1.

Phosphorous can form PCl_(5) molecule in the excited state of phosphorous atom. But the formation of PH_(5) is not possible in the same state. Account for this.

Answer»

SOLUTION :(i) VALENCE electronic CONFIGURATION of hydrogen and chlorine
(ii) type of hybridisation in `PCl_(5)`
(iii) comparison of electronegativities between hydrogen and chlorine
(iv)the difference between the ENERGIES of OVERLAPPING orbitals


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