal on both sides
  3.    Partial pressure becomes equal on both sides
  4.    Differential pressure is low
 Discuss Question
Answer: Option C. -> Partial pressure becomes equal on both sides
Answer: (c).Partial pressure becomes equal on both sides
Question 14. When electrode potential response is plotted as a function of ammonia concentration on a semi-log graph, the graph obtained will be ____________
  1.    A straight line
  2.    Parabolic
  3.    Sigmoidal
  4.    A curve
 Discuss Question
Answer: Option A. -> A straight line
Answer: (a).A straight line
Question 15. How can samples above 1M in ammonia concentration be measured using ammonia electrode?
  1.    It must be diluted and measured
  2.    It cannot be measured
  3.    The electrode has to be modified for measuring
  4.    It can be measured directly
 Discuss Question
Answer: Option A. -> It must be diluted and measured
Answer: (a).It must be diluted and measured
Question 16. The dilution of solution must not reduce the level of ammonia below _________
  1.    10⁻² M
  2.    10⁻⁵ M
  3.    10⁻⁸ M
  4.    10⁻⁹ M
 Discuss Question
Answer: Option B. -> 10⁻⁵ M
Answer: (b).10⁻⁵ M
Question 17. The performance of ammonia electrode is not affected by sample colour and turbidity.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 18. Which of the following factors does not the reproducibility of the ammonia electrode?
  1.    Temperature
  2.    Drift
  3.    Noise
  4.    Dilution
 Discuss Question
Answer: Option D. -> Dilution
Answer: (d).Dilution
Question 19. In fluoride ion electrode, the potential corresponding to level of the fluoride ion is described by which of the following equations when E is the measured electrode potential, E₀ is the reference potential and A is the level of fluoride ions in solution?
  1.    E=E₀+0.0591 log A
  2.    E=E₀-0.0591 log A
  3.    E=E₀+0.0896 log A
  4.    E=E₀-0.0896 log A
 Discuss Question
Answer: Option B. -> E=E₀-0.0591 log A
Answer: (b).E=E₀-0.0591 log A
Question 20. What does TISAB which is used to overcome interferences stand for?
  1.    Total Isolation Strength Absolute Buffer
  2.    Total Ionic Strength Absolute Buffer
  3.    Total Ionic Strength Adjustment Buffer
  4.    Total Isolation Strength Adjustment Buffer
 Discuss Question
Answer: Option C. -> Total Ionic Strength Adjustment Buffer
Answer: (c).Total Ionic Strength Adjustment Buffer

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