Numer of fractions on fractional distillation of mixture of:

Numer of fractions on fractional distillation of mixture of:
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Numer of fractions on fractional distillation of mixture of: A. 2 B. 3 C. 4 D. 1
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Consider the following statements: 1. Carbyne is an allotrope of carbon. 2. Gasoline, used as a fuel in motor vehicles is a mixture of petrol and alcohol. 3. Petroleum is also known as 'liquid gold'. 4. The various components of crude oil are separated by fractional distillation. The correct statements are: (a) 1, 2 and 4 only (b) 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

Description : Consider the following statements: 1. Carbyne is an allotrope of carbon. 2. Gasoline, used as a fuel in motor vehicles is a mixture of petrol and alcohol. 3. Petroleum is also known as 'liquid gold'. 4. The various components of crude ... (b) 1, 3 and 4 only (c) 1, 2, 3 and 4 (d) 1, 2 and 3 only

Last Answer : Ans:(b)

Which of the following pair of isomers can not be separated by fractional crystallisation or fractional distillation:

Description : Which of the following pair of isomers can not be separated by fractional crystallisation or fractional distillation:

Last Answer : Which of the following pair of isomers can not be separated by fractional crystallisation or fractional ... )-lactic acid and (-) -lactic acid

(i) Total number of tractions on fractional distillation of I, II and III. (ii) Optical active compounds. (iii) Relation between I and II. (iv) Relati

Description : (i) Total number of tractions on fractional distillation of I, II and III. (ii) Optical active compounds. (iii) Relation between I and II. (iv) Relati

Last Answer : (i) Total number of tractions on fractional distillation of I, II and III. (ii) Optical active compounds. ... and II. (iv) Relation between I and II.

Absolute alcohol cannot be obtained by simple fractional distillation because

Description : Absolute alcohol cannot be obtained by simple fractional distillation because

Last Answer : Absolute alcohol cannot be obtained by simple fractional distillation because A. pure `C_(2)H_ ... oxidation D. it forms azeotropic mixture with water

What are a group of compounds collected during fractional distillation?

Description : What are a group of compounds collected during fractional distillation?

Last Answer : These are components with lower boiling points.

When during fractional distillation hydrocarbons are separated according to their?

Description : When during fractional distillation hydrocarbons are separated according to their?

Last Answer : Fractional distillation separates substances according to theirboiling point.

Consider the following processes: 1. Evaporation 2. Fractional distillation 3. Distillation 4. Filtration The process(es) involved in the refining of crude oil is/ are: (a) 3 only (b) 2 and 3 (c) 3 only (d) 1 only

Description : Consider the following processes: 1. Evaporation 2. Fractional distillation 3. Distillation 4. Filtration The process(es) involved in the refining of crude oil is/ are: (a) 3 only (b) 2 and 3 (c) 3 only (d) 1 only

Last Answer : Ans:(b)

Coke is obtained from coal by (a) Distillation (b) Fractional distillation (c) Destructive distillation (d) Cracking

Description : Coke is obtained from coal by (a) Distillation (b) Fractional distillation (c) Destructive distillation (d) Cracking

Last Answer : Ans:(c)

The manufacturing of iron from ironore involves the process of - (1) Oxidation (2) Reduction (3) Electrolysis (4) Fractional distillation

Description : The manufacturing of iron from ironore involves the process of - (1) Oxidation (2) Reduction (3) Electrolysis (4) Fractional distillation

Last Answer : (2) Reduction Explanation: Iron is extracted from iron ore in a huge container called a blast furnace. Iron ores such as hematite contain iron oxide. The oxygen must be removed from the iron oxide to leave the iron behind. Reactions in which oxygen is removed are called reduction reactions.

The manufacture of iron from iron ore involves the process of – (1) oxidation (2) reduction (3) fractional distillation (4) electrolysis

Description : The manufacture of iron from iron ore involves the process of – (1) oxidation (2) reduction (3) fractional distillation (4) electrolysis

Last Answer : (2) reduction Explanation: The manufacture of iron ore involves the process of reduction. Important ores of iron : Haematite, Magnetite.

Sea water can be purified by the process of – (1) distillation (2) evaporation (3) filtration (4) fractional distillation

Description : Sea water can be purified by the process of – (1) distillation (2) evaporation (3) filtration (4) fractional distillation

Last Answer : (1) distillation Explanation: The traditional process used in desalination operations is vacuum distillation- essentially the boiling of water at less than atmospheric pressure and thus a much ... when the vapor pressure equals the ambient pressure and vapor pressure increases with temperature.

Two liquids (A)and(B)are separated by fractional distillation, the boiling point of (A) is less than (B).which liquid comes out first in distillate? Explain.

Description : Two liquids (A)and(B)are separated by fractional distillation, the boiling point of (A) is less than (B).which liquid comes out first in distillate? Explain.

