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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? A) 0 B) 1 C) 2 D) 3 Answer: C Diff: 1 Section: 2.2 5) Two p orbitals can overlap to form a σ * molecular orbital. How many nodes are present in this σ * molecular orbital? A) 0 B) 1 C) 2 D) 3 Answer: D Diff: 1 Section: 2.2
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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? A) A sigma bonding molecular orbital is formed. B) The molecular orbital formed is lower in energy than a hydrogen 1s atomic orbital. C) The molecular orbital formed has a node between the atoms. D) The molecular orbital formed is cylindrically symmetric. E) A maximum of two electrons may occupy the molecular orbital formed. Answer: C Diff: 3 Section: 2.2 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:
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This note was uploaded on 10/12/2010 for the course CHEM 7e taught by Professor Boikes during the Fall '10 term at Rutgers.

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

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