MX6 is a molecule with octahedral geometry. How many X – M – X bonds are at 180°? (a) four (b) two (c) three (d) six
Explanation: In octahedral molecule six hybrid orbitals directed towards the corners of a regular octahedron with a bond angle of 90°. According to this geometry, the number of X - M - X bonds at 180° must be three.
