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प्रश्न
Define the following term of Atom .
उत्तर
Atom — An atom is the smallest part of an element that takes place in a chemical reaction.
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संबंधित प्रश्न
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
Give one difference between atoms and molecules.
Define the following term of Matter .
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
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- earthworm dying on coming in contact with common salt
- shrinking of grapes kept in thick sugar syrup
- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
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What is meant by saying that metals are lustrous ?
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Define Foam Give one example.
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Which of the following mixture cannot be separated by using water as the solvent ?
What's the solution?
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| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
Define the term matter.
Define the term matter.
