**Description :** Which of the following is the Ideal gas law (equation)? A. V/T = K B. V= k*(1/P) C. P1/T1 = P2/T2 D. PV = nRT

**Last Answer :** PV = nRT

**Description :** The ideal gas equation is A. PV = constant B. PT = constant C. V⁄T D. PV = nRT

**Last Answer :** PV = nRT

**Description :** Which of the following statements is TRUE for an ideal gas, but not for a real gas? A. PV = nRT B. An increase in temperature causes an increase in the kinetic energy of the gas C. The ... same as the volume of the gas as a whole D. No attractive forces exists between the molecule of a gas

**Last Answer :** PV = nRT

**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

**Description :** The equation, PV = nRT, is best obeyed by gases at (A) Low pressure & high temperature (B) High pressure & low temperature (C) Low pressure & low temperature (D) None of these

**Last Answer :** (A) Low pressure & high temperature

**Description :** General gas equation is (a) PV=nRT (b) PV=mRT (d) PV = C (c) PV=KiRT (e) Cp-Cv = Wj

**Last Answer :** Answer : b

**Description :** Which of the following is Virial equation of state? (A) (p + a/V2)(V - b) = nRT (B) PV = nRT (C) PV = A + B/V + C/V2 + D/V3 + ... (D) None of these

**Last Answer :** (C) PV = A + B/V + C/V2 + D/V3 + ...

**Description :** Compressibility factor of a gas is (A) Not a function of its pressure (B) Not a function of its nature (C) Not a function of its temperature (D) Unity, if it follows PV = nRT

**Last Answer :** (A) Not a function of its pressure

**Description :** What is the pressure of 4 moles of helium in a 50 L tank at 308 K Use PV = nRT.?

**Last Answer :** 2.02 atm (apex)

**Description :** A perfect gas (A) Does not satisfy PV = nRT (B) Is incompressible and has zero viscosity (C) Has constant specific heat (D) Can’t develop shear stresses

**Last Answer :** (C) Has constant specific heat

**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

**Description :** The compressibility factor, x, is used for predicting the behavior of nonideal gases. How is the compressibility ty factor defined relative to an ideal gas? (subscript c refers to critical value) A. ... compressibility factor, x, is an dimensionless constant given by pV=zRT. Therefore z = pV / RT

**Last Answer :** z = pV/ RT

**Description :** What mass of nitrogen is contained in a10 ft3 vessel at a pressure of 840atm and 820°R? Make a computation by using ideal gas equation. a. 194lb b. 214lb c. 394 lb d. 413lb formula: m=pV /RT

**Last Answer :** 394 lb

**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

**Description :** Chemistry formula PV = nRT, here , what is the meaning of R ?

**Last Answer :** Here R is the molar gas constant. The value of R is L-atm unit 0.0621 L atm mol-¹K- . The dimension of R = work / (mole × K) Thus , the amount of work or energy obtained from the standard gas per mole for 1 K temperature increase is equal to R. This is the physical significance of R.

**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.

**Description :** 3.0 lbm of air are contained at 25 psia and 100 ˚F. Given that Rair = 53.35 ft-lbf/lbm- ˚F, what is the volume of the container? A.10.7 ft^3 B.14.7 ft^3 C.15 ft^3 D.24.9 ft^3 Formula: use the ideal gas law pV = mRT T = (100 +460) ˚R V = mRT/p

**Last Answer :** 24.9 ft^3

**Description :** The expression, ∆G = nRT. ln(P2/P1), gives the free energy change (A) With pressure changes at constant temperature (B) Under reversible isothermal volume change (C) During heating of an ideal gas (D) During cooling of an ideal gas

**Last Answer :** (A) With pressure changes at constant temperature

**Description :** In the equation Pv = RT, the constant of proportionality R is known as ______. A. Universal gas constant B. Gas constant C. Ideal gas factor D. Gas index

**Last Answer :** Gas constant

**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

**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

**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

**Description :** Assuming compression is according to the Law PV = C, Calculate the initial volume of the gas at a pressure of 2 bars w/c will occupy a volume of 6m³ when it is compressed to a pressure of 42 Bars. a) 130m³ b) 136m³ c) 120m³ d) 126m³ Formula: P1V1/T1 =P2V2/T2

**Last Answer :** 126m³

**Description :** The expression, nRT ln(P1/P2), is for the __________of an ideal gas. (A) Compressibility (B) Work done under adiabatic condition (C) Work done under isothermal condition (D) Co-efficient of thermal expansion

**Last Answer :** C) Work done under isothermal condition

**Description :** The characteristic equation of gases pv = mRT holds good for (a) mono atomic gases (b) diatomic gases (c)real gases (d) ideal gases

**Last Answer :** Ans: c

**Description :** If air is at pressure, p, of 3200 lbf/ft2 , and at a temperature, T, of 800 ˚R, what is the specific volume, v? (R=5303 ft-lbf/lbm-˚R, and air can be modeled as an ideal gas.) A.9.8 ft^3/lbm B.11.2 ft^3/lbm C.13.33 ft^3/lbm D.14.2 ft^3/lbm Formula: pv = RT v = RT / p