Last Answer : The liquid (a) comes out first in distillate. On boiling the vapours of lower boiling component are formed first.

Why water cannot be separated completely from ethyl alcohol by fractional distillation?

Description : Why water cannot be separated completely from ethyl alcohol by fractional distillation?

Last Answer : Ethyl alcohol and water (95.4% ethyl alcohol and 4.6% water) form constant boiling mixture (azeotrope) boiling at 351.1 K. Hence, further water cannot be separated completely from ethyl alcohol by fractional distillation.

The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and recondensed, then the liquid with the next higher boiling point is then evaporated and recondensed, and so on until all the available liquid fuels are separately recovered in the sequence of their boiling points. Such a process is called  A. cracking  B. carbonisation  C. fractional distillation  D. full distillation

Description : The distillation carried out in such a way that the liquid with the lowest boiling point is first evaporated and recondensed, then the liquid with the next higher boiling point is then evaporated and ... is called  A. cracking  B. carbonisation  C. fractional distillation  D. full distillation

Last Answer : Answer: C

Give application of simple distillation. What is the principle of fractional distillation?

Description : Give application of simple distillation. What is the principle of fractional distillation?

Last Answer : Applications of simple distillation:  i. It is used for the preparation of distilled water and water for injection. ii. Preparation of many volatile oils and aromatic water. iii. Purification ... becomes richer with the liquid having the lower boiling point which gets condensed in a condenser. 

Give the principle, working and application of” Fractional distillation.

Description : Give the principle, working and application of” Fractional distillation.

Last Answer : Principle of fractional distillation:  It differs from simple distillation in that Partial condensation of vapour is allowed to occur in a fractionating column through which the vapour must pass before reaching ... , such as alcohol & water, acetone & water, Chloroform & Benzene.

Explain the theory of fractional distillation?

Description : Explain the theory of fractional distillation?

Last Answer : Theory of fractional distillation:  i. When substance dissolved in liquid, the vapour pressure of liquid is lowered. ii. When two miscible liquids are mixed together each will act as ... from two miscible liquids at boiling point is richer in component exerting the greater partial pressure.

Explain the theory of fractional distillation.

Description : Explain the theory of fractional distillation.

Last Answer : Theory: When the substance dissolved in a liquid, the vapour pressure of the liquid is lowered. When two miscible liquid are mixed together, each will act as solute or solvent for ... condensing vapour returning to still. This results in enrichment of the vapour in the more volatile component.

Crude oil is separated into its components by: w) chemical reaction x) simple distillation y) fractional distillation z) settling

Description : Crude oil is separated into its components by: w) chemical reaction x) simple distillation y) fractional distillation z) settling

Last Answer : ANSWER: Y -- FRACTIONAL DISTILLATION 

The noble gases have low boiling points because: w) their ionization potentials are very low x) only weak Van der Waals forces hold the atoms together y) they are produced by the fractional distillation of liquid air z) they have eight electrons in the outer shell

Description : The noble gases have low boiling points because: w) their ionization potentials are very low x) only weak Van der Waals forces hold the atoms together y) they are produced by the fractional distillation of liquid air z) they have eight electrons in the outer shell

Last Answer : ANSWER: X -- ONLY WEAK VAN DER WAALS FORCES HOLD THE ATOMS TOGETHER

The manufacturing of iron from ironore involves the process of (1) Oxidation (2) Reduction (3) Electrolysis (4) Fractional distillation

Description : The manufacturing of iron from ironore involves the process of (1) Oxidation (2) Reduction (3) Electrolysis (4) Fractional distillation

Last Answer : Reduction

The manufacture of iron from iron ore involves the process of (1) oxidation (2) reduction (3) fractional distillation (4) electrolysis

Description : The manufacture of iron from iron ore involves the process of (1) oxidation (2) reduction (3) fractional distillation (4) electrolysis

Last Answer : reduction

Which of the following is not a method of preparing oxygen? (1) Electrolysis of water (2) Fractional distillation of liquid air (3) Decomposition of potassium permanganate (4) Decomposition of manganese dioxide

Description : Which of the following is not a method of preparing oxygen? (1) Electrolysis of water (2) Fractional distillation of liquid air (3) Decomposition of potassium permanganate (4) Decomposition of manganese dioxide

Last Answer : Decomposition of manganese dioxide

Sea water can be purified by the process of (1) distillation (2) evaporation (3) filtration (4) fractional distillation

Description : Sea water can be purified by the process of (1) distillation (2) evaporation (3) filtration (4) fractional distillation

Last Answer : distillation

Impure camphor is purified by (1) sublimation (2) fractional crystallisation (3) fractional distillation (4) steam distillation

Description : Impure camphor is purified by (1) sublimation (2) fractional crystallisation (3) fractional distillation (4) steam distillation

Last Answer : sublimation

Which of the following fractions of coal-tar distillation contains naphthalene? (a) Light oil (b) Middle oil (c) Heavy oil (d) Anthracene oil

Description : Which of the following fractions of coal-tar distillation contains naphthalene? (a) Light oil (b) Middle oil (c) Heavy oil (d) Anthracene oil

Last Answer : Middle oil

Which of the following fractions of coal-tar distillation contains benzene? (a) Light oil (b) Middle oil (c) Heavy oil (d) Anthracene oil

Description : Which of the following fractions of coal-tar distillation contains benzene? (a) Light oil (b) Middle oil (c) Heavy oil (d) Anthracene oil

Last Answer : Light oil

how do you find a percent of a numer?

