In a liquid-liquid extraction, 10 kg of a solution containing 2 kg of solute C and 8 kg of solvent A is brought into contact with 10 kg of solvent B. Solvent A and B are completely immiscible in each other whereas solute C is soluble in both the solvents. The extraction process attains equilibrium.The equilibrium relationship between the two phases is Y* = 0.9X, where Y* is the kg of C/kg of B and X is kg of C/kg of A. Choose the correct answer. (A) The entire amount of C is transferred to solvent B (B) Less than 2 kg but more than 1 kg of C is transferred to solvent B (C) Less than 1 kg of C is transferred to B (D) No amount of C is transferred to B

In a liquid-liquid extraction, 10 kg of a solution containing 2 kg of
solute C and 8 kg of solvent A is brought into contact with 10 kg of solvent
B. Solvent A and B are completely immiscible in each other whereas solute
C is soluble in both the solvents. The extraction process attains equilibrium.The equilibrium relationship between the two phases is Y* = 0.9X, where
Y*
is the kg of C/kg of B and X is kg of C/kg of A. Choose the correct
answer.
(A) The entire amount of C is transferred to solvent B
(B) Less than 2 kg but more than 1 kg of C is transferred to solvent B
(C) Less than 1 kg of C is transferred to B
(D) No amount of C is transferred to B
by

1 Answer

Answer :

(A) The entire amount of C is transferred to solvent B
by

Related questions

In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raffinate phase R containing A at xB = 0.5 and xR = 0.05 respectively. The total mass of the extract phase is (in Kg) (A) 6.89 (B) 8.89 (C) 10 (D) 8.25

Description : In a single stage extraction process, 10 kg of pure solvent S (containing no solute A) is mixed with 30 kg of feed F containing A at a mass fraction xf = 0.2. The mixture splits into an extract phase E and a raffinate ... phase is (in Kg) (A) 6.89 (B) 8.89 (C) 10 (D) 8.25

Last Answer : (B) 8.89

The rate of solid-liquid extraction is limited by the (A) Phase change of the solute as it dissolves in the solvent (B) Diffusion of the solute through the solvent in the pores to the outside of the particle (C) Diffusion of the solute from the solution in contact with the particle to the main bulk of the solution (D) All 'a', 'b' & 'c'

Description : The rate of solid-liquid extraction is limited by the (A) Phase change of the solute as it dissolves in the solvent (B) Diffusion of the solute through the solvent in the pores to the outside of the particle (C) ... contact with the particle to the main bulk of the solution (D) All 'a', 'b' & 'c'

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

The individual mass transfer co-efficients (moles/m2s) for absorption of a solute from a gas mixture into a liquid solvent are, KL = 4.5 and KG = 1.5. The slope of the equilibrium line is 3. Which of the following resistance (s) is (are) controlling? (A) Liquid side (B) Gas side (C) Interfacial (D) Both liquid and gas side

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. In a solution containing 0.30 Kg mole of solute and 600 kg of solvent, the molality is (A) 0.50 (B) 0.60 (C) 1 (D) 2

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Last Answer : (A) 0.50

A solute distributes itself between two non-miscible solvents in contact with each other in such a way that, at a constant temperature, the ratio of its concentrations in two layers is constant, irrespective of its total amount". This is (A) The distribution law (B) Followed from Margules equation (C) A corollary of Henry's law (D) None of these

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Immiscible liquids: w) are not mutually soluble x) dissolve in each other y) dissolve in more than one liquid z) are unstable and chemically react e) do not exist

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Last Answer : ANSWER: W -- ARE NOT MUTUALLY SOLUBLE

Pick out the wrong statement regarding the solubility characteristics of high polymers. (A) Greater the degree of cross-linking in the polymer, lesser is its solubility (B) Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents (C) Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent (D) High molecular weight polymers on dissolving gives solution of very low viscosity

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Last Answer : (D) High molecular weight polymers on dissolving gives solution of very low viscosity

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Pick out the wrong statement. (A) At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature (B) Normally, the gases which are easily liquefied are more soluble in common solvents (C) The gases which are capable of forming ions in aqueous solution are much more soluble in water than in other solvents (D) At constant pressure, solubility of a gas in a liquid increases with rise in temperature

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

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Which of the following terms has as its definition: a mixture having continuous and dispersed phases? w) colloid x) solute y) suspension z) solvent

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Fractional solvent extraction (A) Employs only one solvent (B) Employs two solvents (C) Results in low interfacial tension (D) None of these

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Last Answer : (B) Employs two solvents

A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. Specific heat of block material is 0.4 kJ.kg-1. K-1. Ignoring the effect of expansion and contraction and also the heat capacity to tank, the total entropy change in kJ.kg-1, K-1is (A) -1.87 (B) 0 (C) 1.26 (D) 3.91

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Last Answer : (B) 0

Stage efficiency in a leaching process depends on the (A) Time of contact between the solid and the solution (B) Rate of diffusion of the solute through the solid and into the liquid (C) Both (A) and (B) (D) Vapour pressure of the solution

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What are the solvent and solute in a solution containing 100 g of ethanol and 3 g of sucrose?

