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Unformatted text preview: shin (ys5232) – H08: MO Theory – mccord – (50970) 1 This print-out should have 19 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A sigma bond 1. stems from sp hybridization of orbitals. 2. always exists in conjunction with a pi bond. 3. is always polar. 4. is composed of non-bonding orbitals. 5. may exist alone or in conjunction with a pi bond. 002 10.0 points In a new compound, it is found that the cen- tral carbon atom is sp 2 hybridized. This implies that 1. carbon has four lone pairs of electrons. 2. carbon has four regions of high electron density. 3. carbon has a tetrahedral electronic geom- etry. 4. carbon has four sigma bonds. 5. carbon is also involved in a pi bond. 003 10.0 points In the molecule, C 2 H 4 , what are the atomic orbitals that participate in forming the sigma bond between the C and H atoms? 1. H: sp 2 and C: sp 2 2. H: 2 p and C: sp 3 3. H: 1 s and C: 2 p 4. H: 1 s and C: sp 5. H: 1 s and C: sp 2 004 (part 1 of 4) 10.0 points Draw the Lewis structure for the following hydrocarbon molecule. The carbons are num- bered one to four starting with the far left...
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- Fall '07
- Chemical bond, Shin, sigma bonds