A mercury drop does not spread on a glass pla | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The angle of contact is the angle between the tangent to the liquid surface at the point of contact and the solid surface inside the liquid. For a

Vedclass · Accepted Answer

Obtuse

Vedclass · Answer

(B) The angle of contact is the angle between the tangent to the liquid surface at the point of contact and the solid surface inside the liquid. For a liquid that does not wet the solid surface,the cohesive forces between liquid molecules are stronger than the adhesive forces between the liquid and solid molecules. In the case of mercury and glass,the angle of contact is approximately $135^\circ$ to $140^\circ$,which is an obtuse angle. Because the angle of contact is obtuse,the mercury drop tends to minimize its contact area with the glass,causing it to remain as a drop rather than spreading.

$A$ mercury drop does not spread on a glass plate because the angle of contact between glass and mercury is

Similar Questions

The angle of contact is $120^{\circ}$ when a cylindrical rod is vertically placed in a liquid. If the same rod is placed horizontally in the liquid, then the angle of contact is (in $^{\circ}$)

$A$ liquid is filled in a spherical container of radius $R$ up to a height $h$. At this position,the liquid surface at the edges is horizontal. The contact angle is:

$A$ hydrophilic surface is characterised by the contact angle at the water-solid interface. The value of the contact angle should be:

Why does a raincoat not get wet in the rain?

$A$ liquid does not wet the solid surface if the angle of contact is

Vedclass Test Series

Exam Paper Generator

Online Exam Module