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प्रश्न
The constituents of a mixture are present in a fixed ration.
पर्याय
a fixed ratio
a variable ratio
the ratio of 2:1
none of these
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उत्तर
a variable ratio
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संबंधित प्रश्न
Which one of the following is most likely to exhibit Tyndall effect ?
Three mixtures A, B and C are obtained by stirring three different solids in water taken in separate beakers. When mixture A is allowed to stand for some time, then its particles settle at the bottom of the beaker. When a beam of light is passed through mixture A in a dark room, the path of light becomes visible when observed from the side of the beaker. When mixture B is allowed to stand for a considerable time, even then its particles do not settle down. Mixture B, however, scatters the beam of light just like mixture A. The particles of mixture C do not settle down on keeping and it also does not scatter a beam of light passing through it.
What are the mixtures like A known as ?
What are the mixtures like B known as ?
What are the mixtures like C known as ?
Name the phenomenon exhibited by A and B which occurs on passing a beam of light through them.
Name one mixture each which is like (i) A (ii) B, and (iii) C.
The chemical which can be used to separate a mixture of carbon powder and sulphur powder successfully is :
Define the following:
Impure substance
Name two substances soluble in water.
Write “true” or “false” for the following statement
Common salt is separated from its solution in water by decantation.
With reference to the mixture of iron and sulphur, state the main characteristics of the mixture.
Write the sequence of steps you would use for making tea. (Use the words: mixture, dissolve, filtrate and residue).
Why do we need to separate different components of a mixture? Give two examples.
You are given two samples of water labelled as ‘A’ and ‘B’. Sample ‘A’ boils at 100°C and sample ‘B’ boils at 102°C. Which sample of the water will not freeze at 0°C? Comment.
