Question

How can we obtain colored components from blue/black ink?
A. By distillation.
B. By evaporation.
C. By sedimentation.
D. By centrifugation.

Answer 1

Hint: We know that if there is a change temperature or pressure of the system phase also gets change. If the temperature or pressure increases the interaction between molecules also increases. Likewise, if the temperature or pressure decreases molecules move freely and the atoms settle into a more rigid structure.

Complete step by step answer: Now we can see how distillation, evaporation, sedimentation and centrifugation differ from each other. First we see the details about the distillation process.
Distillation:
This method is used to separate the components of a mixture containing two miscible liquids. In this method, the liquid mixtures are boiled, vaporized, condensed, and isolated.
Therefore, option (A) is incorrect.
Now we can discuss the sedimentation process.
Sedimentation:
It is a technique in which heavier impurities in water settle down at the bottom of the apparatus. The constituent which is settled down is called sediment and the water which presents above sediment is called supernatant.
Therefore, option C is incorrect.
Now we discuss the details of evaporation.
Evaporation:
This method is used to separate the mixtures in which the solvent is liquid and the solute is soluble solid.
Evaporation may be a useful method to get a colored component (dye) from blue/black ink. The ink may be a sol - a heterogeneous mixture of dye and water. When this mixture is heated, water evaporates and dye is overlooked.
Therefore, option (B) is correct.
Now we can see the details about the centrifugation process.
Centrifugation:
The technique which is used for the separation of particles from a solution depending on their size, shape, density, the viscosity of the medium is called centrifugation.
Therefore, option D is incorrect.
So, the correct answer is “Option B”.

Note: We must remember that the colored components can be separated by another method by chromatography. The principle of chromatography is that the colored components are more soluble in water increases by using this principle the colored substances in the blue and black dye are separated.