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PMCQ-XIII[4003].docx

PMCQ-XIII[4003].docx - Practice Multiple Choice Questions...

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Practice Multiple Choice Questions Quiz (PMCQ-XIII) Chapter 13 Properties of Solutions 1) The dissolution of water in octane (C 8 H 18 ) is principally prevented by ________. A) London dispersion forces between octane molecules B) hydrogen bonding between water molecules C) dipole-dipole attraction between octane molecules D) ion-dipole attraction between water and octane molecules E) repulsion between like-charged water and octane molecules Answer: B Diff: 2 Var: 1 Page Ref: Sec. 13.1, 13.3 LO: 13.1, 13.2 GO: G2 2) When argon is placed in a container of neon, the argon spontaneously disperses throughout the neon because ________. A) of the large attractive forces between argon and neon atoms B) of hydrogen bonding C) a decrease in energy occurs when the two mix D) the dispersion of argon atoms produces an increase in disorder E) of solvent-solute interactions Answer: D Diff: 2 Var: 1 Page Ref: Sec. 13.1, 13.3 LO: 13.1, 13.2 GO: G2 3) Hydration is a specific example of the phenomenon known generally as ________. A) salutation B) disordering C) solvation D) condensation E) dilution Answer: C Diff: 1 Var: 1 Page Ref: Sec. 13.1, 13.3 LO: 13.1, 13.2 GO: G2
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4) The phrase "like dissolves like" refers to the fact that ________. A) gases can only dissolve other gases B) polar solvents dissolve polar solutes and nonpolar solvents dissolve nonpolar solutes C) solvents can only dissolve solutes of similar molar mass D) condensed phases can only dissolve other condensed phases E) polar solvents dissolve nonpolar solutes and vice versa Answer: B Diff: 1 Var: 1 Page Ref: Sec. 13.1, 13.3 LO: 13.1, 13.2 GO: G2 5) When solutions of strong electrolytes in water are formed, the ions are surrounded by water molecules. These interactions are described as a case of ________. A) hydration B) supersaturation C) crystallization D) dehydration E) saturation Answer: A Diff: 2 Var: 1 Page Ref: Sec. 13.1, 13.3 LO: 13.1, 13.2 GO: G2 6) In a saturated solution of a salt in water, ________. A) the rate of crystallization > the rate of dissolution B) the rate of dissolution > the rate of crystallization C) seed crystal addition may cause massive crystallization D) the rate of crystallization = the rate of dissolution E) addition of more water causes massive crystallization Answer: D Diff: 1 Var: 1 Page Ref: Sec. 13.2 LO: 13.3 GO: G2 7) Compounds composed of a salt and water combined in definite proportions are known as ________. A) clathrates B) homogenates C) ionic solids D) molecular solids E) hydrates Answer: E Diff: 2 Var: 1 Page Ref: Sec. 13.1, 13.3 LO: 13.1, 13.2 GO: G2
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8) An unsaturated solution is one that ________. A) has no double bonds B) contains the maximum concentration of solute possible, and is in equilibrium with undissolved solute C) has a concentration lower than the solubility limit D) contains more dissolved solute than the solubility allows E) contains no solute Answer: C Diff: 1 Var: 1 Page Ref: Sec. 13.2 LO: 13.3 GO: G2 9) A solution with a concentration higher than the solubility allows is ________.
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