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MCQs

Total Questions : 133 | Page 8 of 14 pages
Question 71. Which of the following is the disadvantage of ICP mass spectroscopy?
  1.    Incapable of multi-element analysis
  2.    Less sensitivity
  3.    Impossible to obtain isotopic information
  4.    Not useful for detection of non-metals
 Discuss Question
Answer: Option D. -> Not useful for detection of non-metals
Answer: (d).Not useful for detection of non-metals
Question 72. The isobaric interference is not caused in which of the following elements?
  1.    Argon
  2.    Oxygen
  3.    Helium
  4.    Nitrogen
 Discuss Question
Answer: Option C. -> Helium
Answer: (c).Helium
Question 73. Which of the following is the disadvantage of gas chromatography?
  1.    It is not a good method
  2.    It cannot be used for qualitative analysis
  3.    It cannot be used for the separation of volatile components
  4.    It does not provide direct identification
 Discuss Question
Answer: Option D. -> It does not provide direct identification
Answer: (d).It does not provide direct identification
Question 74. Cold tray is provided for liquid N₂ or CO₂ but is used only for extremely small samples.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 75. Which of the following is the most sensitive of the spectral methods?
  1.    Absorption spectroscopy
  2.    Mass spectroscopy
  3.    Flame emission spectroscopy
  4.    Atomic emission spectroscopy
 Discuss Question
Answer: Option B. -> Mass spectroscopy
Answer: (b).Mass spectroscopy
Question 76. Which of the following is most often used in the chromatograph in gas chromatograph MS?
  1.    Curvette
  2.    Paper support
  3.    Capillary tube
  4.    Flask
 Discuss Question
Answer: Option C. -> Capillary tube
Answer: (c).Capillary tube
Question 77. GC- MS has been developed for which of the following systems?
  1.    Packed column
  2.    Open tubular column
  3.    Capillary column
  4.    Porous layer column
 Discuss Question
Answer: Option A. -> Packed column
Answer: (a).Packed column
Question 78. The carrier gas with low molecular weight would diffuse at a higher rate than the higher molecular weight sample.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 79. Which of the following is the type of separator used in commercial GC-MS systems?
  1.    Jet type molecular separator
  2.    Porous tube
  3.    Teflon tube
  4.    Flow type separator
 Discuss Question
Answer: Option A. -> Jet type molecular separator
Answer: (a).Jet type molecular separator
Question 80. Which of the following problems occur when combining gas chromatography and mass spectroscopy?
  1.    Difference in operating pressures
  2.    Reduction in sensitivity
  3.    Direct identification is not possible
  4.    It does not permit direct introduction of the effluent
 Discuss Question
Answer: Option A. -> Difference in operating pressures
Answer: (a).Difference in operating pressures

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