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Variation of vapor pressure with temperature can be calculated using ClausiusClapeyron equation, which assumes that the  
A.  vapor follows the ideal gas law. [Wrong Answer] 
B.  molal latent heat of vaporisation is constant within the limited temperature range. [Wrong Answer] 
C.  volume in the liquid state is negligible compared with that in the vapor state. [Wrong Answer] 
D.  all (a), (b) & (c). [Correct Answer] 
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Explanation:
Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result 
Also Read Similar Questions Below :
⇒ Which of the following is insensitive to changes in pressure ?
Heat of vaporisation
Melting point
Heat of fusion
Both (b) and (c)
⇒ Real gases approach ideal behaviour at
high pressure & high temperature.
low pressure & high temperature.
high pressure & low temperature.
low pressure & low temperature.
⇒ Molar heat capacity of water in equilibrium with ice at constant pressure is
0
∞
1
none of these
⇒ In physical adsorption, as compared to chemisorption, the
quantity adsorbed per unit mass is higher.
rate of adsorption is controlled by the resistance to surface reaction.
activation energy is very high.
heat of adsorption is very large.
⇒ One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m^{3}. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m^{3}. The amount of water vapour condensed (in kg) is
0
0.065
0.1
1
⇒ Volume occupied by one gm mole of a gas at S.T.P. is
22.4 litres
22400 litres
22.4 c.c
359 litres
⇒ Boiling point of a nonhomogeneous mixture of immiscible liquids is __________ that of any one of its separate components.
lower than
higher than
equal to
either (a) or (b); depends on the liquids
⇒ Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because
the strong base and strong acid reacts completely.
the salt formed does not hydrolyse.
only OH^{} and H^{+} ions react in every case.
the strong base and strong acid reacts in aqueous solution.
⇒ Heat of neutralisation of HCl and NaOH is  57.46 kJ/Kg mole. The heat of ionisation of water will be __________ kJ/Kg mole.
57.46
57.46
114.92
28.73
⇒ Osmotic pressure of the solution can be increased by
decreasing its temperature.
increasing the volume of the vessel containing the solution.
diluting the solution.
none of these.
⇒ Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity ? Vapour pressure of water at 20°C is 17.5 mm Hg.
80.38
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79.62
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⇒ The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.
6680
13360
2481
97302
⇒ A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.
saturated
superheated
unsaturated
dry gaseous
⇒ If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will
be reduced to l/4th.
increase four times.
increase two times.
none of these.
⇒ On addition of 1 c.c. of dilute hydrochloric acid (1% concentration) to 80 c.c. of a buffer solution of pH = 4, the pH of the solution becomes
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⇒ Pick out the wrong unit conversion.
1 J = 1 W.Second = 10^{7} ergs = 9.5 x 10^{4} BTU = 0.2389 calorie
1 Watt = 746 hp


⇒ Dry air is a mixture of
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gases
both (a) & (b)
neither (a) nor (b)
⇒ The vapor pressure of liquids (having similar chemical nature) at any specified temperature __________ with increasing molecular weight.
increases
decreases
remains unchanged
increases linearly
⇒ How much O_{2} can be obtained from 90 kg of water ?
32 kg
80 kg
64 kg
90 kg
⇒ N_{2} content in a urea sample was found to be only 42%. What is the actual urea content of the sample ? (molecular weight of urea = 60)
0.8
0.9
0.95
0.98
⇒ In case of vaporliquid equilibria, which of the following does not account for gas phase deviation from ideality?
Use of equation of state
Fugacity coefficient
Activity coefficient
None of these
⇒ The activity coefficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour
measures the elevation in boiling point.
is not dependent on the temperature.
is a function of the liquid phase composition.
measures the depression in freezing point.
⇒ Number of gm moles of solute dissolved in one litre of a solution is called its
equivalent weight
molarity
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⇒ __________ fuels require the maximum percentage of 'excess air' for complete combustion.
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⇒ A bypass stream in a chemical process is useful, because it
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improves the conversion.
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⇒ 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
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M/4
⇒ One micron is equal to __________ cm.
10^{2}
10^{4}
10^{6}
10^{8}
⇒ 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
nature of the liquid.
nature of the gas.
temperature of the liquid. id) total pressure.
⇒ For a reacation, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is
0
1
2
3
⇒ 1 kg of calcium carbide (CaC_{2}) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour ?
5
10
15
20
⇒ Which of the following is insensitive to changes in pressure ?
