Distillation

Q.

Distillation can be used to separate a mixture of two substances with the same boiling point.

1. True

2. False

Q.

A mixture of iron filings and dust can be separated by

1. Decantation

2. Filtration

3. None of these

4. Magnetic separation

Q.

Name a method to check the purity of liquid.

Q. Which amongst the following process is not involved in distillation? [1 mark]

a. Boiling
b. Condensation
c. Evaporation
d. Freezing

Q.

On what principle of the following methods of separation based give one example of a mixture for each of the methods mentioned in which they are used

A. Sublimation, and

B. Chromatography

Q.

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

1. Petroleum gas, petrol, kerosene and bitumen.

2. Petrol, petroleum gas, kerosene and bitumen.

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

4. Petrol, kerosene, petroleum gas and bitumen.

Q. ________ involves evaporation and condensation during the separation of a mixture.

1. Centrifugation
2. Chromatography
3. Separating funnel
4. Distillation

Q. A mixture of two miscible liquids (acetone and methanol) cannot be separated by simple distillation because:

1. Difference in their boiling points is not greater than 25ºC.
2. Difference in their boiling points is greater than 25ºC.
3. They decompose and form other compounds.
4. Both of them sublime at a very low temperature.

Q. What process would you use to separate and then collect alcohol (b.p. ${78}^{\circ }C$) from a mixture of alcohol and water ?

1. Distillation
2. Filtration
3. Sublimation
4. Chromatography

Q.

Assertion:

Distillation is good for separating a liquid from a solution

Reason:

Distillation method works because the water evaporates from the solution, but is then cooled and condensed into a separate container.

1. Both assertion and reason are valid, and the reason is the valid explanation for assertion

2. Both assertion and reason are valid, but reason is not the valid explanation for assertion

3. Assertion is valid, but the reason is invalid

4. Both assertion and reason are invalid

Q.

_______________ method of separation involves both evaporation and condensation.

Q.

___ method is suited for separating the component substances from a liquid mixture by selective evaporation and condensation.

Q.

On what principle is chromatography based please explain me this very nicely because tomorrow is my exam

Q.

Ammonium chloride is separated from a mixture of sodium chloride and ammonium chloride by?

1. sublimation

2. filtration

3. evaporation

4. fractional distillation

Q.

Name the method used for the separation of Benzene$\left({\mathrm{C}}_6{\mathrm{H}}_6\right)$ $\left(80.1°\mathrm{C}\right)$ and Toluene$\left(110.6°\mathrm{C}\right)$.

Q.

Give one word

Pure liquid obtained by condensation from vapor during distillation

Q.

Water can be separated from alcohol by

1. Sublimation

2. Separating funnel

3. Fractional distillation

4. Paper chromatography.

Q.

Explain the working principle of distillation. Explain with the help of an example. [3 MARKS]

Q.

State the technique used for separating the following mixture:

Pure water from sea water

Q. A mixture of two miscible liquids, acetone and water having boiling points 56${}^{\circ }$ C and 100${}^{\circ }$C, is to be separated. Which of the following methods can be followed?

1. Crystallisation
2. Distillation
3. Separating Funnel
4. Sublimation

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> How will you separate a mixture containing kerosene and petrol, which are miscible with each other?

Q.

Give one word

The technique in which the liquid constituent of the mixture evaporates leaving behind the solid constituent

Q.

Dicky, Micky and Vicky had three liquids, A, B and C, respectively. They mixed these liquids and observed that they form a homogeneous mixture. They were unable to separate the liquids and asked their teacher to separate these for them. The teacher subjected the given mixture to fractional distillation. Liquid B was obtained in the receiver flask. One further distillation A was left behind in the distillation flask. On the basis of the result, comment on the critical temperatures of A, B and C in their respective gaseous states.

Q.

• Differentiate between the following

Simple distillation and fractional distillation

Q. When simple distillation method is used? Write the steps to separate acetone and water mixture by simple distillation.
[5 Marks]

Q. Which of the following mixtures are separated using crystallisation?

1. Oil and water
2. sand and iron fillings
3. Sugar and water
4. Sand and water

Q.

Give one word

Liquids that mix with each other to form a single layer.