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Question
What is diffusion? Give an example to illustrate it.
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Solution
Diffusion is the process of gradual mixing of two substances, kept in contact, by molecular motion.
Example:
If a jar of chlorine is opened in a large room, the odorous gas mixes with air and spreads to every part of the room. Although chlorine is heavier than air, it does not remain at the floor level but spreads throughout the room.
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Column A |
Column B |
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(a) |
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(i) Pressure |
|
(b) |
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|
(c) |
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|
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|
|
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Fill in the blanks:
If the temperature is reduced to half, ………….. would also reduce to half.
A gas occupies 500 cm3 at a normal temperature. At what temperature will the volume of the gas be reduced by 20% of its original volume, the pressure is constant?
Give reason for the following:
Volumes of gases are converted into s.t.p. conditions and then compared.
Show that for monoatomic gas the ratio of the two specific heats is 5:3.
The volume V of an enclosure contains a mixture of three gases, 16 g of oxygen, 28 g of nitrogen and 44 g of carbon dioxide at absolute temperature T. Consider R as universal gas constant. The pressure of the mixture of gases is ______.
P ∝ T at constant volume is the statement of ______.
