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MCQs

Total Questions : 133 | Page 13 of 14 pages
Question 121. The ions are passed into the high vacuum analyser through which of the following?
  1.    Orifice
  2.    Nozzle
  3.    Nebulizer
  4.    Venturi tube
 Discuss Question
Answer: Option A. -> Orifice
Answer: (a).Orifice
Question 122. Only ______ percent of the effluent of the liquid chromatography must be introduced in the mass spectrometer.
  1.    1-2 %
  2.    1-5 %
  3.    1-20 %
  4.    1-15 %
 Discuss Question
Answer: Option B. -> 1-5 %
Answer: (b).1-5 %
Question 123. Which of the following is the normal nebuliser temperature used in LC mass spectrometry?
  1.    50-100°C
  2.    100-200°C
  3.    125-150°C
  4.    150-200°C
 Discuss Question
Answer: Option C. -> 125-150°C
Answer: (c).125-150°C
Question 124. Under which of the following temperatures is the ionisation chamber maintained?
  1.    100°C
  2.    200°C
  3.    300°C
  4.    400°C
 Discuss Question
Answer: Option B. -> 200°C
Answer: (b).200°C
Question 125. Which of the following is used to inject liquid samples?
  1.    Hypodermic needle
  2.    Glass bulb
  3.    Capillary tube
  4.    Curvette
 Discuss Question
Answer: Option A. -> Hypodermic needle
Answer: (a).Hypodermic needle
Question 126. Which of the following is not a characteristic of nebulizers that are commonly used?
  1.    Low cost
  2.    Low uptake rate
  3.    High efficiency
  4.    High uptake rate
 Discuss Question
Answer: Option D. -> High uptake rate
Answer: (d).High uptake rate
Question 127. In glow discharge ion source, the sample is atomised by which of the following process?
  1.    Evaporation
  2.    Sputtering
  3.    Heating
  4.    Annealing
 Discuss Question
Answer: Option B. -> Sputtering
Answer: (b).Sputtering
Question 128. Which of the following produces the electron beam in magnetic deflection mass spectrometer?
  1.    Tungsten filament
  2.    Quartz rod
  3.    Silica
  4.    Rhodium filament
 Discuss Question
Answer: Option A. -> Tungsten filament
Answer: (a).Tungsten filament
Question 129. Which of the following is true about time of flight analyser spectrometers?
  1.    Lighter particles arrive at the detector earlier
  2.    Heavier particle arrive at the detector earlier
  3.    Lighter and heavier particles arrive together at the detector
  4.    Lighter particles do not reach the detector
 Discuss Question
Answer: Option A. -> Lighter particles arrive at the detector earlier
Answer: (a).Lighter particles arrive at the detector earlier
Question 130. Which of the following is an ion optic device in which ions pass through a mirror and their flight is reversed?
  1.    Reversal device
  2.    Reflectron
  3.    Mirror arrangement
  4.    Separation chamber
 Discuss Question
Answer: Option B. -> Reflectron
Answer: (b).Reflectron

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