Question

question 18 (1 point)
how does the tilt angle compare between polar and nonpolar substances?
a polar substances have a higher tilt angle before the droplet starts to slide
b polar substances have a lower tilt angle before the droplet starts to slide
c nonpolar substances have a higher tilt angle before the droplet starts to slide
question 19 (1 point)
why do polar droplets show greater adhesion to the surface

Explanation:

Polar substances have stronger intermolecular forces (such as hydrogen - bonding or dipole - dipole forces) with the surface compared to non - polar substances. Stronger adhesion leads to a lower tilt angle before the droplet starts to slide.

Answer:

b. Polar substances have a lower tilt angle before the droplet starts to slide