1.

What are the Factors Affecting Surface Tension ?

Answer»

(1) Temperature : The surface tension of liquid decreases with rise of temperature 

Tt = T0 (1 – α t) 

where Tt , T0 are the surface tensions at t°C and 0°C respectively and α is the temperature coefficient of surface tension. 

(2) Impurities : A highly soluble substance like sodium chloride when dissolved in water, increases the surface tension of water. But the springly soluble substances like phenol when dissolved in water, decreases the surface tension of water.



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