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Matter In Our Surroundings
Suggest a method to liquefy atmospheric gases.
In liquid, the particles are closer to each other and have lower kinetic energy than gases. When pressure is applied to gas particles they move closer and loose K.E. and thus change to their liquid state. It is possible to liquefy any gas. i.e., convert gas into liquid by increasing the pressure and decreasing the temperature.
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Suggest a method to liquify atmospheric gases.
Convert the following temperatures to Kelvin scale.
35°C
Give reason for the following observations.
Naphthalene balls disappear with time without leaving any solid.
Give reason for the following observations.
We can get the smell of perfume sitting several metres away.
What is the physical state of water at
a) 25°C
b)00C
c)1000C
What is the physical state of water at
0°C
What is the physical state of water at
100°C
Give two reasons to justify
Water at room temperature is a liquid.
Give two reasons to justify
An iron almirah is a solid at room temperature.
Why is ice at 273K more effective in cooling than water at the same temperature ?
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