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प्रश्न
How will you separate a mixture containing saw dust, naphthalene and iron filings?
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उत्तर
When a magnet is brought near the mixture containing saw dust naphthalene and iron filings, it attracts the iron filings. Thus iron filings are separated.
The mixture of naphthalene and saw dust are put in a china dish and covered with a perforated asbestos sheet. An inverted funnel is placed over the asbestos sheet.
The open end of the stem of the funnel is closed, using cotton wool. The china dish is heated. The pure vapours of naphthalene solid pass through the holes in the asbestos sheet and condense on the inner side of the funnel. The saw dust is left in the china dish.
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संबंधित प्रश्न
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.
Name the process you would use to separate a mixture of two miscible liquids (like acetone and water).
Give reason:
Why do sugar and water retain their individual properties in a sugar solution?
Name the components present in the following mixture:
Crude petroleum oil
Define Miscible liquids
Write “true” or “false” for the following statement
Winnowing is a process to remove small stones from grains.
State whether the following statement is true or false. If false write – the correct statement.
Mixture has no definite set of properties.
Under which category of mixtures will you classify alloys and why?
Mixtures are impure substances.
A mixture does not have a fixed ______.