Description : how do you find a percent of a numer?

Last Answer : If you have a score of 12/15 divide 12 from 15 and then multiply by 100 and you will get the percent. If you are looking for a percent of a number like 5% of 100 then you can divide 100 by 5 and will get 20.

The numer of enrolments in a school has increased from 1800 to 2016. The percentage increase in the enrolments is `"______".`

Description : The numer of enrolments in a school has increased from 1800 to 2016. The percentage increase in the enrolments is `"______".`

Last Answer : The numer of enrolments in a school has increased from 1800 to 2016. The percentage increase in the enrolments is `" ... ` B. `11%` C. `12%` D. `13%`

In argon, find the numer of electrons with spin value `+(1)/(2)`

Description : In argon, find the numer of electrons with spin value `+(1)/(2)`

Last Answer : In argon, find the numer of electrons with spin value `+(1)/(2)`

I need a address and numer for a elementary schools in miami,fl?

Description : I need a address and numer for a elementary schools in miami,fl?

Last Answer : I'm not sure which elementary schools in Miami you are looking for, so here are two: Ada Merritt Elementary School, 660 SW 3rd St., (305)326-0791; and Coral Way Elementary School, 1950 SW 13th Ave., (305)854-0515.

A chemical reaction, A → 3B, is conducted in a constant pressure vessel. Starting with pure A, the volume of the reaction mixture increases 3 times in 6 minutes. The fractional conversion is (A) 0.33 (B) 0.5 (C) 1 (D) Data insufficient, can't be predicted

Description : A chemical reaction, A → 3B, is conducted in a constant pressure vessel. Starting with pure A, the volume of the reaction mixture increases 3 times in 6 minutes. The fractional conversion is (A) 0.33 (B) 0.5 (C) 1 (D) Data insufficient, can't be predicted

Last Answer : (C) 1

What property of substance does distillation used as basis for separation of components of a mixture?

Description : What property of substance does distillation used as basis for separation of components of a mixture?

Last Answer : Different materials have different boiling points.

A mixture of water and alcohol can be separated by – (1) Filtration (2) Evaporation (3) Decantation (4) Distillation

Description : A mixture of water and alcohol can be separated by – (1) Filtration (2) Evaporation (3) Decantation (4) Distillation

Last Answer : (4) Distillation Explanation: A mixture of water and alcohol is separated by the process of distillation. At 780C, alcohol starts to vaporize. The vapours are condensed in the condenser and alcohol is collected in the receiver.

Iodine can be separated from a mixture of Iodine and Potassium Chloride by - (1) Filtration (2) Sublimation (3) Distillation (4) Sedimentation

Description : Iodine can be separated from a mixture of Iodine and Potassium Chloride by - (1) Filtration (2) Sublimation (3) Distillation (4) Sedimentation

Last Answer : (2) Sublimation Explanation: Iodine can be separated from a mixture of Iodine and Potassium Chloride by Sublimation. Sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

Iodine can be separated from a mixture of Iodine and Potassium Chloride by – (1) sedimentation (2) filtration (3) sublimation (4) distillation

Description : Iodine can be separated from a mixture of Iodine and Potassium Chloride by – (1) sedimentation (2) filtration (3) sublimation (4) distillation

Last Answer : (3) sublimation Explanation: Iodine is well known to sublime (change from solid to gas without becoming liquid in between) when heated. However sodium chloride has a melting point much higher ... by using a sublimation apparatus, with solid iodine collected by condensation on a cold surface.

Water can be separated from alcohol water mixture by – (1) decantation (2) evaporation (3) distillation (4) sublimation

Description : Water can be separated from alcohol water mixture by – (1) decantation (2) evaporation (3) distillation (4) sublimation

Last Answer : (3) distillation Explanation: Distillation is a method of separating mixtures based on differences in volatilities of components in a boiling liquid mixture. Distillation is a unit operation, or a ... is distilled to separate its components- notably oxygen, nitrogen, and argon- for industrial use.

A mixture of water and alcohol can be separated by - (1) Filtration (2) Evaporation (3) Distillation (4) Decantation

Description : A mixture of water and alcohol can be separated by - (1) Filtration (2) Evaporation (3) Distillation (4) Decantation

Last Answer : (3) Distillation Explanation: Simple distillation is a procedure by which two liquids with different boiling points can be separated.

