
One of the following mixtures cannot be separated by the three steps: stirring with water, filtration and evaporation, applied one after the other. This mixture is most likely to be that of:


Important Questions on Separation of Substances


(a) What could the particles A be?
(b) Name the substance B.
(c) What is the name of process C?
(d) Name the technique D.

(a) Name one solid which could be like P.
(b) Name the liquid which Q could be.
(c) What name is given to the solid left on the filter paper?
(d) What name is given to the clear liquid collected in the beaker?


A mixture contains two components W and X. The component W is a white solid which is soluble in water. It is obtained on a large scale from sea-water by the process Y. The component X consists of tiny pieces called filings which can be attracted and removed from the mixture by a device Z.
(a) What do you think is component W?
(b) Name the process Y.
(c) Name the component X.
(d) What could the device Z be?

Component A dissolves in component B to form a liquid mixture. If this mixture is subjected to a process C, then only component A can be recovered. But if this mixture is subjected to another process D, then both the components A and B can be recovered from their mixture.
(a) Name one component which could be like A.
(b) Give one example of a component like B.
(c) Name the process C.
(d) What could process D be?
