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प्रश्न
Define the following:
Pure substance
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उत्तर
Pure substance: “Pure Substance is either element or compound. It contains the same kind of atom or molecules and has a definite set of physical and chemical properties.”
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संबंधित प्रश्न
What is meant by a substance?
Classify the following materials as homogeneous mixtures and heterogeneous mixtures :
Soda-water, Wood, Air, Soil, Vinegar, Alcohol and water mixture, Petrol and water mixture, Chalk and water mixture, Sugar and water mixture, Copper sulphate solution.
Which of the following are homogeneous in nature ?
- ice
- wood
- soil
- air
Name the process you would use to separate ammonium chloride from a mixture of sodium chloride and ammonium chloride.
Name the property of any one of the components which can be used for separating the following mixture :
Salt and Camphor
A mixture of milk and groundnut oil can be separated by :
Four atoms of hydrogen combine with one atom of carbon to give methane [CH4]. State the valency of carbon.
Give a reason for the following statement:
Gunpowder is an example of a heterogenous mixture.
How will you separate a mixture containing saw dust, naphthalene and iron filings?
Suggest separation technique(s) one would need to employ to separate the following mixture.
Common salt, water and sand
