CHM115 Review questions Nov 09

CHM115 Review questions Nov 09 - CHM11500 Fa09 1. Review...

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CHM11500 Fa09 Review Multiple Choice Questions Nov. 2009 1. Which of the following molecules has a permanent dipole? Cl F F Cl Cl F Cl F I. II. III. IV. F F F F (a) III (b) II only (c) I and II (d) I and IV (e) I, II, and IV 2. In a solution of chloroform (CHCl 3 ) in ethanol (CH 3 -CH 2 -OH) which of the intermolecular interactions are expected to occur between the solute and the solvent? (a) Ion-dipole and dipole-dipole (b) Ion-dipole, hydrogen bonding, and London dispersion (induced dipole) (c) London dispersion (induced dipole) and covalent bonding (d) Dipole-dipole and London dispersion (induced dipole) (e) Ion-dipole and London dispersion (induced dipole) 3. Soaps and detergents are made up of long chain hydrocarbons with an ionic end. When they dissolve grease, they form a spherical structure as shown below. Which of the following statement(s) about the spherical structure is correct? (a) It has a hydrophilic interior and hydrophobic exterior. (b) It has a hydrophobic interior and hydrophilic exterior. (c) It interacts with the solvent (water) via polymerization. (d) Both a and c are correct. (e) a, b, and c are correct.
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4. Dissolving acetone in water is an exothermic process. Which of the following statements about the strengths of the intermolecular forces between the solute and the solvent is correct? (a) They are greater in solution than in the pure solvent and the pure solute. (b) They are less in solution than in the pure solvent and the pure solute. (c) They are greater in pure solute than in the pure solvent and solution. (d) They are greater in the pure solvent than in the pure solute and solution. (e) The strengths of the intermolecular forces are the same in the solvent, solute, and solution. 5. A solution is 36% by weight HCl and has a density of 1.18 g/cm 3 . What is the molality of the solution? (a) about 1.00 m. (b) between 10.0 m and 12.0 m. (c) between 14.0 m and 16.0 m. (d) between 18.0 m and 20.0 m. (e) greater than 20.0 m. 6. A solution was made with equal volumes of three alcohols: methanol, ethanol, and iso-propanol.
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CHM115 Review questions Nov 09 - CHM11500 Fa09 1. Review...

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