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Q.

Bond length of A-A bond is 124 pm and bond length of B-B bond i8174 pm. Calculate the bond length (in pm of A−B  bond in AB molecule if percent ionic character of A-B bond is 19.5%.

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answer is 140.

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Detailed Solution

19.5=16(ΔEN)+3.5(ΔEN)2

ΔEN=1rA=1242=62,rB=1742=87

dA−B=rA+rB−9(ΔEN) (values in pm) dA−B=62+87−9=140

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