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प्रश्न
What do you observe when a gas jar which appears empty is inverted over a gas jar containing Bromine vapours? Name the phenomenon.
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उत्तर
When a gas jar full of bromine vapours (reddish brown) is inverted over a gas jar containing air over it. It is observed that after sometime, the reddish brown vapours of bromine also spread out into the upper jar. This mixing is called diffusion. The rate of diffusion is the fastest in gases and the slowest in solids. It increases with an increase in temperature.
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संबंधित प्रश्न
Fill in the blank:
The process in which a solid directly changes into a gas is called ....................
Match the following
| Column A | Column B |
| (a) Solids | (1) Can flow in all directions. |
| (b) Sublimation | (2) The temperature at which a liquid changes into its gaseous state. |
| (c) Boiling point | (3) Any number of free surfaces. |
| (d) Gases | (4) Gaps between particles. |
| (e) Intermolecular space | ro(5) Change of state fm solid to gas. |
Write whether the following statement are true or false.
Intermolecular force of attraction is greater in gases than in liquids.
When sugar is dissolved in water, there is no increase in the volume. Which characteristic of matter is illustrated by this observation?
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?
Define: interconversion of states of matter.
Give reasons for the following:
Solids have a definite shape and are highly rigid while gases have to definite shape and are least rigid.
State in which of the three states of matter:
The space between the particles is minimum.
With reference to the liquid state of matter – answer the following
State why the inter-particles attraction decreases to negligible.
Mr. Raghu returns home on a hot summer day and wants to have buttermilk. Mrs. Raghu has the only curd. What can she do to get buttermilk? Explain
