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MCQs

Total Questions : 1913 | Page 9 of 192 pages
Question 81. Pick out the wrong unit conversion.
  1.    L kgf= 9.8 Newton
  2.    1 stoke = 1 m²/second
  3.    1 Pascal second = 10 poise
  4.    1 ppm = 1 ml/m³ = 1 mg/kg
 Discuss Question
Answer: Option B. -> 1 stoke = 1 m²/second
Question 82. Pick out the wrong unit conversion.
  1.    1 Joule = 4.186 calorie
  2.    1 kcal = 3.968 BTU = 0.00116 kWh = 0.00156 hp
  3.    1 ton of TNT (tri-nitro-toluene) = 4.2 GJ (1G = 10⁹)
  4.    1 ft.lbf= 0.3238 calorie = 0.1383 kg.m = 1.356 J = 1.356 N.m
 Discuss Question
Answer: Option A. -> 1 Joule = 4.186 calorie
Question 83. No cooling occurs, when an ideal gas undergoes unrestrained expansion, because the molecules
  1.    Collide without loss of energy
  2.    Do work equal to loss in kinetic energy
  3.    Are above the inversion temperature
  4.    Exert no attractive force on each other
 Discuss Question
Answer: Option C. -> Are above the inversion temperature
Question 84. In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality?
  1.    Use of equation of state
  2.    Fugacity co-efficient
  3.    Activity co-efficient
  4.    None of these
 Discuss Question
Answer: Option C. -> Activity co-efficient
Question 85. PH value of a solution containing equal concentration of hydroxyl and hydrogen ions will be
  1.    0
  2.    10
  3.    7
  4.    14
 Discuss Question
Answer: Option C. -> 7
Question 86. Pick out the wrong statement:
  1.    A vapor is termed as a saturated vapor, if its partial pressure equals its equilibrium vapor pressure
  2.    A vapor whose partial pressure is less than its equilibrium vapor pressure, is termed as a 'superheated vapor'
  3.    The temperature at which a vapor is saturated is termed as the boiling point
  4.    The difference between the existing temperature of a vapor and its saturation temperature (i.e. dew point) is called its 'degree of superheat'
 Discuss Question
Answer: Option C. -> The temperature at which a vapor is saturated is termed as the boiling point
Question 87. Atmospheric pressure corresponds to a hydrostatic head of
  1.    13.6 cms of Hg
  2.    34 ft ofH₂O
  3.    1 metre of H₂O
  4.    13.6 metres of Hg
 Discuss Question
Answer: Option B. -> 34 ft ofH₂O
Question 88. Which of the following ideal gas laws are not applicable to mixture of gases ?
  1.    Amgat's law
  2.    Dalton's law
  3.    Boyle's law & Charle's Law
  4.    None of these
 Discuss Question
Answer: Option C. -> Boyle's law & Charle's Law
Question 89. In __________ process, ions of salts react with water to produce acidity or alkalinity.
  1.    Hydration
  2.    Hydrolysis
  3.    Electrolysis
  4.    Dialysis
 Discuss Question
Answer: Option B. -> Hydrolysis
Question 90. Compressibility factor of a real gas is the ratio of the actual volume to that predicted by ideal gas law. As the pressure of the gas approaches zero, the compressibility factor approaches
  1.    ∞
  2.    0
  3.    1
  4.    0.24
 Discuss Question
Answer: Option C. -> 1

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