You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard VI

Chemistry

Separation of Mixtures

An unknown so...

Question

An unknown solid substance X is added to a beaker containing liquid oil and stirred. After some time, X settles at the bottom of the beaker. Which of the following methods cannot be used to separate X from oil?

Decantation

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Winnowing

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Filtration

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Evaporation

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B Winnowing
Sedimentation is a process by which heavier particles present in a liquid settle down at the bottom of the container containing the mixture.

X solid settles at the bottom of the beaker filled with oil even after stirring. This implies that, X is heavier and is insoluble in oil. After sedimentation of X, the oil above it can be collected by the process of decantation.

Since X solid is insoluble in oil, so it can also be separated from the oil using filtration.

X solid can also be separated from oil if all the oil is removed. This can be done by evaporating the oil. Therefore, evaporation can also be used for separation.

Winnowing is the process of separating solid-solid mixtures, where heavier components are separated from lighter components using wind or blowing air. Here X is a solid, but oil is a liquid. Therefore, winnowing cannot be used for separation.

Suggest Corrections

Similar questions

Q. Two identical beakers labeled as

(X)

and

(Y)

contain

100 {c m}^{3}

of water each at

20^{o} C

. To the water in the beaker

(X)

100 g

of water at

0^{o} C

was added and stirred to mix thoroughly. To the beaker

(Y)

100 g

of ice at

0^{o} C

was added and stirred till it melted into water. The water in the beaker

(Y)

will be:

Q. Select the correct option:

An unknown liquid collected from a sample of peas, is added to a beaker of water and is vigorously shaken. After few minutes, water and the unknown liquid made two separate layers. To which class of biomolecules, does the unknown liquid most likely belongs?

Q. We have three beakers containing glycerine, water and kerosene separately. They are stirred vigorously and placed on a table. The liquid which comes to rest at the earliest is

100 mL of water at room temperature of $25^{\circ} C$ is taken in a beaker and a little of solid S is dissolved in it by stirring to obtain a solution X. More and more of solid S is added to the solution with constant stirring while keeping the temperature of solution constant at $30^{\circ} C .$ After some time it is observed that no more solid dissolves in water and at the same time some solid is also left undissolved at the bottom of the beaker. The contents of beaker are filtered through a filter paper to obtain solution Y in the form of a filtrate.

(a) What name is given to solutions like X?

(b) What name is given to solutions like Y?

(c) What will you observe if the solution Y at $30^{\circ} C$ is cooled down to $10^{\circ} C$ by keeping the beaker in crushed ice? Why?

(d) What term is used to denote the amount of solid dissolved in 100 grams of water in a solution like Y?

Q. The white of an egg, common salt, sugar and fine sand are added to water separately in beakers as shown below. The mixture is stirred well. A suspension will be formed in the beaker :

(1) I
(2) II
(3) III
(4) (IV)

Join BYJU'S Learning Program

An unknown solid substance X is added to a beaker containing liquid oil and stirred. After some time, X settles at the bottom of the beaker. Which of the following methods cannot be used to separate X from oil?​

An unknown solid substance X is added to a beaker containing liquid oil and stirred. After some time, X settles at the bottom of the beaker. Which of the following methods cannot be used to separate X from oil?