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Unformatted text preview: Version 001 Quiz 6 sparks (50990) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. IMForces 001 1.0 points What would be the most significant type of intermolecular forces in a liquid sample of fluoroform (CHF 3 )? 1. dipole-dipole correct 2. covalent 3. hydrogen bonding 4. dispersion 5. ionic Explanation: London forces, dispersion forces, van der Waals or induced dipoles all describe the same intermolecular force. London forces are in- duced, short-lived, and very weak. Molecules and atoms can experience London forces be- cause they have electron clouds. London forces result from the distortion of the elec- tron cloud of an atom or molecule by the presence of nearby atoms or molecules. Permanent dipole-dipole interactions are stronger than London forces and occur be- tween polar covalent molecules due to charge separation. H-bonds are a special case of very strong dipole-dipole interactions. They only occur when H is bonded to small, highly electroneg- ative atoms F, O or N only....
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This note was uploaded on 11/05/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Fall '07 term at University of Texas at Austin.
- Fall '07