Q13 How would you show that the three states of matter are interchangeable?
Q14 Under what conditions gases can be liquified? In which form LPG is filled in a gas
cylinder?
Q15 What are the three characteristics of matter?
Q16 Why should we wear cotton clothes in summer?
017 Why is ice at 273K more effective in cooling than water at the same temperature?
Q18 Differentiate between solids, liquids and gases on the basis of any eight properties.
Q19 Define evaporation. Write any four factors affecting evaporation.
Q20 With the help of an activity,describe sublimation.
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Answer:
Answer 13
Explanation:
On heating a solid substance and then cooling the vapours finally formed we can show that the three states of matter are interchangeable. For example, take ice crystals in a beaker and heat. Ice changes into water. On further heating water changes into steam. On cooling, water vapour again changes into water and water to ice.
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Answer:
Explanation:
Write any four propert
ies of water answer please
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