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MCQs

Total Questions : 115 | Page 12 of 12 pages
Question 111. What is the unit of diffusion coefficient?
  1.    m²
  2.    s
  3.    m² s
  4.    m²/s
 Discuss Question
Answer: Option D. -> m²/s
Answer: (d).m²/s
Question 112. What is the molecular volume of air at normal boiling point?
  1.    29.89 cm³/gm mole
  2.    39.89 cm³/gm mole
  3.    49.89 cm³/gm mole
  4.    59.89 cm³/gm mole
 Discuss Question
Answer: Option A. -> 29.89 cm³/gm mole
Answer: (a).29.89 cm³/gm mole
Question 113. What is the molecular weight of ammonia?
  1.    31
  2.    53
  3.    29
  4.    39
 Discuss Question
Answer: Option C. -> 29
Answer: (c).29
Question 114. What is the value of Schmidt number for hydrogen?
  1.    0.23
  2.    0.22
  3.    0.21
  4.    0.21
 Discuss Question
Answer: Option B. -> 0.22
Answer: (b).0.22
Question 115. Estimate the diffusion coefficient for ammonia in air t 25 degree Celsius temperature and one atmospheric pressure.
For ammonia,
Molecular weight = 17
Molecular volume = 25.81 cm³/gm mole
For air,
Molecular weight = 29
  1.    0.4880 cm²/s
  2.    0.3880 cm²/s
  3.    0.2880 cm²/s
  4.    0.1880 cm²/s
 Discuss Question
Answer: Option D. -> 0.1880 cm²/s
Answer: (d).0.1880 cm²/s

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