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Practicech2ans - Organic Chemistry 7e(Wade Chapter 2...

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1 Organic Chemistry, 7e (Wade) Chapter 2 Structure and Properties of Organic Molecules 1) An orbital can be described by its __________, which is the mathematical description of the shape of the electron wave as it oscillates. Answer: wave function Diff: 1 Section: 2.1 2) The electron density at any point is proportional to the __________ of the electron wave at that point. Answer: square of the wave function Diff: 2 Section: 2.1 3) Which atomic orbital combination would result in a molecular sigma bond? A) B) C) D) Answer: B Diff: 1 Section: 2.2 4) Two p orbitals can overlap to form a s molecular orbital. How many nodes are present in this s molecular orbital? 5) Two p orbitals can overlap to form a σ * molecular orbital. How many nodes are present in this σ * molecular orbital?
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2 6) Consider the interaction of two hydrogen 1s atomic orbitals of the same phase. Which of the statements below is an incorrect description of this interaction? 7) When orbitals on different atoms interact, __________ are produced. Answer: molecular orbitals Diff: 1 Section: 2.2 8) What kind of molecular orbital ( σ , σ * , π , or π * ) results when the two atomic orbitals shown below interact in the manner indicated? Answer: σ * Diff: 2 Section: 2.2 9) What kind of molecular orbital ( σ , σ * , π , or π * ) results when the two atomic orbitals shown below interact in the manner indicated? Answer: σ Diff: 2 Section: 2.2 10) What kind of molecular orbital ( σ , σ * , π , or π * ) results when the two atomic orbitals shown below interact in the manner indicated? Answer: σ * Diff: 2 Section: 2.2
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3 11) Which of the following statements about π molecular orbitals is/are correct? A) π molecular orbitals are cylindrically symmetric. B) Most of the electron density in a π molecular orbital is centered above and below the internuclear axis. C) When two atoms are connected by a double bond, both of these bonds are π bonds. D) Both statements B and C are correct. E) Statements A, B, and C are all correct. Answer: B Diff: 3 Section: 2.3 12) A __________ bond results when parallel p orbitals overlap sideways. Answer: π Diff: 1 Section: 2.3 13) What kind on molecular orbital ( σ , σ * , π , or π * ) results when the two atomic orbitals shown below interact in the manner indicated? Answer: π Diff: 2 Section: 2.3 14) What kind of molecular orbital ( σ , σ * , π , or π * ) results when the two atomic orbitals shown below interact in the manner indicated? Answer: π * Diff: 2 Section: 2.3
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