1) The unit of dynamic viscosity is_________________? a. Stoke b. Poise c. gm/cm sec d. Both B. & C.
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2) Unit of power is____________________? a. Joule b. Watt c. Joule/Second d. Both B. & C.
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3) 1 kg/m2 is equal to ______________ mm water column? a. 1 b. 10 c. 100 d. 1000
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4) Except for monatomic gases, the molal heat capacity at constant volume for all gases is _____________ Kcal/Kg mole.° K? a. 3 b. > 3 c. < 3 d. < 1
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5) The crystallisation of a solute from a solution may be done by________________? a. Removal of pure solvent by evaporation b. Change of temperature thereby causing super-saturation c. Changing the nature of the system by the addition of a more soluble material d. All A., B. & C.
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6) Boiling point of a non-homogeneous mixture of immiscible liquids is _____________ that of any one of its separate components? a. Lower than b. Higher than c. Equal to d. Either A. or B.; depends on the liquids
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7) The vapour pressure of a solution (made by dissolving a solute in a solvent) is ____________ that of the pure solvent? a. Less than b. More than c. Equal to d. Either more or less; depends on the solvent
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8) At what temperature, given mass of a gas that occupies a volume of 2 litres at N.T.P. will occupy a volume of 4 litres, if the pressure of the gas is kept constant ? a. 273°C b. 273°K c. 100°C d. 200°C
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9) 2 litres of nitrogen at N.T.P. weighs ______________ gms ? a. 14 b. 2.5 c. 28 d. 1.25
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10) Heat of reaction is a function of the___________________? a. Pressure b. Temperature c. Both A. & B. d. Neither A. nor B.
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11) The average translational kinetic energy with which a gas molecule is endowed is dependent on its__________________? a. Nature b. Size c. Absolute temperature d. All A., B. & C.
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12) Sometimes, in chemical processes, a part of the outlet stream is rejected as waste in order to keep the impurity level in the system within limits. This phenomenon is termed as the_________________? a. Recycling b. Purging c. Bypassing d. Recirculation
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13) The vapor pressure of liquids (having similar chemical nature) at any specified temperature ______________ with increasing molecular weight? a. Increases b. Decreases c. Remains unchanged d. Increases linearly
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14) Enthalpy of a vapor gas mixture may be increased by increasing the________________? a. Temperature at constant humidity b. Humidity at constant temperature c. Temperature and the humidity d. All A., B. & C.
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15) During a phase change process like sublimation, vaporisation, melting etc., the specific ____________ does not change? a. Enthalpy b. Gibbs free energy c. Internal energy d. Entropy
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16) The maximum adiabatic flame temperature of fuels in air is ____________ the maximum flame temperature in pure oxygen? a. Lower than b. Higher than c. Same as d. Not related to
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17) A vessel of volume 1000 m3 contains air which is saturated with water vapour. The total pressure and temperature are 100 kPa and 20°C respectively. Assuming that the vapour pressure of water at 20°C is 2.34 kPa, the amount of water vapour (in kg) in the vessel is approximately ? a. 17 b. 20 c. 25 d. 34
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18) Kinematic viscosity of 1 m2 /second is equivalent to _____________ stokes? a. 10 b. 102 c. 103 d. 104
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19) For water evaporating into unsaturated air under adiabatic conditions and at constant pressure, the ____________ remains constant throughout the period of vaporisation ? a. Dry bulb temperature b. Wet bulb temperature c. Humidity d. Relative saturation
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20) At higher temperature, molal heat capacities of most of the gases (at constant pressure) ____________ with increase in temperature? a. Increases b. Decreases c. Remains unchanged d. Increases linearly
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