2.Which of the following statements is (are)incorrect?
I.The hybridization of boron in BF3 is SP2.
II.The molecule XeF
4 is nonpolar.
III.The bond order of N2 is three.
IV.The molecule HCN has two pi bonds and two sigma bonds.
(A)All four statements are correct .
(B)III is incorrect.
(C)Iand III are incorrect.
(D)II and III are incorrect.
(E)II, III and IV are incorrect.
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