Which of the following has the highest bond energy?

Explain the Valence Bond Theory $(VBT)$.

Among $B_2H_6, B_3N_3H_6, N_2O, N_2O_4, H_2S_2O_3$ and $H_2S_2O_8$,the total number of molecules containing a covalent bond between two atoms of the same kind is . . . .

Bond dissociation energies of $HF, HCl, HBr$ follow the order:

Covalent compounds are soluble in ..............

When two atoms of chlorine combine to form one molecule of chlorine gas,the energy of the molecule is: