Positive deviation from Raoult's law means a mixture whose total pressure is (A) Greater than that computed for ideality (B) Less than that computed for ideality

Positive deviation from Raoult's law means a mixture whose total
pressure is
(A) Greater than that computed for ideality
(B) Less than that computed for ideality
by

1 Answer

Answer :

(A) Greater than that computed for ideality
by

Related questions

Fenske equation for determining the minimum number of theoretical stages in distillation column holds good, when the (A) Relative volatility is reasonably constant (B) Mixture (to be separated) shows negative deviation from ideality (C) Mixture (to be separated) shows positive deviation from ideality (D) Multi-component distillation is involved

Description : Fenske equation for determining the minimum number of theoretical stages in distillation column holds good, when the (A) Relative volatility is reasonably constant (B) Mixture (to be separated) ... (to be separated) shows positive deviation from ideality (D) Multi-component distillation is involved

Last Answer : (A) Relative volatility is reasonably constant

Pick out the wrong statement. (A) The mole fraction of solute is directly proportional to the molality of a 'dilute' solution (B) For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is nonlinear in the case of steady state unimolal unidirectional diffusion (C) Azeotropes obey Raoult's law at all temperature (D) The relative volatility of a binary mixture at the Azeotropic composition is 1

Description : Pick out the wrong statement. (A) The mole fraction of solute is directly proportional to the molality of a 'dilute' solution (B) For a non-reacting binary mixture of ideal gases, the partial ... at all temperature (D) The relative volatility of a binary mixture at the Azeotropic composition is 1

Last Answer : (C) Azeotropes obey Raoult's law at all temperature

Relative volatility varies with the concentration of component for an ideal solution. The relative volatility of a binary mixture may be defined as the ratio of vapor pressure of component 'A' to that of component 'B', when (A) Only vapor phase follows Raoult's law (B) Only liquid phase obeys Dalton's law (C) Liquid phase obeys Dalton's law and vapor phase obeys Raoult's law (D) Vapor phase obeys Dalton's law and liquid phase obeys Raoult's law

Description : Relative volatility varies with the concentration of component for an ideal solution. The relative volatility of a binary mixture may be defined as the ratio of vapor pressure of component 'A' to that of ... law (D) Vapor phase obeys Dalton's law and liquid phase obeys Raoult's law

Last Answer : (D) Vapor phase obeys Dalton's law and liquid phase obeys Raoult's law

One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult's law is obeyed, then changing the feed composition would effect (A) The product composition but not the fraction vaporised (B) The product composition as well as the fraction vaporised (C) The fraction vaporised but not the product composition (D) Neither the product composition nor the fraction vaporised

Description : One mole feed of a binary mixture of a given composition is flash vaporised at a fixed P and T. If Raoult's law is obeyed, then changing the feed composition would effect (A) ... The fraction vaporised but not the product composition (D) Neither the product composition nor the fraction vaporised

Last Answer : (C) The fraction vaporised but not the product composition

Raoult's law is applicable to the (A) Ideal solutions (B) Real solutions (C) Mixture of water and alcohol

Description : Raoult's law is applicable to the (A) Ideal solutions (B) Real solutions (C) Mixture of water and alcohol

Last Answer : (A) Ideal solutions

Pick out the wrong statement. (A) An ideal liquid or solid solution is defined as one in which each component obeys Raoult's law (B) If Raoult's law is applied to one component of a binary mixture; Henry's law or Raoult's law is applied to the other component also (C) Henry's law is rigorously correct in the limit of infinite dilution (D) None of these

Description : Pick out the wrong statement. (A) An ideal liquid or solid solution is defined as one in which each component obeys Raoult's law (B) If Raoult's law is applied to one component of a binary mixture; ... also (C) Henry's law is rigorously correct in the limit of infinite dilution (D) None of these

Last Answer : (D) None of these

When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of (A) Vapour pressure of component A to that of component B (B) Vapour pressure of component A to the total pressure (C) Vapour pressure of component A to the partial pressure of A (D) Partial pressure of component A to the total pressure

Description : When the liquid phase and vapour phase of a binary system obeys Raoult's and Dalton's law respectively, the relative volatility is the ratio of (A) Vapour pressure of component A to that of ... to the partial pressure of A (D) Partial pressure of component A to the total pressure

Last Answer : (A) Vapour pressure of component A to that of component B

What is the name given to the equation PV=nRT? w) law of partial pressure x) ideal gas equation y) quadratic equation z) Raoult's equation

Description : What is the name given to the equation PV=nRT? w) law of partial pressure x) ideal gas equation y) quadratic equation z) Raoult's equation

Last Answer : ANSWER: X -- IDEAL GAS EQUATION

Raoult's law applies to the (A) All liquid solutions (B) Non-ideal solution only (C) Non-volatile solute (D) Solvents

Description : Raoult's law applies to the (A) All liquid solutions (B) Non-ideal solution only (C) Non-volatile solute (D) Solvents

Last Answer : (D) Solvents

Which of the following solutions will follow Raoult's law most closely? (A) A solution of benzene, toluene and o-xylene (B) 35% solution of camphor in water (C) 35% solution of NH3 in water (D) A solution of polar organic compounds (not of homologue of a series)

Description : Which of the following solutions will follow Raoult's law most closely? (A) A solution of benzene, toluene and o-xylene (B) 35% solution of camphor in water (C) 35% solution of NH3 in water (D) A solution of polar organic compounds (not of homologue of a series)

Last Answer : (A) A solution of benzene, toluene and o-xylene

Pick out the wrong statement. Raoult's law does not apply, when the (A) Size of component molecules are not equal (B) Attractive forces between like and unlike molecules in the solution are approximately equal (C) Component molecules are non-polar (D) Chemical combination or molecular association between unlike molecules takes place in the formation of solution

Description : Pick out the wrong statement. Raoult's law does not apply, when the (A) Size of component molecules are not equal (B) Attractive forces between like and unlike molecules ... D) Chemical combination or molecular association between unlike molecules takes place in the formation of solution

Last Answer : (C) Component molecules are non-polar

According to Dalton’s law, the total pres sure of the mixture of gases is equal to  (a) greater of the partial pressures of all  (b) average of the partial pressures of all  (c) sum of the partial pressures of all  (d) sum of the partial pressures of all divided by average molecular weight  (e) atmospheric pressure.

Description : According to Dalton's law, the total pres sure of the mixture of gases is equal to  (a) greater of the partial pressures of all  (b) average of the partial pressures of all  (c) sum ... all  (d) sum of the partial pressures of all divided by average molecular weight  (e) atmospheric pressure.

Last Answer : Answer : c

Diffusivity in concentrated solutions differs from that in dilute solutions, because of the changes in (A) Viscosity with concentration (B) Degree of ideality of the solution (C) Both (A) and (B) (D) Neither (A) nor (B)

Description : Diffusivity in concentrated solutions differs from that in dilute solutions, because of the changes in (A) Viscosity with concentration (B) Degree of ideality of the solution (C) Both (A) and (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) and (B)

Diffusion in concentrated solutions differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution. (A) Degree of ideality (B) Viscosity (C) Both 'a '& 'b' (D) Neither 'a' nor 'b'

Description : Diffusion in concentrated solutions differs from that in dilute solutions, because of the change in the __________ with the concentration of the solution. (A) Degree of ideality (B) Viscosity (C) Both 'a '& 'b' (D) Neither 'a' nor 'b'

Last Answer : (C) Both 'a '& 'b

What are non-ideal solutions? Explain as to why non-ideal solutions deviate from Raoult’s Law.

Description : What are non-ideal solutions? Explain as to why non-ideal solutions deviate from Raoult’s Law.

Last Answer : Ans:- Non ideal solution are those which do not obey Raoult’s law. When the molecular interaction between solute molecules solvent. Solvent molecules is not same as the molecular interaction between solute & solvent molecules then deviotion occurs.

State Raoult’s Law for a binary solution containing volatile components.

Description : State Raoult’s Law for a binary solution containing volatile components.

Last Answer : Ans:- At a particular temperature the partial vapour pressure of each component of a solution containing volatile liquid is directly propositional to its mole fraction.

As per IS:456, the strength of concrete sample is less than [ A ] The characteristic strength minus 1.35times the standard deviation [ B ] 0.80 times the characteristic strength [ C ] Greater of (a) and (b) [ D ] None of the above

Description : As per IS:456, the strength of concrete sample is less than [ A ] The characteristic strength minus 1.35times the standard deviation [ B ] 0.80 times the characteristic strength [ C ] Greater of (a) and (b) [ D ] None of the above

Last Answer : [ C ] Greater of (a) and (b)

When do real gases deviate from ideality?

Description : When do real gases deviate from ideality?

Last Answer : Ans. At high pressure and low temperature.

Net positive suction head (NPSH) of a centrifugal pump must be (A) Greater than the vapour pressure of the liquid (B) Less than the vapour pressure of the liquid(C) Equal to the vapour pressure of the liquid(D) Less than barometric pressure

Description : Net positive suction head (NPSH) of a centrifugal pump must be (A) Greater than the vapour pressure of the liquid (B) Less than the vapour pressure of the liquid (C) Equal to the vapour pressure of the liquid (D) Less than barometric pressure

Last Answer : (A) Greater than the vapour pressure of the liquid

“The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture". This is (A) The statement as per Gibbs-Helmholtz (B) Called Lewis-Randall rule (C) Henry's law (D) None of these

Description : “The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture". This is (A) The statement as per Gibbs-Helmholtz (B) Called Lewis-Randall rule (C) Henry's law (D) None of these

Last Answer : (B) Called Lewis-Randall rule

It cannot be determined from Gauss law, whereas the remaining options can be computed from Gauss law. 10. Gauss law for magnetic fields is given by a) Div(E) = 0 b) Div(B) = 0 c) Div(H) = 0 d) Div(D) = 0

Description : It cannot be determined from Gauss law, whereas the remaining options can be computed from Gauss law. 10. Gauss law for magnetic fields is given by a) Div(E) = 0 b) Div(B) = 0 c) Div(H) = 0 d) Div(D) = 0

Last Answer : b) Div(B) = 0

The force acting between two point charges can be computed using which of the following laws? w) Ohm's Law x) Ampere's Law y) Coulomb's Law z) Newton's Second Law.

Description : The force acting between two point charges can be computed using which of the following laws? w) Ohm's Law x) Ampere's Law y) Coulomb's Law z) Newton's Second Law.

Last Answer : ANSWER: Y -- COULOMB'S LAW

An antenna “efficiency” is computed by using one of the following equations. A. Efficiency = (radiation resistance / transmission resistance) B. Efficiency = (total resistance / radiation resistance) x 100% C. Efficiency = (effective radiated power / transmitter output) x 100% D. Efficiency = (radiation resistance / total resistance) x 100%

Description : An antenna efficiency is computed by using one of the following equations. A. Efficiency = (radiation resistance / transmission resistance) B. Efficiency = (total resistance / radiation resistance) x ... / transmitter output) x 100% D. Efficiency = (radiation resistance / total resistance) x 100%

Last Answer : D. Efficiency = (radiation resistance / total resistance) x 100%

The total power in both series and parallel circuits is computed with the formula: PT = P1 + P2 + P3 +...Pn. Why can this formula be used for both series and parallel circuits?

Description : The total power in both series and parallel circuits is computed with the formula: PT = P1 + P2 + P3 +...Pn. Why can this formula be used for both series and parallel circuits?

