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MCQs

Total Questions : 136 | Page 8 of 14 pages
Question 71. Base line resolution is achieved when degree of resolution/separation is ______
  1.    1
  2.    0
  3.    0.5
  4.    1.5
 Discuss Question
Answer: Option D. -> 1.5
Answer: (d).1.5
Question 72. In which type of chromatography, the stationary phase held in a narrow tube and the mobile phase is forced through it under pressure?
  1.    Column chromatography
  2.    Planar chromatography
  3.    Liquid chromatography
  4.    Gas chromatography
 Discuss Question
Answer: Option A. -> Column chromatography
Answer: (a).Column chromatography
Question 73. In chromatography, which of the following can the mobile phase be made of?
  1.    Solid or liquid
  2.    Liquid or gas
  3.    Gas only
  4.    Liquid only
 Discuss Question
Answer: Option B. -> Liquid or gas
Answer: (b).Liquid or gas
Question 74. Chromatography is a physical method that is used to separate and analyse __________
  1.    Simple mixtures
  2.    Complex mixtures
  3.    Viscous mixtures
  4.    Metals
 Discuss Question
Answer: Option B. -> Complex mixtures
Answer: (b).Complex mixtures
Question 75. In chromatography, the stationary phase can be ___________ supported on a solid.
  1.    Solid or liquid
  2.    Liquid or gas
  3.    Solid only
  4.    Liquid only
 Discuss Question
Answer: Option A. -> Solid or liquid
Answer: (a).Solid or liquid
Question 76. Which of the following cannot be used as an adsorbent in Column adsorption chromatography?
  1.    Magnesium oxide
  2.    Silica gel
  3.    Activated alumina
  4.    Potassium permanganate
 Discuss Question
Answer: Option D. -> Potassium permanganate
Answer: (d).Potassium permanganate
Question 77. Which of the following is the disadvantage of helium, which can be used as carrier gas in gas chromatography?
  1.    Dangerous to use
  2.    Expensive
  3.    Reduced sensitivity
  4.    High density
 Discuss Question
Answer: Option B. -> Expensive
Answer: (b).Expensive
Question 78. Which of the following is the disadvantage of nitrogen, which can be used as carrier gas in gas chromatography?
  1.    Dangerous to use
  2.    Expensive
  3.    Reduced sensitivity
  4.    High density
 Discuss Question
Answer: Option C. -> Reduced sensitivity
Answer: (c).Reduced sensitivity
Question 79. Which of the following is the disadvantage of hydrogen, which can be used as carrier gas in gas chromatography?
  1.    Dangerous to use
  2.    Expensive
  3.    Reduced sensitivity
  4.    High density
 Discuss Question
Answer: Option A. -> Dangerous to use
Answer: (a).Dangerous to use
Question 80. Slow injection of large samples leads to band broadening and loss of resolution.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True

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