Question

Check it please
this your class 9th student
please fast solve it​

Answer 1

Answer:

1. A mass of very small drops of liquid in air is know as Vapour.
2. Temperature at which liquid change to solid- 0°C. Temperature at which Solid change into Liquid is 4°C or more than it.
3. The pressure of gas above the liquid affect the boiling point. The boiling point increases with in pressure and also decreases with pressure as it directly proportional to pressure.
4. Iodine, Dry ice , menthol etc. are Sublime substance.
5. Condensation is the process by which gas change into Liquid. It is reverse of Evaporation. It is form when small drops of water touches a cold surface.
6. It is due to the latent heat as the heat supplied to increase the temperature of the substance is used up to transform the state of matter of substance, hence the temperature stay constant.

Well, this was the question of 9 standard and I am in 7 standard who answers.

anyway, hope it's helpful

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