The comcept of redistribution of energy in different orbitals of an atom associated with different energies to give new orbitals of equal(or somethimes it may be non-equal) energy oriented in space in definite directions is called hybridization and formed new orbitals are called hybrid orbitals. The bonds formed by such orbitals are called hybrid bonds. The process of mixing of orbitals itself requiressome energy. Thus, some additional energy, is needed for the hybridisation (mixing) of atomic orbitals. Q. Select from each set the molecule or ion having the smallest bond angle : (i) H_(2)Se, H_(2)Te and PH_(3) (ii) NO_(2)^(-) and NH_(2)^(-) (iii) POF_(3) and POCl_(3) (X-P-X angle) (iv) OSF_(2)Cl_(2) and SF_(2)(CH_(3))_(2) (F-S-F angle)

The comcept of redistribution of energy in different orbitals of an at

1.	The comcept of redistribution of energy in different orbitals of an atom associated with different energies to give new orbitals of equal(or somethimes it may be non-equal) energy oriented in space in definite directions is called hybridization and formed new orbitals are called hybrid orbitals. The bonds formed by such orbitals are called hybrid bonds. The process of mixing of orbitals itself requiressome energy. Thus, some additional energy, is needed for the hybridisation (mixing) of atomic orbitals. Q. Select from each set the molecule or ion having the smallest bond angle : (i) H_(2)Se, H_(2)Te and PH_(3) (ii) NO_(2)^(-) and NH_(2)^(-) (iii) POF_(3) and POCl_(3) (X-P-X angle) (iv) OSF_(2)Cl_(2) and SF_(2)(CH_(3))_(2) (F-S-F angle)
Answer» `H_(2)Se, NH_(2)^(-) POF_(3) and OSF_(2)Cl_(2)` `H_(2)Te, NO_(2)^(-), POF_(3)and SF_(2)(CH_(3))_(2)` `PH_(3) ,NH_(2)^(-), POCl_(3) and SF_(2)(CH_(3))_(2)` `H_(2)Te,NH_(2)^(-), POF_(3) and SF_(2)(CH_(3))_(2)` Solution :Order of bond angle: `(I)PH_(3)gtH_(2)SegtH_(2)Te``(II)NO_(2)^(-)gtNH_(2)^(-)``(III)POCl_(3)gtPOF_(3)(X-P-X`angle)`(iv)OSF_(2)Cl_(2)gtSF_(2)(CH_(3))_(2)(angleF-S-F)`