Answer:
120°
Step-by-step explanation:
Valence electrons of boron = 2
Valence electrons of chlorine = 7
The total number of the valence electrons = 3 + 3(7) = 24
The Lewis structure is drawn in such a way that the octet of each atom in the molecule is complete. So,
The Lewis structure is:
There is no lone pair involved, so, It is of type AB₃.
According to the theory, the atoms will form a geometry in such a way that there is minimum repulsion and maximum stability.
So, it is of triangular shape, with bond angle , 120 ° .