1 K 2 S 2 C 8 H 18 3 CH 4 4 H 2 O 3 7 Which one of the following substances

1 k 2 s 2 c 8 h 18 3 ch 4 4 h 2 o 3 7 which one of

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(1) K 2 S (2) C 8 H 18 (3) CH 4 (4) H 2 O ( 3 )7. Which one of the following substances should exhibit hydrogen bonding in the liquid state? (1) CH 3 F (2) CH 3 OCH 3 (3) CH 3 NH 2 (4) H 2 S ( 4 )8. Arrange the following in order of increasing boiling point: RbCl, CH 3 Cl, CH 3 OH, CH 4 . (1) CH 3 OH < CH 3 Cl < RbCl < CH 4 (2) CH 3 OH < CH 4 < CH 3 Cl < RbCl (3) CH 4 < CH 3 OH < CH 3 Cl < RbCl (4) CH 4 < CH 3 Cl < CH 3 OH < RbCl ( 1 )9. The substance expected to have the lowest viscosity is . (1) CH 4 (2) H 3 CCH 3 (3) HCl (4) CH 3 CH 2 OH ( 3 )10. Which of the following liquids would have the highest viscosity at 25 C? (1) CH 3 OCH 3 (2) CH 2 Cl 2 (3) C 2 H 5 OH (4) CH 3 Br ( 3 )11. The substance with the largest heat of vaporization is __________. (1) Cl 2 (2) Br 2 (3) I 2 (4) O 2 ( 4 )12. The factors that affect the size of dispersion forces include .
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(1) the polarizability of the molecule (2) the size of the molecule (3) the ease with which the electron cloud is distorted to from a temporary dipole (4) all of the above (_2 )13. Which one of the following should have the highest vapor pressure? (1) H 2 O (2) CH 4 (3) NaCl (4) CH 3 Br (_4 )14. The correct order of boiling points is _____. (1) O 2 > Cl 2 (2) Ne> Xe (3) H 2 S >H 2 O (4) CS 2 > CO 2 (_2 )15. Which of the following liquids would have the highest viscosity at 25°C? (1) CBr 4 (2) HOCH 2 CH 2 OH (3) CH 3 CH 2 OH (4) CH 2 Cl 2 (_4 )16. Which of the following would be expected to have the highest vapor pressure at room temperature? (T b is the normal boiling point) (1) CH 3 OH, T b =65 o C (2) H 2 O, T b =100 o C (3) C 2 H 5 OH, T b =78 o C (4) CH 3 OCH 3 , T b =56 o C ( 3 )17. Which one of the following substances will have both dispersion forces and dipole-dipole forces? (1) BF 3 (2) Br 2 (3) HCl (4) CO 2 ( 1 )18. Which of the following characteristics indicates the presence of weak intermolecular forces in a liquid? (1) a low heat of vaporization (2) a low vapor pressure (3) a high boiling point (4) none of the above
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( 1 )19. Which of the following is expected to have the lowest vapor pressure at room temperature? (1) C 2 H 5 OH (2) CH 3 OH (3) CH 3 OCH 3 (4) Cl 2 ( 4 )20. The force that makes the area of the surface of a liquid as small as possible is . (1) diffusion (2) viscosity (3) condensation (4) surface tension ( 2 )21. Which of the following factors increases the viscosity? (1) increase of temperature (2) stronger intermolecular forces (3) less molecular attraction (4) lower molecular weight ( 1 )22. When comparing the properties of two substances, the one with higher heat of vaporization is likely to have .
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