Question

What is the effect of impurities on angle of contact​

Answer 1

Answer:

Surface tension generally decreases on increasing the temperature i.e adhesion increases. Hence, angle of contact will increase. In case of impurities, when a highly soluble impurity like NaCl is added to water, surface tension increases whereas it decreases for sparingly solube (eg: phenol) or insoluble impurities.

Answer 2

$\huge\underline\orange{\mathcal Answer}$

Effect Of Impurities on the Angle of Contact :-

• Solute impurities on surface tension so cos@ decrease and angle of contact decrease

• Partially solute impurities decrease surface tension decrease.