1. The equilibria relations in a inulticom—ponent and multiphase system can not
be calculated with the help of the
o experimental data
o emperical equations
o phase rule
o theoretical equations
Ans: C
2. 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
o recycling
o purging
o bypassing
o recirculation
Ans: B
3. An azeotropic solution of two liquids has boiling point lower than either of them, when it
o is saturated
o is unsaturated
o shows positive deviation from Raoult’s law
o shows negative deviation from Raoult’s law
Ans: C
4. 2 litres of nitrogen at N.T.P. weighs gms
o 1.25
o 2.5
o 14
0 28
Ans: B
5. What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-x lene at 100°C, if their vapor pressures at ioo°C are 1340, 560 and 210 mmHg respectively?
o 756.2
o 780.5
o 8o1.5
o 880.5
Ans: B
6. In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubiity is
o unchanged by the pressure change
o increased with the increase in pressure
o decreased with the increase in pressure
o independent of the temperature
Ans: C
7. Pick out the wrong statement:
o A vapor whose partial pressure is kss than its equilibrium vapor pressure, is termed as a superheated vapor
o The temperature at which a vapor is saturated is termed as the boiling point
o A vapor is termed as a saturated vapor, if its partial pressure equals its equilibrium vapor pressure
o The difference between the existing temperature of a vapor and its saturation temperature (i.e. dew point) is called its ‘degree of superheat’
Ans: B
8. If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will
o increase four times
o be reduced to 1/4th
o increase two times
o none of these
Ans:
9. A vapor whose partial pressure is less than its equilibrium vapor pressure is called a ________ vapor
o supersaturated
o saturated
o superheated
o none of these
Ans: C
10. In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality?
o Activity co-efficient
o Fugacity co-efficient
o Use of equation of state
o None of these
Ans" A
be calculated with the help of the
o experimental data
o emperical equations
o phase rule
o theoretical equations
Ans: C
2. 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
o recycling
o purging
o bypassing
o recirculation
Ans: B
3. An azeotropic solution of two liquids has boiling point lower than either of them, when it
o is saturated
o is unsaturated
o shows positive deviation from Raoult’s law
o shows negative deviation from Raoult’s law
Ans: C
4. 2 litres of nitrogen at N.T.P. weighs gms
o 1.25
o 2.5
o 14
0 28
Ans: B
5. What is the total pressure exerted by a mixture of 0.45 kg mole of benzene, 0.44 kg mole of toluene and 0.23 kg mole of o-x lene at 100°C, if their vapor pressures at ioo°C are 1340, 560 and 210 mmHg respectively?
o 756.2
o 780.5
o 8o1.5
o 880.5
Ans: B
6. In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubiity is
o unchanged by the pressure change
o increased with the increase in pressure
o decreased with the increase in pressure
o independent of the temperature
Ans: C
7. Pick out the wrong statement:
o A vapor whose partial pressure is kss than its equilibrium vapor pressure, is termed as a superheated vapor
o The temperature at which a vapor is saturated is termed as the boiling point
o A vapor is termed as a saturated vapor, if its partial pressure equals its equilibrium vapor pressure
o The difference between the existing temperature of a vapor and its saturation temperature (i.e. dew point) is called its ‘degree of superheat’
Ans: B
8. If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will
o increase four times
o be reduced to 1/4th
o increase two times
o none of these
Ans:
9. A vapor whose partial pressure is less than its equilibrium vapor pressure is called a ________ vapor
o supersaturated
o saturated
o superheated
o none of these
Ans: C
10. In case of vapor-liquid equilibria, which of the following does not account for gas phase deviation from ideality?
o Activity co-efficient
o Fugacity co-efficient
o Use of equation of state
o None of these
Ans" A
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