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Pick out the wrong statement. (A) The operating line always lies above the equilibrium solubility curve in case of a single component absorber (B) The operating line always lies below the equilibrium solubility curve in case of a single component stripper (C) The operating pressure in solvent extraction system should be below vapor pressures of all components (D) The solubility of a particular gas in ideal solution in any solvent is always the same

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Which of the following solvents is used for the extraction of H3PO4 from CaCl2 solution during manufacture of ortho-phosphoric acid by wet process employing hydrochloric acid leaching? (A) Isopropyl alcohol (B) Butyl alcohol (C) Toluene (D) Hexane

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An aqueous solution is always a solution in which the: w) solute is water x) solute is a salt y) solvent is a salt z) solvent is water

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Last Answer : ANSWER: Z -- SOLVENT IS WATER

Moles of solute divided by kilograms of solvent is expression for: w) molarity x) solute-to-solution ratio y) mole percentage z) molality

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In liquid extraction, if the selectivity is unity, then (A) Separation of the constituents is the most effective (B) No separation will occur (C) Amount of solvent required will be minimum (D) Solvent flow rate should be very low

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What is a solution A. a solid dissolved in a gas B. a solute and a solvent C. a liquid dissolved in a gas D. an amalgam of solids, liquids, and gases?

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At equilibrium the concentration of water in vapour phase (C* ) in kg/m3 of air space and the amount of water (m) adsorbed per kg of dry silica gel are related by, C* = 0.0667m. To maintain dry conditions in a room of air space 100m3 containing 2.2 kg of water vapour initially, 10 kg of dry silica gel is kept in the room. The fraction of initial water remaining in the air space after a long time (during which the temperature is maintained constant) is (A) 0.0 (B) 0.2 (C) 0.4 (D) 1.0

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Last Answer : (C) 0.4

The solvent used in liquid-liquid extraction should have __________ less than one. (A) Selectivity (B) Distribution co-efficient(C) Both (A) and (B)(D) Neither (A) nor (B)

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Pick out the wrong statement: (A) Change in barometric pressure does not affect the relative humidity (B) In case of a packed tower, the operating velocity is about half of the flooding velocity, generally (C) 'Elution' means the desorption of the adsorbed solute by a solvent (D) The equilibrium moisture content of the solid can be reduced by increasing the absolute humidity

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At equilibrium condition, the chemical potential of a material in different phases in contact with each other is equal. The chemical potential for a real gas (μ) is given by (where, μ = standard chemical potential at unit fugacity (f° = 1 atm.) and the gas behaves ideally.) (A) μ° + RT ln f (B) μ°+ R ln f (C) μ° + T ln f (D) μ° + R/T ln f

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Last Answer : ANSWER: Z -- SOLUBLE IN ORGANIC SOLVENTS

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

On addition of solute in the solvent, the __________ of the solution decreases. (A) Boiling point (B) Freezing point (C) Vapour pressure (D) Both (B) and (C)

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Molarity is defined as the number of gm moles of solute per __________ of solvent. (A) Litre (B) kg (C) gm (D) c.c

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Molality is defined as the number of gm moles of solute per __________ of solvent. (A) Litre (B) gm (C) Kg (D) m

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In case of constant underflow extraction operation, the __________ atall solute concentration.(A) Solids are drained to the same extent(B) Ratio of the insoluble to solution is constant(C) Both (A) & (B)(D) Neither (A) nor (B)

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1 kg of a saturated aqueous solution of a highly soluble component A at 60°C is cooled to 25°C. The solubility limits of A are (0.6 kgA/kg water) at 60°C and (0.2 kgA/kg water) at 25°C. The amount in kg of the crystals formed is: (A) 0.4 (B) 0.25 (C) 0.2 (D) 0.175

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If `x=9` is the chord of contact of the hyperbola `x^2-y^2=9` then the equation of the corresponding pair of tangents is (A) `9x^2-8y^2+18x-9=0` (B) `

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What no more solute can be dissolved in the solvent the solution is what?

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Last Answer : The word you're looking for is..... saturated.

What no more solute can be dissolved in the solvent the solution is what?

Description : What no more solute can be dissolved in the solvent the solution is what?

Last Answer : The word you're looking for is..... saturated.

Solvent used in the Udex (glycol) extraction process for removal of light aromatics from cracked naphtha is (A) Propane (B) Diethylene glycol (C) Aqueous solution (10% water) of diethylene glycol (D) Methyl ethyl ketone (MEK)

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Last Answer : (C) Aqueous solution (10% water) of diethylene glycol

Which of the following are correct statements concerning unsaturated hydrocarbons? (a) All unsaturated hydrocarbons are insoluble in water. (b) All unsaturated hydrocarbons are soluble in nonpolar solvents. (c) All unsaturated hydrocarbons are more dense than water. (d) (a) & (c)

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Last Answer : (a) & (c)

The number of moles of solute present in 1 kg of a solvent is called its (a) Molality (b) Molarity (c) Normality (d) Formality

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Last Answer : Ans:(a)

The number of moles of solute present in 1 kg of a solvent is called its?

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The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are: (A) 1 (B) 2 (C) 3 (D) 0

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Last Answer : (B) 2

When a solute is dissolved in a pure solvent, the resulting freezing point is: w) higher than pure solvent x) lower than pure solvent y) does not change z) cannot tell from this information

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Last Answer : ANSWER: X -- LOWER THAN PURE SOLVENT