Question

CE112-03 Name: January 27, 2016 Spring 2016 Quiz 1 Due Date: January 29, 2016 1. Which pair of the following materials has London dispersion forces as the only intermolecular forces? A. Kr, CH4. B. H20, HCI C. NH3. C6H 13NH2 D. AlF3, H3COCH3 E. CH3CI, NaBr 2. When NaCl dissolves in water, aqueous Nat and Cl- ions result, The force of attraction that exists between Nat ions and H20 molecules is called A. dipole-dipole B. ion-ion C. hydrogen bonding D. on-dipole E. London dispersion force 3. Which statements about viscosity are true? (i) Viscosity increases as temperature decreases. increases as molecular weight increases. (iii) Viscosity increases as intermolecular forces increase. A. (i only B. (i) and (iii) C. (i) and (iii) D. none E. all 4. Large intermolecular forces in a substance are manifested by A, low vapor pressure B. high boiling point C. high heats of fusion and vaporization D. high critical temperatures and pressures E. all of the above

Please help me with questions 1-7? Thanks! :)

Answer 1

1)

London dipsersions are only avaiable in nonpolar non polar interactions:

choose

AlF3 and CH3OCH3

since those are nonpolar

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