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प्रश्न
Define the following term of Atom .
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उत्तर
Atom — An atom is the smallest part of an element that takes place in a chemical reaction.
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संबंधित प्रश्न
Define the following term of Matter .
Write true or false for each statement. Rewrite the false statement correctly.
Matter cannot exist in different states.
What are the conditions for 'something' to be called 'matter'?
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?
Which one of the following is not a metalloid ?
Which of the following does not have a fixed melting point/boiling point ?
In the following set of substances, one item does not belong to the set. Select this item and explain why it does not belong to the set :
Hydrogen, Oxygen, Steam, Chlorine
What is the name of the clear liquid formed when a solid dissolves in a liquid ?
Choose one term from the following which includes the other three :
aerosol, emulsion, colloid, sol
What do you understand by the statement " the solubility of copper sulphate in water at 20°C is 20.7 g" ?
Describe the various steps involved in the separation of iodine, iron filings and salt from a mixture.
Explain how, nitrogen , oxygen and argon gases are separated from air.
What's the solution?
We need to make a sherbet quickly for some guests. But we only have sugar candy in the house.
Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
Gases do not diffuse very easily.
Define the term matter.
Define the term matter.
