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Among the following orders, which is incorrect with respect to physical properties of group 15 elements?

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First ionisation enthalpy: N > P > As > Sb > Bi

Electro negativity: N > P > As > Sb = Bi

Covalent radius: N < P < As < Sb < Bi

Density: N > P > As > Sb > Bi

answer is D.

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Detailed Solution

Densities increase down the group (N to Bi)

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