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In PO43- ION, THE FORMAL CHARGE ON EACH OXYGEN ATOM AND P-O BOND ORDER RESP. ARE

A. -0.75,0.6

B. -0.75,1.0

C.-0.75,1.25

D.-3,1.25





(i) Formal charge = No of valence electron of the free atom - non bonding electron -12 × bonding electronFor oxygen 1 : FC =6 - 4 - 12 × 4        =0For other oxygen 2,3,4 (same environment)FC =6 - 6 - 12 × 2        =-1So total formal charge of all oxygen atom = 0 + 3 ×-1 = -3Formal charge on each atom=Total formal charge Total number of Oxygen atoms                                                    =-34 =-0.75(ii) Bond order =2 × no of oxygen atom - chargeno of oxygen atom   = 2 × 4 -34 = 54 =1.25

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