There are four mixtures A, B, C and D. The mixture A contains sand and sugar, mixture B contains chalk powder and salt, mixture C contains salt and sugar, whereas mixture D contains sugar and charcoal powder. Which one of these mixtures cannot be separated by using water as solvent? Why?
Important Questions on Separation of Substances
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?
