CH121_Exam_III_Fall_2007 - Examination III Chemistry 121,...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Examination III Chemistry 121, Waddell, Fall 2007 Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The basis of the VSEPR model of molecular bonding is __________. A) hybrid orbitals will form as necessary to, as closely as possible, achieve spherical symmetry B) atomic orbitals of the bonding atoms must overlap for a bond to form C) regions of electron density on an atom will organize themselves so as to maximize s - character D) electron domains in the valence shell of an atom will arrange themselves so as to minimize repulsions E) regions of electron density in the valence shell of an atom will arrange themselves so as to maximize overlap 1) 2) An electron domain consists of __________. a) a nonbonding pair of electrons b) a single bond c) a multiple bond A) a only B) b only C) c only D) a, b, and cE ) b and c 2) 3) According to VSEPR theory, if there are two electron domains on a central atom, they will be arranged such that the angles between the domains are __________. A) 180° B) 90° C) 120° D) 109.5° E) 360° 3) 4) Of the molecules below, only __________ is nonpolar. A) TeCl 2 B) CO 2 C) HCl D) H 2 OE ) N H 3 4) 5) According to valence bond theory, which orbitals overlap in the formation of the bond in HBr? A) 2s on H and 3p on Br B) 1s on H and 4p on Br C) 1s on H and 3p on Br D) 1s on H and 4s on Br E) 2s on H and 4p on Br 5) 6) The blending of one s atomic orbital and two p atomic orbitals produces __________. A) three sp 2 hybrid orbitals B) two sp 3 hybrid orbitals C) two sp 2 hybrid orbitals D) three sp 3 hybrid orbitals E) three sp hybrid orbitals 6) 7) The hybridization of nitrogen in the H C N: molecule is __________. A) sp 2 B) sp C) s 2 pD ) s 3 pE ) s p 3 7) 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
8) Electrons in __________ bonds remain localized between two atoms. Electrons in __________ bonds can become delocalized between more than two atoms. A) ionic, sigma B) sigma, pi C) pi, sigma D) sigma, sigma E) pi, pi 8) 9) Based on molecular orbital theory, the bond order of the N N bond in the N 2 molecule is __________.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/22/2008 for the course CH 121 taught by Professor Waddell during the Fall '08 term at University of Alabama in Huntsville.

Page1 / 10

CH121_Exam_III_Fall_2007 - Examination III Chemistry 121,...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online