Internal energy is independent of the __________ for an ideal gas.
A. Pressure
B. Volume
C. Both A & B
D. Neither A nor B
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Viscosity of atmospheric air may be about __________ centipoise.
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Solutions having the same osmotic pressure are called __________ solutions.
A. Dilute
B. Ideal
C. Isotonic
D. Saturated
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In general, the specific heats of aqueous solutions __________ with increase in the concentration of the solute.
A. Increase
B. Decrease
C. Remain unchanged
D. None of these
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Pick out the wrong conversion formula for the conversion of weight units :
A. 1 tonne = 1000 kg = 22.046 lbs
B. 1 U.S. ton = 907 kg = 0.907 tonne = 0.893 ton
C. 1 ton = 2240 lbs = 1016 kg = 1.016 tonnes = 1.12 U.S. tons
D. None of these
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The amount of Zn (atomic weight = 65) required to form 224 c.c. of H2 at N.T.P. on treatment with dilute H2 SO4 will be __________ gm.
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With rise in temperature, the heat capacity of a substance
A. Increases
B. Decreases
C. Remains unchanged
D. Either A or B; depends on the substance
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Measurement of the amount of dry gas collected over water from volume of moist gas is based on the
A. Charle's law
B. Dalton's law of partial pressures
C. Avogadro's hypothesis
D. Boyle's law
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Pick out the wrong statement about the recycle stream in a process.
A. Recycling in a process stream helps in utilising the valuable reactants to the maximum with minimum loss of reactants
B. The ratio of the quantity of a reactant present in the reactor feed of a recycling operation to the quantity of the same reactant entering the process as fresh feed is called combined feed ratio
C. Recycling in a process does not help in getting higher extent of reaction
D. Recycling is exemplified by refluxing back a part of the distillate to the distillation column to maintain the quantity of liquid within the column
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In a chemical process, the recycle stream is purged for
A. Increasing the product yield
B. Enriching the product
C. Limiting the inerts
D. Heat conservation
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Osmotic pressure of the solution can be increased by
A. Decreasing its temperature
B. Increasing the volume of the vessel containing the solution
C. Diluting the solution
D. None of these
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The net heat evolved or absorbed in a chemical process, i.e. total change in the enthalpy of the system is independent of the
A. Temperature & pressure
B. Number of intermediate chemical reactions involved
C. State of aggregation & the state of combination at the beginning & the end of the reaction
D. None of these
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Pick out the wrong statement.
A. To make 100 kg of a solution containing 40% salt by mixing solution A (containing 25% salt) and solution B (containing 50% salt), the amount of solution A required is 40 kg
B. 1.2 gm atoms of carbon and 1.5 gm moles of oxygen are reacted to give 1 gm mole of carbon dioxide. The limiting reactant is carbon. The percent excess reactant supplied is 25
C. A gas bubble at a pressure of Pg is passed through a solvent with a saturation vapour pressure of Ps . If the time of passage of the bubble is long and air is insoluble in the solvent, the mole fraction of solvent in the bubble will be equal to P g P s
D. A supersaturated solution of a sparingly soluble solute, at a concentration of C, is being fed to a crystalliser at a volumetric flow rate of V. The solubility of the solute is C1 . The output rate of solids from an efficient crystalliser is (C + C1 )V
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The unit of dynamic viscosity is
A. Stoke
B. Poise
C. Gm/cm sec
D. Both B & C
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A gas mixture contains 6 moles of H2 and 2 moles of N2 . If the total pressure of the gaseous mixture is 4 kgf/cm2 ; then the partial pressure of N2 in the mixture will be __________ kgf/cm2 .
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The heat capacity of a substance is
A. Greater for liquid state than for solid state
B. Lower for liquid state than for gaseous state
C. Higher for solid state than for liquid state
D. Equal for solid and liquid states below melting point
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A rigid vessel containing three moles of nitrogen gas at 30°C is heated to 250°C. Assume the average capacities of nitrogen to be Cp = 29.1 J/mole.°C and, Cv = 20.8 J/mole.°C. The heat required, neglecting the heat capacity of the vessel, is
A. 13728 J
B. 19206 J
C. 4576 J
D. 12712 J
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__________ kg of CaCO3 on heating will give 56 kg of CaO.
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The temperature at which real gases obey the ideal gas law over a wide range of pressure is called the __________ temperature.
A. Reduced
B. Boyle
C. Critical
D. Inversion
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The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be
A. Basic
B. More acidic
C. Neutral
D. Of the same acidity
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