Reaction quotient.
It is the ratio between the product of the concentrations of product species to that of the reactant species at any stage of the reversible reaction other than equilibrium.
angle of contact.
It is defined as the angle between the tangent to the liquid surface at the point of contact and solid surface inside the liquid is called as angle of contact The value of angle of contact depends upon (i) Nature of solid and liquid in contact (ii) Cleanliness of the surface in contact (iii) Medium above the free surface of liquid
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