A) in this experiment, it is important that the benzaldehyde used should be pure. benzaldehyde is easily oxidized by air and produces a white crystalline material. what is the name of this oxidation product?
b) what safety precautions should you take when working with sodium hydroxide solutions?

intermolecular forces are the forces between molecules or particles.

there are two kinds of van der waals forces: weak london dispersion forces and stronger dipole-dipole forces.

in molecule of water there are dipole-dipole forces between negatively charged oxygen from one molecule of water and positively charger hydrogen of another molecule of water.

hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (h), covalently bound to a highly electronegative atom such as flourine (f), oxygen (o) and nitrogen (n) atoms.