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प्रश्न
How will you separate a mixture of sodium chloride and sand ?
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उत्तर
Two processes are involved in separation of sodium chloride and sand, i.e., filtration followed by evaporation. The mixture of sodium chloride and sand can be separated by the following method:
- Take the mixture of sodium chloride and sand in a china dish. Pour some water in the mixture of sodium chloride and sand.
- After few seconds, all the sodium chloride will dissolve in water but sand will not.
- Then pour the contents of the container in a funnel fitted with a filter paper.
- Sand remains on the paper as residue and sodium chloride dissolved in water passes through it to the funnel.
- Now put the salt solution of the funnel on heat. Water starts getting evaporated leaving salt as residue in the funnel.
- Remove the funnel from heat.
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संबंधित प्रश्न
Define :- Miscible liquids
Differentiate between homogeneous and heterogeneous mixtures with examples.
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.
You are given a mixture of water, groundnut oil and common salt. How will you separate groundnut oil and common salt from it ?
Name the components present in the following mixture:
Crude petroleum oil
Give one example of the following type of mixture.
Solid-solid heterogeneous mixture
Write “true” or “false” for the following statement
Common salt is separated from its solution in water by decantation.
Name the following:
The component of a naphthalene-sodium chloride mixture, which remains in the evaporating dish when heated together, covered with a funnel.
How will you separate a mixture containing saw dust, naphthalene and iron filings?
Supernatant denotes the heterogeneous mixture, lying above a solid residue, after crystallization, precipitation, centrifugation, or another process.
