1 (0) Higher the melting point of a substance,......will be the force
of attraction between its particles.
(ii) Particles from the bulk of the liquid gain energy to change
into......state.
(iii) Napthalene undergoes the process of..
2 Define vapourisation,
3 Why particles start vibrating in solids?
4 Convert the temperature of 70° C to the Kelvin scale.
5 What is the value of latent heat of fusion of ice?
6 Why burns caused by the steam are much more severe than
boiling water?
7 How gases can be liquefy?
8 What is the major factor which determines the state of matter?
Answers
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4
(1) stronger
(2) vapour state
(3) sublimation
2. it is a process when a chemical or substance change its liquid or solid to gas. this is of two types sublimation and evaporation
4. 70 +273 =343
5. 3.34×10^5 joules
6. steam contains the latent heat of vapourisation that is equal to the 3.34×10^5 joules which is more than the boiling temperature thats why steam causes more severe burns
The last two answers of your question is given in the NCERT book you can find out in the chapter 1
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