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प्रश्न
Give reasons:
We can easily move our hand in air, but to do the same through a solid block of wood, we need a karate expert.
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उत्तर
- We can easily move our hand in the air, but to do the same through a solid block of wood, we need a karate expert.
- It is because the molecules of air have less force of attraction between them, and a very small external force can separate them and pass through them.
- However, in solids, the molecules have the maximum force of attraction, and the particles are tightly bound due to this force. Hence, a large amount of external force is required to pass through the solid.
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संबंधित प्रश्न
Tabulate the differences in the characteristics of states of matter.
Give reasons:
A gas exerts pressure on the walls of the container.
Name two gases which are supplied in compressed form in homes and hospitals.
State whether the following statement is true or false :
Red-brown bromine vapour diffuse into air in a gas jar but the colourless air molecules do not diffuse into bromine vapour.
Fill in the following blank with suitable words :
Solid, liquid and gas are the three ........................ of matter.
Explain why, diffusion occurs more quickly in a gas than in a liquid.
When a gas jar full of air is placed upside down on a gas jar full of bromine vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment :
A substance has neither a fixed shape nor a fixed volume. State whether it is a solid, a liquid or a gas.
How does the substance of gaseous particles change to a liquid state?
Comment upon the following:-
density
