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MCQs

Total Questions : 1913 | Page 7 of 192 pages
Question 61. PH value of H₂SO₄ (5% concentration) is
  1.    5
  2.    7
  3.    > 7
  4.    < 7
 Discuss Question
Answer: Option D. -> < 7
Question 62. Pick out the wrong unit conversion of heat transfer co-efficient.
  1.    1 kcal/m².hr.°C = 0.2048 BTU/ft².hr. °F. = 1.163 W/m².°K
  2.    1 kcal/m².hr.°K = 1.163 W/m².°C
  3.    1 W/m² . °C = 0.1761 BTU/ft².hr.°F
  4.    1 BTU/ft².hr.°F = 4.88 kcal/m².hr.°C = 20.44 kJ/m².hr°C = 5.678 W/m².°C
 Discuss Question
Answer: Option B. -> 1 kcal/m².hr.°K = 1.163 W/m².°C
Question 63. With increase in the temperature of pure (distilled) water, its
  1.    POH decreases and pH increases
  2.    POH and pH both 4ecreases
  3.    PH and pOH both increases
  4.    PH decreases and pOH increases
 Discuss Question
Answer: Option B. -> POH and pH both 4ecreases
Question 64. Pick out the wrong unit conversion of mass transfer co-efficient.
  1.    1 lb/hr.ft³.atm. = 4.8182 kg/hr.m².bar
  2.    1 kg/hr.m².atm= 0.98687 kg/hr. m .bar
  3.    1 lb/hr . ft² = 4.8823 kg/hr . m²
  4.    1 kg/hr . m² = 4.8823 lb/hr . ft²
 Discuss Question
Answer: Option D. -> 1 kg/hr . m² = 4.8823 lb/hr . ft²
Question 65. As per Kirchoff s equation, the heat of reaction is affected by the
  1.    Pressure
  2.    Volume
  3.    Temperature
  4.    Molecularity
 Discuss Question
Answer: Option C. -> Temperature
Question 66. Size range of the colloidals particles is
  1.    5 - 200 milli-microns
  2.    50 - 200 microns
  3.    500 - 1000 microns
  4.    10 - 50 Angstrom
 Discuss Question
Answer: Option A. -> 5 - 200 milli-microns
Question 67. In a binary liquid system, the composition expressed as __________ is independent of the temperature & pressure.
  1.    Kg of solute/kg of solvent
  2.    Kg-mole of solute/kg-mole of solvent
  3.    Kg-mole of solute/1000 kg of solvent
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 68. The atomic weight of helium is 4 times that of hydrogen. Its diffusion rate as compared to hydrogen will be __________ times.
  1.    1/2
  2.    4
  3.    √2
  4.    1/4
 Discuss Question
Answer: Option C. -> √2
Question 69. Which of the following is followed by an ideal solution ?
  1.    Boyle's law
  2.    Amgat's law
  3.    Raoult's law
  4.    Trouton's rule
 Discuss Question
Answer: Option C. -> Raoult's law
Question 70. According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.
  1.    No component is concentrated at the surface of the solution
  2.    The component molecules are non polar and are of almost equal size
  3.    In the formation of solution, chemical combination/molecular association between unlike molecules takes place
  4.    The attractive forces between like and unlike molecules are almost equal
 Discuss Question
Answer: Option C. -> In the formation of solution, chemical combination/molecular association between unlike molecules takes place

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