Question

in methane molecule all four hydrogen bonds are identical and bond angle HC^H is109°28'​

Answer 1

Answer:

excited state, carbon atom has three unpaired electrons in p-orbitals and one electron in s-orbital.These four valence electrons are with different energies. These orbitals combine to form four identical orbitals. Four hydrogen atoms form four identical C - H bonds with bond angle 109°28’. This is called hybridisation.