MEDIUM
6th CBSE
IMPORTANT
Earn 100

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:

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Important Questions on Separation of Substances

MEDIUM
6th CBSE
IMPORTANT
Tincture of iodine is a weak solution of iodine in alcohol. Iodine can be recovered from tincture of iodine by the process of :
EASY
6th CBSE
IMPORTANT
Which one of the following is not a method of separating mixtures?
HARD
6th CBSE
IMPORTANT
The sample of water collected from a shallow pond has some tiny particles A suspended in it. When a piece of substance B tied to a thread is rotated in this sample of water kept in a beaker, then the suspended particles settle down at the bottom of the beaker quite rapidly. This process is called C. The clear water is then separated from the settled particles by the technique D.
(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.
HARD
6th CBSE
IMPORTANT
The mixture of a powdered white solid P and a liquid Q can be separated filtration. The solid P is left behind on the filter paper but clear liquid Q passes through the filter paper and collects in the beaker kept below.
(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?
MEDIUM
6th CBSE
IMPORTANT
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?
HARD
6th CBSE
IMPORTANT

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?

HARD
6th CBSE
IMPORTANT

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?