Last Answer : In both cases all the power used in the circuit must come from the source.

Marginal cost is computed as A. Prime cost + All Variable overheads B. Direct material + Direct labour + Direct Expenses + All variable overheads C. Total costs – All fixed overheads D. All of the above

Description : Marginal cost is computed as A. Prime cost + All Variable overheads B. Direct material + Direct labour + Direct Expenses + All variable overheads C. Total costs – All fixed overheads D. All of the above

Last Answer : A. Prime cost + All Variable overheads

The VOR indications on an RMI whose deviation is not zero: a. Are magnetic b. Are compass c. Are relative d. Must have deviation applied before being used

Description : The VOR indications on an RMI whose deviation is not zero: a. Are magnetic b. Are compass c. Are relative d. Must have deviation applied before being used

Last Answer : a. Are magnetic

When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the (A) Partial pressure of water vapour is less than the total pressure (B) Humidity is < 100% & dew point temperature of air has not reached (C) Dew point temperature of air has not reached & air is not saturated fully (D) Air is fully saturated

Description : When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the (A) Partial pressure of water vapour is less than the total pressure (B) Humidity is < 100% & dew ... Dew point temperature of air has not reached & air is not saturated fully (D) Air is fully saturated

Last Answer : (D) Air is fully saturated

A gas shows deviation from ideal behaviour at (A) Low pressure and high temperature (B) Low pressure and low temperature (C) Low temperature and high pressure (D) High temperature and high pressure

Description : A gas shows deviation from ideal behaviour at (A) Low pressure and high temperature (B) Low pressure and low temperature (C) Low temperature and high pressure (D) High temperature and high pressure

Last Answer : (C) Low temperature and high pressure

For water-ethanol system, the minimum reflux ratio (A) Is computed from the slope of the upper operating line that is tangent to the equilibrium curve (B) Is computed from the intercept of the operating line (C) Cannot be computed (D) Is the optimum reflux ratio

Description : For water-ethanol system, the minimum reflux ratio (A) Is computed from the slope of the upper operating line that is tangent to the equilibrium curve (B) Is computed from the intercept of the operating line (C) Cannot be computed (D) Is the optimum reflux ratio

Last Answer : (A) Is computed from the slope of the upper operating line that is tangent to the equilibrium curve

Which of the following quantities are computed by using the hydraulic radius for non-circular ducts? (A) Velocity and relative roughness (B) Head loss and velocity (C) Reynold number, relative roughness and head loss (D) Reynolds number and friction factor

Description : Which of the following quantities are computed by using the hydraulic radius for non-circular ducts? (A) Velocity and relative roughness (B) Head loss and velocity (C) Reynold number, relative roughness and head loss (D) Reynolds number and friction factor

Last Answer : (C) Reynold number, relative roughness and head loss

Grams of butane (C4H10 ) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be (A) 580 (B) 640 (C) 1160 (D) Data insufficient; can't be computed

Description : Grams of butane (C4H10 ) formed by the liquefaction of 448 litres of the gas (measured at (STP) would be (A) 580 (B) 640 (C) 1160 (D) Data insufficient; can't be computed

Last Answer : (C) 1160

A cylinder contains 640 gm of liquid oxygen. The volume occupied (in litres) by the oxygen, when it is released and brought to standard conditions (0°C, 760 mm Hg) will be __________ litres. (A) 448 (B) 224 (C) 22.4 (D) Data insufficient; can't be computed

Description : A cylinder contains 640 gm of liquid oxygen. The volume occupied (in litres) by the oxygen, when it is released and brought to standard conditions (0°C, 760 mm Hg) will be __________ litres. (A) 448 (B) 224 (C) 22.4 (D) Data insufficient; can't be computed

Last Answer : (A) 448

In a large random data set following normal distribution, the ratio (%) of number of data points which are in the range of (mean ± standard deviation) to the total number of data points, is (A) ~ 50% (B) ~ 67% (C) ~ 97% (D) ~ 47%

