EXAM AGAIN - AP Chemistry: Chemical Bonding and Molecular...

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AP Chemistry: Chemical Bonding and Molecular Geometry MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) 1) The electron configuration of the S 2 - ion is __________. A) [Ne]3s 2 3p 6 B) [Ar]3s 2 3p 2 C) [Kr]3s 2 2p - 6 D) [Ne]3s 2 3p 2 E) [Ar]3s 2 3p 6 2) 2) Bond enthalpy is __________. A) sometimes positive, sometimes negative B) always zero C) always negative D) always positive E) unpredictable 3) 3) The Cl - Si - Cl bond angle in the SiCl 2 F 2 molecule is approximately __________. A) 109.5° B) 90° C) 120° D) 180° E) 60° 4) 4) Of the following species, __________ will have bond angles of 120°. A) PH 3 B) NCl 3 C) ClF 3 D) BCl 3 E) All of these will have bond angles of 120°. 5) 5) The blending of one s atomic orbital and two p atomic orbitals produces __________. A) three sp 3 hybrid orbitals B) three sp hybrid orbitals C) two sp 3 hybrid orbitals D) three sp 2 hybrid orbitals E) two sp 2 hybrid orbitals 1
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6) 6) The molecular geometry of the left - most carbon atom in the molecule below is __________. A) T - shaped B) octahedral C) trigonal bipyramidal D) tetrahedral E) trigonal planar Consider the following species when answering the following questions: (i) PCl 3 (ii) CCl 4 (iii) TeCl 4 (iv) XeF 4 (v) SF 6 7) 7) In which of the molecules does the central atom utilize d orbitals to form hybrid orbitals? A) (i) and (ii) B) (iii) only C) (i) and (v) D) (iii), (iv), and (v) E) (v) only 8) 8) A typical triple bond __________. A) consists of six shared electron pairs B) consists of one Η bond and two Δ bonds C) consists of three shared electrons D) consists of two Η bonds and one Δ bond E) is longer than a single bond 9) 9) According to VSEPR theory, if there are three electron domains in the valence shell of an atom, they will be arranged in a(n) __________ geometry. A) linear B) trigonal bipyramidal C) tetrahedral D) trigonal planar E) octahedral 2
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10) 10) Of the following, only __________ appears to gain mass in a magnetic field. A) C 2 B) N 2 C) Li 2 D) F 2 E) O 2 11) 11) The molecular geometry of the CHF 3 molecule is __________, and the molecule is __________. A) trigonal pyramidal, polar
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This note was uploaded on 12/20/2010 for the course CHEMISTRY 161 taught by Professor Seigel during the Spring '10 term at Rutgers.

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EXAM AGAIN - AP Chemistry: Chemical Bonding and Molecular...

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