Question

Some statements about valence bond theory

I. Covalent bond is formed by the overlapping of atomic orbitals with unpaired electrons

of opposite spin

II. The strength of covalent bond depends upon the extent of overlapping

III. The paramagnetic nature of oxygen molecule is explained by valance bond theory.

IV. Valence bond theory was proposed by Heitler and London.

The correct answer is

1) I and II 2) I, II and IV 3) I, IIII and IV 4) I, II, III and IV

Answer 1

Explanation:

[i],[ii],[iii] is the answer