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प्रश्न
Name a non-metal which is a good conductor of electricity.
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उत्तर
Graphite is a non-metal that is a good conductor of electricity.
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संबंधित प्रश्न
Define the term matter. What is it composed of?
An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.
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?
Name a metal which forms amalgams.
Name a metal which is yellow in colour.
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 Sol and give one example.
Define Foam Give one example.
Differentiate between a saturated and an unsaturated solution. How will you test whether a given solution is saturated or not ?
One of the following does not show Tyndall effect. This one is :
One of the following represents the solution of solid in a solid. This one is :
Describe a method to separate a mixture of camphor and sand.
How will you separate a mixture of iron filings, chalk powder and common salt ?
How is water purified on a large scale at water works ? Explain with the help of a labelled diagram. Name the substance which is added to kill germs in the drinking water supply ?
The boiling point of liquid argon is :
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
Solids possess very high kinetic energy.
Higher the temperature, the higher the kinetic energy of particles.
Evaporation does form bubbles.
Define the term matter.