Description : In a large random data set following normal distribution, the ratio (%) of number of data points which are in the range of (mean ± standard deviation) to the total number of data points, is (A) ~ 50% (B) ~ 67% (C) ~ 97% (D) ~ 47%

Last Answer : Answer: B

In Azeotropic mixture, the equilibrium vapour composition is (A) More than liquid composition (B) Less than liquid composition (C) Same as liquid composition (D) Independent of pressure

Description : In Azeotropic mixture, the equilibrium vapour composition is (A) More than liquid composition (B) Less than liquid composition (C) Same as liquid composition (D) Independent of pressure

Last Answer : (C) Same as liquid composition

Transmission lines when connected to antenna have A. capacitive load B. resistive load whose resistance is less than characteristics impedance C. resistive load at the resonant frequency D. resistive load whose resistance is greater than the characteristic impedance of the line

Description : Transmission lines when connected to antenna have A. capacitive load B. resistive load whose resistance is less than characteristics impedance C. resistive load at the resonant frequency D. resistive load whose resistance is greater than the characteristic impedance of the line

Last Answer : C. resistive load at the resonant frequency

__________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid. (A) Dew point (B) Bubble point (C) Dry bulb temperature (D) Wet bulb temperature

Description : __________ is the temperature at which a gas-vapor mixture becomes saturated, when cooled at constant total pressure out of contact with a liquid. (A) Dew point (B) Bubble point (C) Dry bulb temperature (D) Wet bulb temperature

Last Answer : (A) Dew point

At a fixed total pressure, humidity depends only on the (A) Partial pressure of vapour in the mixture (B) Heat capacity of the vapour (C) Density of the vapour (D) None of these

Description : At a fixed total pressure, humidity depends only on the (A) Partial pressure of vapour in the mixture (B) Heat capacity of the vapour (C) Density of the vapour (D) None of these

Last Answer : (A) Partial pressure of vapour in the mixture

An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively. The humidity of air sample expressed as kg of water vapour/kg of dry air is: (A) 0.048 (B) 0.079 (C) 0.122 (D) 0.152

Description : An air-water vapour mixture has a dry bulb temperature of 60°C and a dew point temperature of 40°C. The total pressure is 101.3 kPa and the vapour pressure of water at 40°C and 60°C are 7.30 kPa and 19.91 kPa respectively ... air is: (A) 0.048 (B) 0.079 (C) 0.122 (D) 0.152

Last Answer : (D) 0.152

Dew point of an air-water vapor mixture (A) Decreases with decrease in pressure (B) At constant humidity & total pressure is fixed (C) Corresponding to any point on the humidity chart is obtained by projecting a line through this point parallel to the temperature axis and to the saturation curve (D) All 'a', 'b' & 'c'

Description : Dew point of an air-water vapor mixture (A) Decreases with decrease in pressure (B) At constant humidity & total pressure is fixed (C) Corresponding to any point on the humidity chart is obtained by projecting a ... to the temperature axis and to the saturation curve (D) All 'a', 'b' & 'c'

Last Answer : (D) All 'a', 'b' & 'c'

The relative saturation of a partially saturated mixture of vapour and gas can be increased by __________ of the mixture. (A) Reducing the total pressure (B) Increasing the total pressure (C) Reducing the temperature (D) Both (B) and (C)

Description : The relative saturation of a partially saturated mixture of vapour and gas can be increased by __________ of the mixture. (A) Reducing the total pressure (B) Increasing the total pressure (C) Reducing the temperature (D) Both (B) and (C)

Last Answer : (D) Both (B) and (C)

Pick out the correct statement. (A) Higher hold up of the solid in the rotary dryer results in better exposure of the solids to the gas (B) The 'Hatta number' is important in problems involving gas absorption without chemical reaction (C) For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is linear in the case of steady state equimolal counter-diffusion (D) Total reflux in case of distillation operation requires infinite number of plates for a binary system separation

