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प्रश्न
Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
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उत्तर
Miscible liquids are separated by fractional distillation.
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संबंधित प्रश्न
What is the scientific name of particles which make up mater?
Describe in your own words, what happens to the particles when salt dissolves in water.
When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.
- What could particles X be ?
- What do you think liquid Y is ?
- What is the zig-zag movement of X known as ?
- What is causing the zig-zag movement of particles X ?
- Name the scientist who discovered this phenomenon.
- What does this experiment tell us about the nature of liquid Y?
You are given two liquids, one a solution and the other a compound. How will you distinguish the solution from the compound ?
Name a metal which can be easily cut with a knife.
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
Which of the following are compounds ?
- CO
- No
- NO
- Co
Which of the following statements are true for pure substances ?
- pure substances contain only one kind of particles
- pure substances may be compounds or mixtures
- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
Define solvent.
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
Which of the following will show Tyndall effect ? Why ?
- Salt solution
- Starch solution
- Milk
- Copper sulphate solution
Which of the following can be called a suspension ?
Describe a method to separate a mixture of common salt and sand.
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
How will you separate a mixture of iron filings, chalk powder and common salt ?
Explain how, impure copper sulphate can be purified by crystallisation.
You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture ?
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
The property which allows the metals to be hammered into their sheets is ______.
Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compounds or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
