General Chemistry 1 Practice Questions (Set 11)

General Chemistry 1 Practice Questions (Set 11)
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1) Explain why ice floats in water.
A) Ice is more dense than water.
B) Steam is less dense than water.
C) Ice is less dense than water.
D) Steam is more dense than water.
E) Ice is the same density as water.

2) Identify the state of matter that is the most compressible.
A) gas
B) solid
C) liquid
D) All are compressible.
E) None is compressible.

3) Identify the characteristics of a liquid.
A) indefinite shape and volume
B) indefinite shape, but definite volume
C) definite shape and volume
D) none of the above
E) all of the above

4) Identify the characteristics of a gas.
A) indefinite shape and volume
B) indefinite shape, but definite volume
C) definite shape and volume
D) none of the above
E) all of the above

5) Which one of the following has a definite shape and volume?
A) gas
B) liquid
C) solid
D) none of the above
E) all of the above

6) Which one of the following has a low density?
A) gas
B) liquid
C) solid
D) none of the above
E) all of the above

7) Give the change in condition to go from a liquid to a gas.
A) increase heat or reduce pressure
B) increase heat or increase pressure
C) cool or reduce pressure
D) cool or increase pressure
E) none of the above

8) The forces between polar molecules are known as
A) hydrogen bonding.
B) ion-dipole forces.
C) dipole-dipole forces.
D) dispersion forces.
E) ionic forces.

9) A molecule contains hydrogen bonding if it contains hydrogen covalently bonded to
A) fluorine, oxygen, or nitrogen.
B) chlorine, carbon, or iodine.
C) sulfur, sodium, or fluorine.
D) oxygen, nitrogen or carbon

10) Which of the following statements is TRUE?
A) Intermolecular forces are generally stronger than bonding forces.
B) The potential energy of molecules decreases as they get closer to one another.
C) Energy is given off when the attraction between two molecules is broken.
D) Increasing the pressure on a solid usually causes it to become a liquid.
E) None of the above is true.

11) Place the following compounds in order of decreasing strength of intermolecular forces.

I. CH3CH2CH2CH2CH2CH3 II. (CH3)3CCH3 III. (CH3)3CCH2CH3

A) III > II > I
B) I > III > II
C) I > II > III
D) II > III > I
E) III > I > II

12) Identify the compound with the lowest boiling point.
A) CH3OCH3
B) CH3CH2CH3
C) CH3CHO
D) (CH3)2O
E) CH3CN

13) The two strands in DNA are held together by
A) dispersion forces.
B) dipole-dipole forces.
C) hydrogen bonding.
D) ion-dipole forces.
E) ionic bonding.

14) In a liquid, the energy required to increase the surface of the area by a unit amount is called
A) viscosity.
B) surface tension.
C) dipole-dipole force.
D) hydrogen bonding.
E) capillary action.

15) A paper clip floating on the top of water is an example of
A) capillary action.
B) viscosity.
C) hydrogen bonding.
D) surface tension.
E) dipole-dipole forces.

16) Identify the term used to describe the ability of a liquid to flow against gravity up a narrow tube.
A) capillary action
B) viscosity
C) surface tension
D) density
E) none of the above

17) Capillary action occurs because
A) cohesive forces are greater than adhesive forces.
B) adhesive forces equal adhesive forces.
C) adhesive forces are greater than cohesive forces.
D) surface tension is high.
E) surface tension is low.

18) Define vaporization.
A) A liquid becomes a gas.
B) A gas becomes a liquid.
C) A gas becomes a solid.
D) A solid becomes a gas.
E) A solid becomes a liquid.

19) Define condensation.
A) A liquid becomes a gas.
B) A gas becomes a liquid.
C) A gas becomes a solid.
D) A liquid becomes a solid.
E) A solid becomes a liquid.

20) Describe sweating in humans.
A) It is an endothermic reaction.
B) The sweat evaporates absorbing heat from the body.
C) The skin is cooled.
D) None of the above
E) All of the above

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