Question

relation between electronegativity and hybridisation...?
plz don't give answer if you don't know..... ........

Answer 1

We should know that S orbitals hold electrons more tightly to nucleus than P orbitals . This implies that S orbitals are effectively more electronegative . Now, in sp2 carbon the character of each orbital has 33% of s orbital characteristics whereas in each sp3 orbital s character is 25% . So sp2 has more s character and therfore more electronegativity.
So carbons are more electronegative. The larger the s character of the atom the closer the electrons are held to the nucleus. Sp3 carbons are the least electronegative as the p character forces the electrons to exists further from the nucleus, decrease the electronegativity..