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MCQs

Total Questions : 1913 | Page 16 of 192 pages
Question 151. __________ fuels require the maximum percentage of 'excess air' for complete combustion.
  1.    Solid
  2.    Liquid
  3.    Gaseous
  4.    Nuclear
 Discuss Question
Answer: Option A. -> Solid
Question 152. Atomic __________ of an element is a whole number.
  1.    Weight
  2.    Number
  3.    Volume
  4.    Radius
 Discuss Question
Answer: Option B. -> Number
Question 153. A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal
  1.    Kinetic energy
  2.    Intermolecular forces of attraction
  3.    Potential energy
  4.    Total energy
 Discuss Question
Answer: Option A. -> Kinetic energy
Question 154. The vapour pressure of water is given by, in Psat = A - (5000/T), where A is a constant, Psat is the vapour pressure in atm. and T is the temperature in K.The vapor pressure of water in atm. at 50°C is approximately
  1.    0.07
  2.    0.09
  3.    0.11
  4.    0.13
 Discuss Question
Answer: Option D. -> 0.13
Question 155. An equation for calculating vapour pressure is given by, log10 P = A - B(t + c). This is called the
  1.    Kistyakowsky equation
  2.    Antonic equation
  3.    Kopp's rule
  4.    Trouton's rule
 Discuss Question
Answer: Option B. -> Antonic equation
Question 156. The combustion equations of carbon and carbon monoxide are as follows:C + O₂ = CO₂, ΔH = - 394 kJ/kg . mole CO + 1/2 O₂ = CO₂, ΔH = - 284.5 kJ/kg. mole. The heat of formation of CO is __________ kJ/kg. mole.
  1.    -109.5
  2.    +109.5
  3.    +180
  4.    +100
 Discuss Question
Answer: Option A. -> -109.5
Question 157. In case of a ternery system involving two liquid components and a solute, the ratio of the concentration of the solute in the two phases at equilibrium is called the distribution co-efficient. The distribution co-efficient depends upon the
  1.    Solute concentration
  2.    Temperature
  3.    Both A & B
  4.    Neither A nor B
 Discuss Question
Answer: Option C. -> Both A & B
Question 158. Density of carbon dioxide is __________ kg/Nm³.
  1.    44/22400
  2.    44/22.4
  3.    22.4/44
  4.    None of these
 Discuss Question
Answer: Option B. -> 44/22.4
Question 159. Enthalpy change resulting, when unit mass of solid is wetted with sufficient liquid, so that further addition of liquid produces no additional thermal effect, is called the heat of
  1.    Mixing
  2.    Adsorption
  3.    Wetting
  4.    Complete wetting
 Discuss Question
Answer: Option D. -> Complete wetting
Question 160. The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the
  1.    Trouton's rule
  2.    Kopp's rule
  3.    Antonie equation
  4.    Kistyakowsky equation
 Discuss Question
Answer: Option B. -> Kopp's rule

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