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प्रश्न
Why do we need to separate different components of a mixture? Give two examples.
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उत्तर
Different components of a mixture are separated in order to either separate the un-required components from a mixture or sometimes, to separate more than one useful component from a mixture.
For example, grain purchased from shops can contain several impurities such as pieces of stone, husk, broken grains, etc. Thus, grain is separated from these impurities to make it edible.
Similarly, after preparing tea, we strain it to remove the used tea leaves from tea.
संबंधित प्रश्न
What is the major difference between a solution and an ordinary mixture ?
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.
Milk is an example of a type of matter called ______.
Define the following:
Impure substance
Give two examples of the following type of mixture.
solid-liquid
Write “true” or “false” for the following statement
Common salt is separated from its solution in water by decantation.
Differentiate between homogeneous and heterogeneous mixtures with suitable examples.
Differentiate between a homogenous and a heterogeneous mixture with one example of each in the (a) solid-solid (b) solid-liquid If (c) liquid-liquid state of the mixture.
Complete the given analogy.
Iron – sulphur mixture : ______:: Mustard seeds from Urad-dhal: Rolling
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
