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प्रश्न
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
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उत्तर
A colloid is a heterogeneous mixture and its components can be separated by the technique known as centrifugation.
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संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Name the terms for the particles of matter which may or may not have independent existence.
Fill in the following blank with suitable words :
The best evidence that the particles of matter are constantly moving comes from the studies of ................. and ...................
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?
What is meant by (i) elements (ii) compounds, and (iii) mixtures ?Write down the names of two elements, two compounds and two mixtures.
Classify the following into elements, compounds and mixtures :
arble, Air, Gold, Brass, Sand, Diamond, Graphite, Petroleum, Common salt, Sea-water, Chalk
State whether the following statement is true or false :
Bread is an example of solid foam.
Choose one term from the following which includes the other three :
aerosol, emulsion, colloid, sol
Which of the following is a sol ?
Shaving cream, Milk, Fog, Soap solution, Hairspray
How will you differentiate between a suspension and a colloid ?
Define Sol and give one example.
One of the following represents the solution of solid in a solid. This one is :
What difference in the property of two miscible liquids enables their separation by fractional distillation ?
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 ?
______ is not made of matter.
The particles in the matter are extremely small and can be seen even with a powerful microscope.
What type of matter glass is?
Compressibility of solids: ______.
Define the term matter.
Write scientific reason.
Lemon sherbat has sweet, sour and salty taste and it can be poured in a glass.