Description : Pick out the correct statement. (A) Higher hold up of the solid in the rotary dryer results in better exposure of the solids to the gas (B) The 'Hatta number' is ... reflux in case of distillation operation requires infinite number of plates for a binary system separation

Last Answer : (C) For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both components is linear in the case of steady state equimolal counter-diffusion

Pick out the wrong statement (A) A horizontal line on the humidity chart indicates the temperature changes at constant molal humidity (B) When water is cooled from 80 to 70°C by exposure to the air with a wet bulb temperature of 60°C, then both the approach & the range would be 10°C (C) For unsaturated air-water vapor mixture at atmospheric conditions, the wet bulb temperature & adiabatic cooling lines are the same (D) Relative saturation of unsaturated mixture of water vapor & air cannot be increased by either reducing the mixture temperature or by increasing the total pressure

Description : Pick out the wrong statement (A) A horizontal line on the humidity chart indicates the temperature changes at constant molal humidity (B) When water is cooled from 80 to 70°C by exposure ... & air cannot be increased by either reducing the mixture temperature or by increasing the total pressure

Last Answer : (D) Relative saturation of unsaturated mixture of water vapor & air cannot be increased by either reducing the mixture temperature or by increasing the total pressure

The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture. (A) Composition (B) Temperature (C) Total pressure (D) All (A), (B) and (C)

Description : The dew point of an unsaturated gas-vapor mixture does not depend upon the __________ of the mixture. (A) Composition (B) Temperature (C) Total pressure (D) All (A), (B) and (C)

Last Answer : (B) Temperature

The relative volatility of a binary mixture at constant temperature __________ the total pressure. (A) Decreases with increase in(B) Increases with increase in(C) Is independent of(D) None of these

Description : The relative volatility of a binary mixture at constant temperature __________ the total pressure. (A) Decreases with increase in (B) Increases with increase in (C) Is independent of (D) None of these

Last Answer : (A) Decreases with increase in

Pick out the wrong statement. (A) The vessel dispersion number (D/UL) for plug flow and mixed flow approaches zero and infinity respectively (B) Space time in a flow reactor is a measure of its capacity and is equal to the residence time when the density of reaction mixture is constant (C) Mixed reactor is always smaller than the plug flow reactor for all positive reaction orders for a particular duty (D) In an ideal tubular flow reactor, mixing takes place in radial direction and there is no mixing in longitudinal direction

Description : Pick out the wrong statement. (A) The vessel dispersion number (D/UL) for plug flow and mixed flow approaches zero and infinity respectively (B) Space time in a flow reactor is a ... ideal tubular flow reactor, mixing takes place in radial direction and there is no mixing in longitudinal direction

Last Answer : (C) Mixed reactor is always smaller than the plug flow reactor for all positive reaction orders for a particular duty

“The total volume of a mixture of non-reacting gases is equal to the sum of the partial volumes.” This statement is known as ______.  A. Law of Dulong and Petit  B. Maxwell-Boltzmann law  C. Amagat’s law  D. Avogadro’s law

Description : “The total volume of a mixture of non-reacting gases is equal to the sum of the partial volumes.” This statement is known as ______.  A. Law of Dulong and Petit  B. Maxwell-Boltzmann law  C. Amagat’s law  D. Avogadro’s law

Last Answer : Amagat’s law

Is it just a coincidence that the day of the week can be computed as if the Gregorian calendar started on a Sunday in the year 0?

Description : Is it just a coincidence that the day of the week can be computed as if the Gregorian calendar started on a Sunday in the year 0?

Last Answer : W A A A A Y too much time on your hands, is that a coincidence? ? ?

What do you mean by Computed tomography scan?

Description : What do you mean by Computed tomography scan?

Last Answer : A CT Scan combines a series of X-ray images taken from different angles around your body and uses computer processing to create cross sectional images of bones,blood vessels and soft tissue inside your body.