Aconcept map for four types of intermolecular forces and a certain type of bond is shown.

which of the following correctly identifies the intermolecular force represented by a and compares its strength relative to the intermolecular force represented by b?

a represents london dispersion forces, which are weaker than the force represented by b.
a represents hydrogen bonding, which is weaker than the force represented by b.
a represents london dispersion forces, which are stronger than the force represented by b.
a represents hydrogen bonding, which is stronger than the force represented by b.

A represents London dispersion forces, which are weaker than the force represented by B.

Explanation:

London Dispersion Forces : Intermolecular forces exist  between non-polar molecules.  They are very weak forces.  Thought to be arise from the  motion of electrons.

H-bonding: It is a special type of dipole-dipole interaction  between the H-atom in a polar bond such as N-H,  O-H, F-H and an electronegative atom such as  nitrogen, oxygen and fluorine.

It is clear that H-bonding is stronger than London-dispersion.

So, the right choice is:

A represents London dispersion forces, which are weaker than the force represented by B.

the mass of the cathode increases because ions from the solution get reduced to atoms and become part of the cathode.

explanation:

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