If all of the bonding electrons in a molecule are bonded in two-hybrid sp orbitals are likely to have a linear shape.
One of a set of hybrid orbitals is produced when one s orbital and one p orbital is combined mathematically to form two new equivalent, perpendicular orbitals.
A linear molecule is one in which the atoms are arranged in a straight line (less than a 180° angle). The sp hybridization occurs at the central atom of molecules with linear electron-pair geometries.
Carbon dioxide (O=C=O) and beryllium hydride [tex]BeH_2[/tex] are examples of linear electron pairs and molecular geometry.
Hence, option A is correct.
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