hard a level chemistry question! PLEASE HELP

From the multiple choice section on an OCR A2 inorganic paper.

Which substances experience induced dipole dipole interactions?
1- c2h5oh (ethanol)
2-h20
3- SiO2

the answer is 1 and 2, so not SiO2 but I don't know why? I thought all compounds experienced induced d-d interaction.
please help lol

Reply 1

username1817907

Only simply molecular structures experience intermolecular forces.

Silicon dioxide has a giant covalent lattice structure, therefore does not experience IMFs so induced dipole dipole interactions cannot be present between SiO2 molecules.

Reply 2

Alstair

All do experience induced dipole dipole, are you sure that the question wasn't about permanent dipole dipole because SiO2 doesn't experience permanent dipole dipole while the other two do.