. Which one of the following substances exhibits dipole-dipole attraction betwee

Question

. Which one of the following substances exhibits dipole-dipole attraction between molecules?
A) CH4
B) AsF3
C) CO2
D) BCl3

2. The predominant intermolecular force in CH3CH2CH3 (propane, a hydrocarbon) is:
A) Dipole-Dipole
B) Ion-dipole
C) Hydrogen-bonding
D) London Dispersion forces

3. Hydrogen bonding is important in the case of: (choose one answer)
A) CH3OH
B) CH4
C) CF4
D) CHF3

4. The vapor pressure of any substance at its normal boiling point is:
A) 1 KPa
B) equal to atmospheric pressure
C) 1 torr
D) 1 atm

5. A substance that has a low boiling will have:
A) strong intermolecular forces of attraction
B) high volatility
C) low volatility
D) No volatility at all

6. The type of solid that is characterized by low melting point, softness, and low electrical conduction is a(n)________ solid.
A) Metallic
B) Ionic
C) Molecular
D) covalent-network

7. The solubility of a gas is more when the temp and pressure are (choose one answer):
A) 20 deg C and 1 atm
B) 10 deg C and 400 mm Hg
C) 20 deg C and 0.5 atm
D) 10 deg C and 1 atm

8. Which of the following substances is more likely to dissolve in liquid CS2?
A) Potassium iodide
B) Iodine
C) Lithium iodide
D) Sodium iodide

9. The mass percent of urea (Formula CH4N2O) in a solution prepared by dissolving 16 g of urea ini 39 g water is:
A) 29%
B) 16%
C) 71%
D) 0.29

10. The molality of a benzene solution prepared by mixing 12.0 g benzene (C6H6) with 38.0 g CCl4 is:
A) 0.622
B) 0.240 m
C) 0.508 m
D) 4.04 m

Explanation / Answer

Here are the answers: 1. b 2. d 3. a. 4. d 5. b 6. c 7.d 8.b 9.a; I did not have #10 on my quiz.

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