**Last Answer :** 13.33 ft^3/lbm

**Description :** The partial molar enthalpy of a component in an ideal binary gas mixture of composition Z, at a temperature T and pressure P, is a function only of (A) T (B) T and P (C) T, P and Z (D) T and Z

**Last Answer :** (B) T and P

**Description :** Under which of the following conditions does the behavior of a real gas resemble that of an ideal gas? Is it: w) under all conditions of temperature and pressure x) only at very high pressure ... when the gas is near condensation z) only at low densities when the molecules are relatively far apart

**Last Answer :** ANSWER: Z -- ONLY AT LOW DENSITIES WHEN THE MOLECULES ARE RELATIVELY FAR APART

**Description :** The partial pressure distribution of an ideal gas diffusing through another stagnant ideal gas at steady state follows a/an __________ law. (A) Exponential (B) Parabolic (C) Linear (D) Cubic

**Last Answer :** (A) Exponential

**Description :** According to Avogadro's law A. the product of the gas constant and the molecular mass of an ideal gas is constant B. the sum of partial pressure of the mixture of two gases is sum of the ... all gases, at the same temperature and pressure, contain equal number of molecules D. all of the above

**Last Answer :** Answer: C

**Description :** "The solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid" is a fair statem of: w) Dalton's secondary law x) Le Chatelier's solubility principle y) Henry's law z) none of the above

**Last Answer :** ANSWER: Y -- HENRY'S LAW

**Description :** Vegetable oil is made into margarine through: w) halogenation x) partial hydrogenation y) methylation z) oxidation

**Last Answer :** ANSWER: X -- PARTIAL HYDROGENATION

**Description :** If the heat of solution of an ideal gas in a liquid is negative, then its solubility at a given partial pressure varies with the temperature as (A) Solubility increases as temperature ... (D) Solubility increases or decreases with temperature depending on the Gibbs free energy change of solution

**Last Answer :** (B) Solubility increases as temperature decreases

**Description :** 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

**Last Answer :** (A) Greater than that computed for ideality

**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

**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.

**Description :** If two different gases have the same volume, temperature, and pressure and behave like ideal gases, they will also be identical in which one of the following ways? w) average molecular velocity x) total mass y) total molecular kinetic energy z) average momentum per molecule

**Last Answer :** ANSWER: Y -- TOTAL MOLECULAR KINETIC ENERGY

**Description :** According to the kinetic theory, the Kelvin temperature of an ideal gas is proportional to which one of the following. Is the temperature proportional to the gas's average molecular: w) velocity x) momentum y) kinetic energy z) potential energy

**Last Answer :** ANSWER: Y -- KINETIC ENERGY

**Description :** "Under the same conditions of temperature and pressure, the volumes of reacting gases and of their gaseous products are expressed in ratios of small whole numbers." This law is attributed to: w) Dalton x) Gay-Lussac y) Ramsay z) Avogadro

**Last Answer :** ANSWER: X -- GAY-LUSSAC

**Description :** The man credited with the law relating the temperature and volume of a gas is: w) Thomson x) Boyle y) Charles z) Dalton

**Last Answer :** ANSWER: Y -- CHARLES

**Description :** Clausius-Clapeyron Equation gives accurate result, when the (A) Vapour pressure is relatively low and the temperature does not vary over wide limits (B) Vapour obeys the ideal gas law and the latent heat of ... is negligible compared with that in the vapour state (D) All (A), (B) and (C)

**Last Answer :** (D) All (A), (B) and (C)

**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

**Description :** Fugacity of a component in an ideal gas mixture is equal to the partial pressure of that component in the mixture. The fugacity of each component in a stable homogeneous solution at constant pressure and ... increases. (A) Decreases (B) Decreases exponentially (C) Increases (D) Remain constant

**Last Answer :** (C) Increases

**Description :** In an ideal gas mixture, fugacity of a species is equal to its (A) Vapor pressure (B) Partial pressure (C) Chemical potential (D) None of these

**Last Answer :** (B) Partial pressure

**Description :** Pick out the wrong statement. (A) Activity co-efficient is dimensionless. (B) In case of an ideal gas, the fugacity is equal to its pressure. (C) In a mixture of ideal gases, the fugacity of ... equal to the partial pressure of the component. (D) The fugacity co-efficient is zero for an ideal gas

**Last Answer :** (D) The fugacity co-efficient is zero for an ideal gas

**Description :** According to Avogadro's Hypothesis (a) the molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature (b) the sum of partial pressure of ... gases have two values of specific heat (e) all systems can be regarded as closed systems.

**Last Answer :** Answer : a

**Description :** A net ionic equation does NOT show: w) electronic charges x) solid products (precipitates) y) spectator ions z) reacting species

**Last Answer :** ANSWER: Y -- SPECTATOR IONS

**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

**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

**Description :** Which one of the following is largest? w) the number of molecules in 2 grams of hydrogen gas x) the number of molecules in 60 grams of lead sulfate y) the number of molecules in 20 liters of oxygen gas at standard temperature and pressure z) the population of the United States

**Last Answer :** ANSWER: A - THE NUMBER OF MOLECULES IN 2 GRAMS OF HYDROGEN GAS