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प्रश्न
How will you separate a mixture containing saw dust, naphthalene and iron filings?
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
‘‘The properties of the product are different from those of the constituents''. State whether this statement best describes an element, a compound or a mixture.
Which of the following can be separated by using a separating funnel and which cannot be separated by using a separating funnel ?
- water and kerosene mixture
- water and acetone mixture
Give reasons for your answer.
List four characteristics of a mixture.
Why do we need pure substances?
Name two substances soluble in water.
Tick (√) the correct alternative from the choice given for the following statement:
A mixture of mustard oil and water forms
State the principle involved in separation of solid-solid mixtures by Sublimation
Name the following
A black non-metallic component of the mixture gunpowder.
Name the following:
A mixture of two immiscible liquids
Give an example for mixture and justify your answer with reason.
