The density of a gas at N.T.P.is 'ρ'. Keeping the pressure constant (i.e. 760 mm Hg), the 3 density of the gas will become ¾ 0.75ρ at a temperature of __________ °K
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An oxidation process is accompanied by decrease in the
A. Number of electrons
B. Oxidation number
C. Number of ions
D. All of the above
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1 torr is equal to __________ mm Hg column.
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Viscosity of 1 centipoise is equal to 1 centis-toke in case of
A. Water
B. Mercury
C. Carbon tetrachloride
D. None of these
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Pick out the wrong statement.
A. One kg-mole of an ideal gas occupies 22.4 m3 at N.T.P
B. One lb-mole of an ideal gas occupies 359 ft3 at N.T.P
C. One gm-mole of an ideal gas occupies 22.4 litres (i.e., 22400 c.c) at N.T.P
D. Density of dry air at N.T.P. is 1 gm/litre
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Cv for monoatomic gases is equal to(where, R = gas constant)
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The equilibria relations in a multicom-ponent and multiphase system can not be calculated with the help of the
A. Phase rule
B. Experimental data
C. Emperical equations
D. Theoretical equations
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Solutions which distil without change in composition are called
A. Ideal
B. Saturated
C. Supersaturated
D. Azeotropic
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A saturated vapor on being compressed would
A. Condense
B. Form wet steam
C. Both A & B
D. Neither A nor B
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One of the specific gravity scales is "Brix" (used speicifically for sugar solution). It is defined as
A. Brix = (400/G) - 400
B. Brix = 200 (G-1)
C. Brix = 145 - (145/G)
D. None of these
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Elements in a periodic table are arranged in order of their
A. Atomic number
B. Mass number
C. Atomic weight
D. Metallic characteristics
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For an ideal gas, the compressibility factor
A. Decreases with pressure rise
B. Is unity at all temperature
C. Is unity at Boyle's temperature
D. Zero
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The effect of pressure on the heat capacity of the gases __________ is negligible.
A. At pressure below one atmosphere
B. Below the critical temperature
C. Both A & B
D. Neither A nor B
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Gases diffuse faster compared to liquids because of the reason that the liquid molecules
A. Are held together by stronger inter-molecular forces
B. Move faster
C. Have no definite shape
D. Are heavier
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The percentage ratio of the partial pressure of the vapor to the vapor pressure of the liquid at the existing temperature is
A. Termed as relative saturation
B. Not a function of the composition of gas mixture
C. Called percentage saturation
D. Not a function of the nature of vapor
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The gravimetric (i.e., by weight) composition of a vapor saturated gas is independent of the
A. Nature of both the gas & the liquid
B. Temperature
C. Total pressure
D. None of these
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Assuming applicability of ideal gas law, the pure component volume of the vapor in a saturated gas can be calculated from theoretical relationship. The volumetric composition of a vapor saturated gas is independent of the
A. Nature of the liquid
B. Nature of the gas
C. Temperature of the liquid
D. Total pressure
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The heat capacity of most substances is greater for the __________ state.
A. Solid
B. Liquid
C. Gaseous
D. None of these
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Addition of a non-volatile solute to a pure solvent
A. Increases its freezing point
B. Increases its boiling point
C. Decreases its freezing point
D. Both B and C
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In the reaction, Ca + 2H2 O = Ca(OH)2 + H2 ; what volume (c.c.) of hydrogen at STP would be liberated, when 8 gm of calcium reacts with excess water? (atomic weight of calcium = 40)
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