Madam Curie was studying solution chemistry. She was reading that dissolution happens with ionic crystals in water where ions are separated and the salt gets dissolved.
She had some magnesium oxide (MgO) crystals lying around. Being a scientist, she decided to test it out. She tried to mix MgO with water but she observed that MgO did not mix with water. She was bewildered.
But she soon realized the reason.
What could be the reason?
Select from the following options: