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प्रश्न
What is the name of the process in which a solid turns directly into a gas ?
उत्तर
The names of the processes are Solid turns into gas – sublimation.
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संबंधित प्रश्न
What do you mean by the change of state? Write the flow chart showing the complete cycle of change of state.
Is there any change in temperature during the change of phase?
Define the term 'latent heat of fusion' of a solid. How much is the latent heat of fusion of ice ?
Which of the following represent the suitable conditions for the liquefaction of gases ?
Define the following terms: Liquefaction
Give two examples of the following:
Substances which are rigid and not compressible
State which of the three states of matter Le. solids, liquids or gases – have
(a) No definite volume
(b) A definite shape
(c) High density
(d) No free surfaces
(e) Particles – which diffuse very easily.
With reference to the liquid state of matter – answer the following
The heat energy supplied to the liquid is absorbed by its molecule & stored as which form of energy.
Give the reason for the following
Solids cannot be compressed, but gases are highly compressible.
Prepare a model to demonstrate movement of particles in solids, liquids and gases.
For making this model you will need
- A transparent jar
- A big rubber balloon or piece of stretchable rubber sheet
- A string
- Few chickpeas or black gram or dry green peas.
How to make?
- Put the seeds in the jar.
- Sew the string to the centre of the rubber sheet and put some tape to keep it tied securely.
- Stretch and tie the rubber sheet on the mouth of the jar.
- Your model is ready. Now run your fingers up and down the string by first tugging at it slowly and then rapidly.
