Question

The total no of hybrid orbitals present in given plane for a molecule of benzene is?

Answer 1

This is the most accurate concept of the structure of benzene. The structure of benzene molecule is best described in terms of molecular orbital treatment theory.
According to this theory, all the C-atoms in benzene are sp2-hybridized. Two sp2-hybrid orbitals of each C-atom overlap with two sp2-hybrid orbital of two other C-atoms to form sigma bonds. In this way there are six sigma bonds are formed between six C-atoms which are 120o apart. Remaining six sp2-orbital of six C-atoms overlap with 1s orbital of six H-atoms individually to form six sigma bonds. Since sigma bond results from the overlap of above said planar orbital, all H and C atoms are in the same plane and their generate a hexagonal ring of C-atoms.