CHM103

Category: CHM103

ATTENTION:

Kindly note that you will be presented with 50 questions randomized from the NOUN question bank. Make sure to take the quiz multiple times so you can get familiar with the questions and answers, as new questions are randomized in each attempt.

Good luck!

CHM103

1 / 50

The individual pressure of a gas in a mixture of gases is called ______

2 / 50

2. Which measurement describes the pressure of a gas?

A. 1.2 g/L

B. 725 mm Hg

C. 2.5 L

D. 315 K

3 / 50

3. Which of the following statements is false?

A. The properties of N2(g) will deviate more from ideality at -100oC than at 100oC.

B. Molecules of CH4(g) at high pressures and low temperatures have no attractive forces between each other.

C. Molecules of an ideal gas are assumed to have no significant volume.

D. Van der Waal's equation corrects for the nonideality of real gases.

4 / 50

________ is an instrument that can be used to measure the strength of an acid or a base

5 / 50

International system of unit or system international can be written as an acronym _______________

6 / 50

The gas law that consider the total pressure of a gas as a function of the pressures exerted by the individual gases that make up the mixture is __________

7 / 50

 A plot showing the variation of volume with temperature at constant pressure is called __________

8 / 50

 The gas law that explain the effusion of gas is ____________

9 / 50

At constant pressure, properties of gases that undergo changes are _______

10 / 50

10. The vapor pressure of pure ethanol at 60 °C is 0.459 atm. Raoult's Law predicts that a solution prepared by dissolving 10.0 mmol naphthalene (nonvolatile) in 90.0 mmol ethanol will have a vapour pressure of __________ atm.

A. 0.413

B. 0.0918

C. 0.79

D. 0.498

11 / 50

11.

Constituents in a solution can be separated by applying the principle of ___________

12 / 50

12. Which one of the following statements most accurately relates the properties of a liquid at room temperature with its intermolecular forces?

A. A liquid with strong intermolecular forces will probably have a low surface tension and a high boiling point.

B. A liquid with strong intermolecular forces will probably have a low surface tension and a high boiling point.

C. A liquid with strong intermolecular forces will probably have high boiling point.

D. A liquid with strong intermolecular forces will probably have a high surface tension and a high boiling point.

13 / 50

13. A mixture of iron filings and copper filings could best be separated by _________

A. distillation

B. sieving

C. magnetic separation

D. adding water, then filtering

14 / 50

14. Which of these alkanes is expected to have the highest viscosity?

A. Nonane

B. Decane

C. Heptane

D. Octane

15 / 50

15.

Physical Chemistry is concern with two major aspects, namely ability to change and _____

16 / 50

16.

-______is a state of matter that does not have a definite shape nor volume

17 / 50

17. Which of the followings will not diffract X-rays?

A. Gas

B. Solid

C. Crystal

D. Liquid

18 / 50

18. An atom on the face-centre of a unit cell is shared by _________ unit cells.

A. Ten

B. Two

C. One

D. Three

19 / 50

19.

The process of separating a pure substance from a solution is called _______

20 / 50

20.

The mathematical equation for Charles law can be written as ________

21 / 50

21.

Meter, kelvin, second and kilogram are  examples of _______

22 / 50

22.

The volume occupied by 1 mole of oxygen gas at s.t.p. is ________ dm3

23 / 50

23.

 A homogenous materials that contain only one substance is called a ___________

24 / 50

24. A liquid will "wet" a surface if: ______

A. the liquid has a low vapor pressure

B. the forces between the liquid molecules are weak

C. the liquid has a lesser density than the surface

D. the forces between the molecules and the surface are greater than the forces between the molecules of the liquid

25 / 50

25.

At high temperature and low pressure, gases tend to undergo phenomena that is called  ___________

26 / 50

26. Which of the followings is not a characteristic of an ideal solution?

A. There is no volume change on mixing

B. There is no enthalpy change on mixing

C. It must obey Raoult’s law

D. It must be colourless

27 / 50

27.

The Beckman thermometer IS used in the Beckman's apparatus for determining __________ of a substance

28 / 50

28. An ideal gas differs from a real gas in that the molecules of an ideal gas __________.

A. have an average molecular mass

B. have no kinetic energy

C. have a molecular weight of zero

D. have no attraction for one another

29 / 50

29.

The temperature, above which a substances can exist only in gaseous state is called _________

30 / 50

30.

Gas molecules confined to a container are in a state of ____________ motion

31 / 50

31.

A skillful process of identifying. substituting and using correct apparatus appropriately in the laboratory is called _____

32 / 50

32.

At low temperature and high pressure, gases  tend to __________

33 / 50

33.

Apparatus that arc basically used for determining the melting points of substances are called ____________

34 / 50

34.

At relatively low pressure, there are no ___________ forces between gas molecules

35 / 50

35.

Temperature, length, time and mass are examples of ________

36 / 50

36.

A solution is prepared by dissolving calcium chloride in water and diluting to 500.0 mL. If this solution contains 44 ppm chloride ions, the concentration of
calcium ions is __________ ppm.

A. 88

B. 11

C. 44

D. 22

37 / 50

37.

The equation of ideal gas can be expressed as ______

38 / 50

38. A sample of oxygen occupies 47.2 liters under a pressure of 1240 torr at 25 $^{o}C$. What volume would it occupy at 25$^{o}C$ if the pressure were decreased to 730 torr?

A. 27.8 L

B. 47.8 L

C. 29.3 L

D. 32.3 L

39 / 50

39.

_________ of a gas is proportional to the mean kinetic energy of the molecules in a gas

40 / 50

40. According to the kinetic theory of gases, a gas can be compressed much more than a liquid or solid because _________

A. gas particles do not attract or repel one another.

B. the particles of a gas are very far apart.

C. a gas is composed of very small particles.

D. gas particles move rapidly.

41 / 50

41.

An expression for the combined gas law can be expressed as ________

42 / 50

42. Ethanol dissolved in water would be an example of ___________

A. a suspension between two liquids

B. ethanol and water do not form a solution

C. a solution between a solid and liquid

D. a solution between two miscible liquids

43 / 50

43.

The mathematical equation for Boyle's law can be written as ___________

44 / 50

44.

 At constant temperature, the gas law that is most suitable is called _____ law

45 / 50

45. Distillation can be used to separate ________

A. a soluble solid from a solution

B. a solid from a solid

C. an insoluble solid from a solution

D. a liquid from a solution

46 / 50

46. What is the average speed (actually the root-mean square speed) of a neon atom at 27 C?

A. 3.34 m/s

B. 183 m/s

C. 19.3 m/s

D. 610 m/s

47 / 50

47.

The rate at which gases diffuse is inversely proportional to the Square root of their ____________

48 / 50

48.

For 1 mole of an ideal gas, a plot of PV against T will give a straight line whose slope is equal to __________

49 / 50

49. Which of the following is not a colligative property?

A. Increase in latent heat

B. Boiling point elevation

C. Vapour pressure lowering

D. Freezing point depression

50 / 50

50.

Numerical value of the universal gas constant is ____ J/K/mol

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