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Q 5.     What is the physical state of water at-

            (a) 25°C          (b) 0°C          (c) 100°C ?

Answers (1)

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The primary physical state of water is liquid. It converts into gaseous state at a temperature above 100 ^0C but at this temperature, it (liquid water) is in equilibrium with the gaseous state.

And Below 0 ^0C it changes into solid and also at this temperature it (liquid water) is in equilibrium with the solid state. 

Therefore;

(i) At 25 ^0C water is in the liquid state

(ii) At 0^0C it can be liquid or solid and

(iii) At 100 ^0C it can be liquids or the gaseous state.

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manish

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