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प्रश्न
How will you differentiate between a suspension and a colloid ?
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उत्तर
The particles of a suspension cannot pass through a filter paper whereas particles of colloids can easily pass through filter paper. Colloidal solutions are quite stable whereas suspensions are very unstable.
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संबंधित प्रश्न
Intermolecular force of attraction is maximum in ............ less in .......... and the least in .............
Liquids have definite shape and definite volume.
Fill in the blank
All matter is made up of tiny particles called ______
Which of the following materials fall in the category of a “pure substance”?
- Ice
- Milk
- Iron
- Hydrochloric Acid
- Calcium oxide
- Mercury
- Brick
- Wood
- Air
Classify the following into elements, compounds and mixtures:
- Sodium
- Soil
- Sugar solution
- Silver
- Calcium carbonate
- Tin
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When a crystal of potassium permanganate is placed at the bottom of water in a beaker, the water in the whole beaker turns purple on its own, even without stirring. This is an example of :
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.
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- 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?
Name a metal which is soft and a non-metal which is hard.
Name the property which enables metals to be drawn into wires.
What is meant by saying that non-metals are brittle ?
Name one element, one compound and one mixture.
Name two solid, two liquid and two gaseous elements at the room temperature.
State whether the following statement is true or false :
Sponge is an example of solid sol.
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Fill in the following blanks with suitable words :
Miscible liquids are separated by .....................
Justify your answer.
| Figure 1 | Figure 2 | Figure 3 |
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The arrangement of particles in three different phases of matter is shown above.
- Which state is represented by Fig. 1?
- In which state will the inter-particle attraction be maximum?
- Which one of them cannot be contained in an open vessel?
- Which one can take the shape of its container?
Solids possess very high kinetic energy.
The pressure of gases does not depend on the temperature of the gas and the volume it occupies.
