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प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
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उत्तर
The smallest unit of matter that exists freely in nature is called molecule.
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संबंधित प्रश्न
Name the processes involved in two cases.
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
- swelling up of a raisin on keeping in water
- spreading of virus on sneezing
- 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
- aquatic animals using oxygen dissolved in water during respiration
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.
What is meant by saying that metals are lustrous ?
Name a metal which can be easily cut with a knife.
Name the property of one of the constituents which can be used to separate a mixture of salt and iodine
Name the process by which common salt is obtained from sea-water.
Differentiate between the-two characteristics of matter – ‘mass’ & ‘weight’.
The fluidity of solids: ______.
Define the term matter.
