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      Question

      Which of the following is not a correct

      statement?
      A The canonical structures have no real existence. Correct Answer Incorrect Answer
      B Every AB5 molecule does in fact have square pyramidal shape Correct Answer Incorrect Answer
      C The electron-deficient molecules can act as Lewis acids Correct Answer Incorrect Answer
      D Multiple bonds are always shorter than corresponding single bonds. Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      AB5 molecules may have square pyramidal or trigonal bipyramidal geometry. Rest of the statements are correct.

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