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प्रश्न
Give reasons for the following:
Water on freezing turns into ice.
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उत्तर
Every pure substance has a fired melting point or boiling point.
संबंधित प्रश्न
Give reasons:
A gas can fill the whole vessel in which it is enclosed.
Give reason:
A red ink drop added to small amount of water in a glass turns water red in some time.
Fill in the blank:
The temperature at which a liquid boils is called the................. point of that liquid.
Write whether the following statement is true or false.
Only water can exist in three different states.
Write whether the following statement is true or false.
A gas has no free surface.
When an incense stick (agarbatti) is lighted in one corner of a room, its fragrance spreads in the whole room quickly. Which characteristic of the particles of matter is illustrated by this observation?
On what basis are the three states classified of matter.
Fill in the blanks:
Matter is defined as anything that occupies _______ and has _______
‘Inter-particle attraction between atoms of gases is very weak’. State five properties of gases which correlate as a consequence of the weak inter-particle attraction between particles of gases.
Mention any two characteristics of the particles of matter.
