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प्रश्न
Give reasons for the following:
A bottle of perfume on opening evolves an odour which can be sensed over a long distance.
उत्तर
A bottle of perfume on opening evolves an odour because gases diffuse very easily and odour spreads over a large distance.
संबंधित प्रश्न
Give reason:
When an empty gas jar is inverted over a gas jar containing a coloured gas, the gas also spreads into the empty jar.
Fill in the blank:
Water boils at ............
Write whether the following statement is true or false.
There is no difference between evaporation and boiling.
Give two examples of the following:
Substances which do not change their states.
What is the relation between intermolecular space and intermolecular force ?
Give reason of We can walk through air.
Write true or false for each statement. Rewrite the false statement correctly.
If the intermolecular space is more than the intermolecular force will be weaker.
Fill in the following blank with suitable words :
The smell of perfume gradually spreads across a room due to .....................
Describe simple experiment to show that particles of matter are closely packed in solids and less in liquids.
State in which of the following examples ie. a piece of wood, water, light gas is the Energy possessed by particles of matter, very large.