Heat of vaporisation
Melting point
Heat of fusion
Both (b) and (c)
⇒ Real gases approach ideal behaviour at
high pressure & high temperature.
low pressure & high temperature.
high pressure & low temperature.
low pressure & low temperature.
⇒ Molar heat capacity of water in equilibrium with ice at constant pressure is
0
∞
1
none of these
⇒ In physical adsorption, as compared to chemisorption, the
quantity adsorbed per unit mass is higher.
rate of adsorption is controlled by the resistance to surface reaction.
activation energy is very high.
heat of adsorption is very large.
⇒ One kg of saturated steam at 100°C and 1.01325 bar is contained in a rigid walled vessel. It lias a volume of 1.673 m^{3}. It cools to 98°C ; the saturation pressure is 0.943 bar ; one kg of water vapour under these conditions has a volume of 1.789 m^{3}. The amount of water vapour condensed (in kg) is
0
0.065
0.1
1
⇒ Volume occupied by one gm mole of a gas at S.T.P. is
22.4 litres
22400 litres
22.4 c.c
359 litres
⇒ Boiling point of a nonhomogeneous mixture of immiscible liquids is __________ that of any one of its separate components.
lower than
higher than
equal to
either (a) or (b); depends on the liquids
⇒ Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because
the strong base and strong acid reacts completely.
the salt formed does not hydrolyse.
only OH^{} and H^{+} ions react in every case.
the strong base and strong acid reacts in aqueous solution.
⇒ Heat of neutralisation of HCl and NaOH is  57.46 kJ/Kg mole. The heat of ionisation of water will be __________ kJ/Kg mole.
57.46
57.46
114.92
28.73
⇒ Osmotic pressure of the solution can be increased by
decreasing its temperature.
increasing the volume of the vessel containing the solution.
diluting the solution.
none of these.
⇒ Air at a temperature of 20°C and 750 mm Hg pressure has a relative humidity of 80%. What is its percentage humidity ? Vapour pressure of water at 20°C is 17.5 mm Hg.
80.38
80
79.62
78.51
⇒ The average value of heat of neutralisation of dilute solution of strong acids and strong bases is about __________ kcal/kg.mole of water formed.
6680
13360
2481
97302
⇒ A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.
saturated
superheated
unsaturated
dry gaseous
⇒ If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will
be reduced to l/4th.
increase four times.
increase two times.
none of these.
⇒ On addition of 1 c.c. of dilute hydrochloric acid (1% concentration) to 80 c.c. of a buffer solution of pH = 4, the pH of the solution becomes
1
8
4
2
⇒ Pick out the wrong unit conversion.
1 J = 1 W.Second = 10^{7} ergs = 9.5 x 10^{4} BTU = 0.2389 calorie
1 Watt = 746 hp


⇒ Dry air is a mixture of
vapors
gases
both (a) & (b)
neither (a) nor (b)
⇒ The vapor pressure of liquids (having similar chemical nature) at any specified temperature __________ with increasing molecular weight.
increases
decreases
remains unchanged
increases linearly
⇒ How much O_{2} can be obtained from 90 kg of water ?
32 kg
80 kg
64 kg
90 kg
⇒ N_{2} content in a urea sample was found to be only 42%. What is the actual urea content of the sample ? (molecular weight of urea = 60)
0.8
0.9
0.95
0.98
⇒ In case of vaporliquid equilibria, which of the following does not account for gas phase deviation from ideality?
Use of equation of state
Fugacity coefficient
Activity coefficient
None of these
⇒ The activity coefficient of a solution, which accounts for the departure of liquid phase from ideal solution behaviour
measures the elevation in boiling point.
is not dependent on the temperature.
is a function of the liquid phase composition.
measures the depression in freezing point.
⇒ Number of gm moles of solute dissolved in one litre of a solution is called its
equivalent weight
molarity
molality
normality
⇒ __________ fuels require the maximum percentage of 'excess air' for complete combustion.
Solid
Liquid
Gaseous
Nuclear
⇒ A bypass stream in a chemical process is useful, because it
facilitates better control of the process.
improves the conversion.
increases the yield of products.
none of these.
⇒ 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
2M
M/2
M
M/4
⇒ One micron is equal to __________ cm.
10^{2}
10^{4}
10^{6}
10^{8}
⇒ 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
nature of the liquid.
nature of the gas.
temperature of the liquid. id) total pressure.
⇒ For a reacation, X → Y, if the concentration of 'X' is tripled; the rate becomes nine times. The order of reaction is
0
1
2
3
⇒ 1 kg of calcium carbide (CaC_{2}) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour ?
5
10
15
20