Answer: (1)
Two of an oxygen atom’s six electrons are bound to a hydrogen atom, leaving two lone pairs of electrons. The bond angle in H2O is 104.50 due to the presence of these lone pairs of electrons. The valence shell electron pair repulsion hypothesis can be used to explain this (VSEPR).
The electron pairs that surround the core atoms of the molecule are utilised to forecast the shape of the molecule using VSEPR Theory. According to VSEPR theory, atoms will constantly try to organise themselves in such a way that the repulsion between electron pairs is minimised. The geometry of the resultant molecule is determined by the atom arrangement.