TA practice quiz 3 - 1. bent; trigonal pyramidal; t-shaped...

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

View Full Document Right Arrow Icon
CH301 Fall 2010 Practice Quiz 3 1.How many polar ionic, polar covalent and non-polar covalent bonds are present in the Lewis structure for BF 2 BNH 2 ? Base your answer on simple EN considerations. (Hint: the molecule is drawn much as it is written.) 1. 0; 6; 0 2. 0; 3; 3 3. 2; 3; 1 4. 2; 4; 0 5. 0; 5; 1 2. In the Lewis structure for dimethylamine (CH 3 NHCH 3 ), what are the approximate bond angles, hybridization and electronic geometry of the nitrogen atom? (Hint: the molecule is drawn much as it is written.) 1. 90°, sp 3 , tetrahedral 2. 109.5°, sp 2 , trigonal planar 3. 120°, sp 2 , trigonal planar 4. 180°, sp , linear 5. 109.5°, sp 3 , tetrahedral 3. Of the following choices, which has a molecule paired incorrectly with either its bond angle(s), electronic geometry, or hybridization? 1. CO 2 , 180° 2. SiH 4 , tetrahedral 3. NH 4 + , 109.5° 4. SCl 6 , sp 3 d 2 5. XeF 2 , linear 6. BF 3 , sp 2 4. What are the molecular geometries of the labeled atoms (in order: a, b, c) in the Lewis structure below? Note: only bonding electrons are shown.
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1. bent; trigonal pyramidal; t-shaped 2. bent; tetrahedral; t-shaped 3. trigonal planar; bent; tetrahedral 4. trigonal pyramidal; linear; see-saw 5. trigonal planar; linear; trigonal bipyramidal 5. Which of the following molecules is/are polar? 1. I only 2. III only 3. II, III 4. II only 5. I, III 6. I, II, III 7. I, II 6. The Lewis structure for benzene (C 6 H 6 ) has how many and how many bonds? 1. 9; 6 2. 6; 3 3. 12; 3 4. 12; 0 5. 15; 0 7. Which of the following statements concerning hybrid orbitals is/are true? I) Hybrid orbitals are energetically degenerate. II) Any element can form sp 3 d 2 hybrid orbitals. III) Hybridizing a 2s and a 2p orbital would produce a single sp hybrid orbital. 1. I only 2. I, III 3. II, III 4. II only 5. I, II 6. I, II, III 7. III only 8. What orbitals were used to form the bond in the thionoester molecule below? 1. sp 2 , 3s 2. 2p , 3p 3. sp 3 , 3s 4. 2s , 3p 5. sp 3 , 3p...
View Full Document

Page1 / 3

TA practice quiz 3 - 1. bent; trigonal pyramidal; t-shaped...

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