Question

what force in liquids causes surface tension?
covalent forces
intermolecular forces
intramolecular forces
ionic forces

Explanation:

Surface tension in liquids is caused by the net - inward force on surface molecules due to intermolecular forces. Covalent and intramolecular forces act within a molecule, while ionic forces are a type of intramolecular force for ionic compounds. Intermolecular forces between liquid molecules lead to surface tension.

Answer:

B. intermolecular forces