Fractional Distillation

Q.

Name the methods used to separate solid-liquid mixtures.

Q.

What is fractional crystallization ?

Q.

Absolute alcohol can be obtained from rectified spirit by:

1. Fractional distillation

2. Azeotropic distillation

3. Vacuum distillation

4. Steam distillation

Q.

The process which is used to separate a mixture of two or more miscible liquids for which the difference in boiling points is less than 25 K is Fractional distillation.

1. True

2. False

Q.

Identify the methods by which the individual components of mixture containing water, potassium nitrate, Sodium chloride, alcohol and carbon tetrachloride can be separated.

1. Separating funnel, fractional distillation, fractional crystallization, distillation

2. fractional distillation, distillation, fractional crystallization

3. separating funnel, fractional distillation, filtration, distillation

4. separating funnel, fractional distillation, sedimentation and decantation

Q.

Fractional distillation is used in separation of crude oil instead

Of simple distillation, why?

Q.

Both simple distillation and fractional distillation can be used to separate two miscible liquids present in a mixture. If they differ in boiling points by more than${25}^{\circ }$$C$, simple distillation is used. In case the difference is less than this temperature, then the process of fractional distillation can be employed. A fractionating column is used in the case of fractional distillation and is placed in the distillation flask. It can have a variety of shapes. No such column is needed in the case of simple distillation.

1. Which distillation process can be used to separate a miscible liquid mixture of acetone (bp = 56$°$C) and ethyl alcohol (bp = 78$°$C)?
2. How does fractionating column work in this case?
3. Which liquid will get distilled first?
4. What will happen if the fractionating column is removed?

Q. A mixture of two miscible liquids can be separated by _________ provided the difference between their boiling points is atleast $25{}^0\text{C}$.

1. fractional distillation
2. sublimation
3. centrifugation
4. distillation

Q.

Is it possible to separate a mixture of ethanol and toluene by distillation?

Q.

Choose the odd one out. Give reasons for the choice.

Vinegar, alcohol, acetic acid, oil.

Q. Heating of coal in the absence of air is called distillation.

1. destructive
2. carbonised
3. fractional

Q.

State the principle of fractional distillation.

Q.

Name the process used to separate a mixture of two miscible liquids.

Q.

Liquid should have the difference 30 degree in their boiling point to take care for fractional distillation

Q.

Arrange the following mixtures in the order of separation methods given below:

Gravity separation, centrifugation, fractional distillation, distillation, separating funnel.

(A) KNO₃ + Water

(B) Petrol + alcohol

(C) Water + alcohol

(D) Sand + finely powdered chalk

(E) Blood

1. D, E, C, A, B

2. D, C, A, E, B

3. C, A, D, E, B

4. C, E, A, B, D

Q. Fractional distillation is a/anprocess.

1. chemical
2. physical
3. irreversible

Q.

The process used to separate a mixture of two or more miscible liquids when the difference in their boiling points is less than $25{}^{\circ }C$ is ___.

1. Distillation

2. Fractional distillation

3. Centrifugation

4. Separating funnel

Q.

A and B are miscible liquids and they combine to form a mixture. This mixture can be separated by method C. The boiling point of A is $78{}^{\circ }C$ and that of B is ${100}^{\circ }C$. Identify the process C and which of the following is the volatile component?

1. C:- Fractional distillation

   Volatile component:- A

2. C:- Fractional distillation

   Volatile component:- B

3. C:- Distillation

   Volatile component:- B

4. C:- Distillation

   Volatile component:- A

Q. The given image represents the fractional distillation of petroleum to obtain various products. Identify the products P, Q, R, and S.​

1. P: Fuel oil; Q: Diesel; R: Kerosene; S: Petrol​
2. P: Kerosene; Q: Petrol; R: Fuel oil; S: Diesel​
3. P: Diesel; Q: Fuel oil; R: Petrol; S: Kerosene
4. P: Petrol; Q: Kerosene; R: Diesel; S: Fuel oil​

Q. Arrange the products obtained in fractional distillation column from top to bottom during petroleum refining:

1. Petroleum gas
2. Petrol
3. Kerosene
4. Lubricating oil

Q. What is fractional distillation

Q.

What method will you use to get pure liquid if it has dissolved impurities present in it?

Q.

Explain how fractional distillation is used to separate mixtures.

Q. Heating of coal in the absence of air is called distillation.

1. destructive
2. fractional
3. carbonised

Q.

The correct order of the products collected from the fractional distillation column from top to bottom is:

1. Petrol, petroleum gas, kerosene and bitumen.

2. Petroleum gas, kerosene, petrol, and bitumen.

3. Petrol, kerosene, petroleum gas and bitumen.

4. Petroleum gas, petrol, kerosene and bitumen.

Q.

Differentiate between

e. Distillation and fractional distillation

Q. Which of the following is used for refining of petroleum?

1. Steam distillation
2. Distillation under reduced pressure
3. Solvent extraction
4. Fractional distillation

Q.

Which one of the following mixtures can be separated into pure components by fractional distillation?

1. Benzene-toluene

2. Water-nitric acid

3. Water-ethyl alcohol

4. Water-hydrochloric acid.

Q. By which of the following process hydrocarbons are found from petroleum?

1. Combustion
2. Fractional distillation
3. Addition
4. All of the above

Q. Which among the following method is used to obtain petrol, kerosene and diesel from crude oil?

1. Centrifugation
2. Evaporation
3. Distillation
4. Fractional distillation