In extractive distillation, solvent is (A) Added to alter the relative volatility of the mixture (B) Of high volatility (C) Present in overhead stream (D) Of high viscosity to give high tray efficiency

Description : In extractive distillation, solvent is (A) Added to alter the relative volatility of the mixture (B) Of high volatility (C) Present in overhead stream (D) Of high viscosity to give high tray efficiency

Last Answer : (A) Added to alter the relative volatility of the mixture

The-relative volatility for separation of a non-ideal binary mixture by distillation should be (A) 0 (B) 1 (C) > 1 (D) < 1

Description : The-relative volatility for separation of a non-ideal binary mixture by distillation should be (A) 0 (B) 1 (C) > 1 (D) < 1

Last Answer : (C) > 1

Entrainer used in Azeotropic distillation should (A) Form a low boiling azeotrope with one of the constituents of the mixture (B) Form a new azeotrope of low relative volatility with one of the constituents of the mixture (C) Have high latent heat of vaporisation (D) Have high viscosity to provide high tray efficiency

Description : Entrainer used in Azeotropic distillation should (A) Form a low boiling azeotrope with one of the constituents of the mixture (B) Form a new azeotrope of low relative volatility with one of the ... (C) Have high latent heat of vaporisation (D) Have high viscosity to provide high tray efficiency

Last Answer : (A) Form a low boiling azeotrope with one of the constituents of the mixture

__________ is used as an 'entrainer' for the separation of acetic acid￾water mixture by distillation. (A) Furfural (B) Benzol (C) Butyl acetate (D) Hexane

Description : __________ is used as an 'entrainer' for the separation of acetic acid￾water mixture by distillation. (A) Furfural (B) Benzol (C) Butyl acetate (D) Hexane

Last Answer : (C) Butyl acetate

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

Components, having widely different boiling point in a binary mixture, can be separated using __________ distillation. (A) Molecular (B) Extractive (C) Steam (D) Simple

Description : Components, having widely different boiling point in a binary mixture, can be separated using __________ distillation. (A) Molecular (B) Extractive (C) Steam (D) Simple

Last Answer : (D) Simple

In case of __________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated. (A) Molecular (B) Azeotropic (C) Extractive

Description : In case of __________ distillation, a solvent is added to alter the relative volatility of the mixture to be separated. (A) Molecular (B) Azeotropic (C) Extractive

Last Answer : (C) Extractive

Pick out the wrong statement. (A) Constant pressure distillation cannot separate an Azeotropic mixture (B) Relative volatility of a binary mixture changes appreciably with the minor change in temperature (C) The relative volatility of a binary mixture at Azeotropic composition is unity (D) Flash distillation is practised on wide spread scale in petroleum refinery

Description : Pick out the wrong statement. (A) Constant pressure distillation cannot separate an Azeotropic mixture (B) Relative volatility of a binary mixture changes appreciably with the minor change in ... unity (D) Flash distillation is practised on wide spread scale in petroleum refinery

Last Answer : (B) Relative volatility of a binary mixture changes appreciably with the minor change in temperature

A binary mixture of benzene and cyclohexane is separated by (A) Flash vaporisation (B) Extractive distillation (C) Solvent extraction (D) Ordinary distillation

Description : A binary mixture of benzene and cyclohexane is separated by (A) Flash vaporisation (B) Extractive distillation (C) Solvent extraction (D) Ordinary distillation

Last Answer : (B) Extractive distillation

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

Steam distillation is not recommended to be used, if the (A) Azeotropic mixture is to be separated and the final product is miscible with water (B) Liquids decompose, if distilled directly at atmospheric pressure (C) Material cannot be distilled by indirect heating even under low pressure, because of the high boiling temperature (D) Material to be distilled is thermally unstable or has the tendency to react with other components associated with it, at the boiling temperature

Description : Steam distillation is not recommended to be used, if the (A) Azeotropic mixture is to be separated and the final product is miscible with water (B) Liquids decompose, if ... unstable or has the tendency to react with other components associated with it, at the boiling temperature

Last Answer : (A) Azeotropic mixture is to be separated and the final product is miscible with water

While separating a mixture of ortho and para-nitro phenols by steam distillation, name the isomer which will be steam volatile. Give reasons.

Description : While separating a mixture of ortho and para-nitro phenols by steam distillation, name the isomer which will be steam volatile. Give reasons.

Last Answer : In o-nitrophenol, there is intramolecular hydrogen bonding as follows : In p-nitrophenol, there is intramolecular hydrogen bonding as follows :   Due to intermolecular H ... -nitrophenol. Hence o-nitraphenol due to its lower b. p. is steam volatile while pnitrophenol is not.