A. 0.00
B. 0.18
C. 0.24
D. 1.00
Related Mcqs:
- Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is________________?
A. 20
B. 32.2
C. 45.35
D. 58.65 - The weight fraction of methanol in an aqueous solution is 0.64. The mole fraction of methanol XM satisfies________________?
A. XM < 0.5
B. XM = 0.5
C. 0.5 < XM < 0.64
D. XM ≥ 0.64 - The density of a gas ‘X’ is twice that of another gas ‘Y’. If the molecular weight of gas ‘Y’ is ‘M’; then the molecular weight of the gas ‘X’ will be________________?
A. 2M
B. M/2
C. M
D. M/4 - Diffusion is that property by virtue of which a perfume bottle when opened up in a room, makes the whole room fragrant with its smell. If a perfume ‘X’ diffuses twice as fast as another perfume ‘Y’; what is the molecular weight of ‘Y’, if the vapor density of gas ‘X’ is 2? Molecular weight of gas ‘X’ is to be assumed to be 2 ?
A. 2
B. 4
C. 8
D. 16 - A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are Xc and Xs respectively. Which of the following statement is correct ?
A. Xc > Xs
B. Xc = Xs
C. Xc < Xs
D. Xc greater/less than Xs depending on the length of the cylinder - The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg ?
A. 0.2
B. 0.1
C. 0.4
D. 0.6 - An aqueous solution of 2.45% by weight H2SO4 has a specific gravity of 1.011. The composition expressed in normality is______________?
A. 0.2500
B. 0.2528
C. 0.5000
D. 0.5055 - 1 gm mole of an alcohol whose molecular weight is 74 contains 48 gms of carbon, 10 gms of hydrogen and 16 gms of oxygen. Its molecular formula is__________________?
A. C4H9OH
B. C3H21OH
C. (C2H4)2H2.OH
D. C2H33OH - Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pv B and pv w respectively. The partial pressure of benzene in air-vapour mixture is_________________?
A. PvB
B. xB.PvB
C. (Patm – Pvw)xB
D. xB.Patm - A car tyre of volume 0.057 m3 is inflated to 300 kPa at 300 K. After the car is driven for 10 hours, the pressure in the tyre increases to 330 kPa. Assume air is an ideal gas and Cv for air is 21 J/mole.K. The change in the internal energy of air in the tyre in J/mole is__________________?
A. 380
B. 630
C. 760
D. 880
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