When an atom in a molecule or ion is described as sp hybridized, its molecular geometry around that atom is a octahedral b. trigonal planar c. linear . d. trigonal bipyramidal. tetrahedral.

 linear .

Explanation:

As we are given that a molecule or ion is described as sp hybridized,

Linear is a molecular shape that results when there are 2 bonding   pairs present on the central atom in the molecule.

a) Octahedral : The number of electron pairs are 6 that means the hybridization will be

b) trigonal planar : The number of electron pairs are 3 that means the hybridization will be

c) linear : The number of electron pairs are 2 that means the hybridization will be

d)  trigonal bipyramidal: The number of electron pairs are 5 that means the hybridization will be

e) tetrahedral: The number of electron pairs are 4 that means the hybridization will be