Question

To separate the solids which are insoluble in liquids such that solid is heavier than liquid we should undergo the following process:
A) Sedimentation and decantation
B) Evaporation followed by condensation
C) Filtration
D) Condensation and crystallization

Answer 1

Hint:As we know that as we know that all the given processes are used to separate the mixture of light and heavy particles be it solid-solid, liquid-liquid or solid-liquid. In case of liquids-solid, when the solid settles down at bottom, the liquid portion is poured out or a simple filter paper is used to separate the two.


Complete answer:
As we know that various processes are used to separate the different compositions and mixture of heavy and light particles which can involve the particles having solid-solid phase, a liquid-liquid phase or a solid-liquid phase. So let us talk about the given processes one by one. The first one is sedimentation.
We are very well aware of the fact that the sedimentation process helps in separation of large solid particles from a mixture of solid and liquid where the mixture or the solution remained undisturbed for a long time. The larger particles would settle down at the bottom and the liquid would rise above it giving a clear appearance.
Then we have decantation which basically means removing the liquid obtained after the process of sedimentation or centrifugation leaving behind the solid particles which settled at the bottom.
Next we have Evaporation which is the process of separation of liquid particles where the water changes from a liquid phase to a gaseous phase or vapour phase and condensation is the opposite process of evaporation where the gaseous phase of water turns back into the liquid phase or liquid state.
Then we have filtration which is more or less similar to sedimentation where solid and liquid are separated from a mixture. But in this process a filter paper is used instead of decanting the liquid part directly. The insoluble particles remain above the filter paper and liquid passes through the filter paper.
Therefore, from the above explanation we can say that sedimentation, decantation and filtration processes can be used to separate the insoluble solids from liquids.

And hence, the correct answer is Option A and C.


Note:Remember that crystallization is the process that involves the organisation of atoms and molecules into a fine structure which is called crystal. Crystals are precipitated from liquid form to a solid form where the solid is first heated at a fixed temperature and then filtered and finally cooled down to result in crystals formation.