The given mixture contains three constituents A, B and C. The constituent A is a yellow coloured, solid element which dissolved in a liquid D. The constituent B is a blue coloured salt which is insoluble in liquid D but dissolves easily in another liquid E. The constitudent C is a liquid which is used in cooking food and forms a solid fat on hydrogenation.

(a) What do you think could (i) constituent A, and (ii) liquid D be ?
(b) What could (i) constituent B, and(ii) liquid E be ?
(c) What could liquid C be ?
(d) How will you separate the mixture containing A, B and C ?

Open in App

Solution

(a)(i) Constituent A is yellow coloured solid element. It could be sulphur.
(ii) Sulphur dissolves in liquid D. So, liquid D could be carbon disulphide.

(b) (i) Constituent B is a blue coloured salt, which is insoluble in carbon disulphide but dissolves in water. So, it could be copper sulphate.
(ii) Liquid E could be water as it dissolves copper sulphate.

(c) Liquid C could be vegetable oil as it turns into a solid fat on hydrogenation.

(d) We will separate the mixture containing A, B, and C by following process:

At first, we filter the mixture of A, B, and C.

Vegetable oil C, being liquid, will be obtained as a filtrate.

Residue consists of A (sulphur) and B (copper sulphate).

We add water to the residue and shake it before filtering. A (sulphur) is obtained as residue.

Now, we evaporate filtrate to obtain B (copper sulphate).

Suggest Corrections

Similar questions

Q. A, B and C are all liquids. Liquid A has a comparatively low boiling point. On heating, liquid A vaporises completely without leaving behind any residue. Liquid A is being used increasingly as a fuel in motor vehicles either alone or by mixing with petrol. Liquid B has a very high boiling point. It also vaporises completely on heating, without leaving any residue. Liquid B is a conductor of electricity and used in making thermometers. Liquid C has a moderate boiling point. On heating, liquid C vaporises leaving behind a white solid D which is used in cooking vegetables. The condensation of vapours from C give a liquid E which turns anhydrous CuSO₄ to blue.

(a) Which liquid could be an element? Name this element.
(b) Which liquid could be a mixture ? Name this mixture.
(c) Which liquid could be a compound ? Name this compound.
(d) What could the solid D be ?
(e) What do you think is liquid E ?

Q. There are three liquids A, B and C, all having different densities and different boiling points. Liquids A and C are organic in nature whereas liquid B is considered to be inorganic. When liquids A and B are put together in a container, they form a single layer. On the other hand, when liquids B and C are mixed, they form two separate layers :

(a) Which process will you use to separate a mixture of A and B ?
(b) Which method will you use to separate a mixture of B and C ?
(c) Name the liquids which would behave like (i) A (ii) B and (iii) C.

Match the entries of column I with column II.

Mixtures	Methods to separate mixtures
(a) Solid-liquid mixture (insoluble solid)	(i) Sublimation
(b) Liquid-liquid mixture (miscible liquids)	(ii) Separating funnel
(c) Solid-solid mixture (one component is more volatile)	(iii) Filtration
(d) Liquid-liquid mixture (immiscible liquids)	(iv) Distillation

Q. Fill in the following blanks with suitable words :
(a) Miscible liquids are separated by .........................
(b) Immiscible liquids are separated by using a ........................
(c) A mixture of kerosene and petrol can be separated by ........................
(d) The separation of liquids by fractional distillation is based on the difference in their ............................
(e) The gases of air can be separated by fractional distillation of liquid air because they have different ......................
(f) A heterogeneous mixture of liquid and solid is conveniently separated by ............................
(g) If a mixture contains iron filings as one of the constituents, it can be separated by using a .......................

Question 35
Colligative properties are observed when .......... .
(a) a non-volatile solid is dissolved in a volatile liquid
(b) a non-volatile liquid is dissolved in another volatile liquid
(c) a gas is dissolved in non-volatile liquid
(d) a volatile liquid is dissolved in another volatile liquid

Join BYJU'S Learning Program