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 gas law that explain the effusion of gas is ____________

2 / 50

At low temperature and high pressure, gases  tend to __________

3 / 50

The mathematical equation for Charles law can be written as ________

4 / 50

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

5 / 50

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

6 / 50

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

7 / 50

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

8 / 50

8. In fractional distillation, a mixture of liquids is separated based on their _______

A. chemical composition

B. boiling points

C. solubility

D. density

9 / 50

9. 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

10 / 50

10. The concentration of KBr in a solution prepared by dissolving 2.21 g of KBr in 897 g of water is __________ molal.

A. 0.0167

B. 0.0207

C. 2.46

D. 0.0186

11 / 50

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

A. ethanol and water do not form a solution

B. a suspension between two liquids

C. a solution between a solid and liquid

D. a solution between two miscible liquids

12 / 50

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

A. have no kinetic energy

B. have an average molecular mass

C. have a molecular weight of zero

D. have no attraction for one another

13 / 50

13.

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

14 / 50

14. Distillation can be used to separate ________

A. an insoluble solid from a solution

B. a solid from a solid

C. a liquid from a solution

D. a soluble solid from a solution

15 / 50

15. 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. 0.498

B. 0.413

C. 0.79

D. 0.0918

16 / 50

16.

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

17 / 50

17.

Modern approach to chemistry deals with equilibrium properties, ability to change and ______

18 / 50

18.

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

19 / 50

19.

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

20 / 50

20.

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. 11

B. 22

C. 44

D. 88

21 / 50

21.

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

22 / 50

22.

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

23 / 50

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

A. Two

B. One

C. Ten

D. Three

24 / 50

24. Which of the following statements is false?

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

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

25 / 50

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

A. distillation

B. adding water, then filtering

C. magnetic separation

D. sieving

26 / 50

26.

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

27 / 50

27.

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

28 / 50

28. The Henry's law constant for helium gas in water at 30 °C is 0.00037 M/atm. When the partial pressure of helium above a sample of water is 0.650 atm, the concentration of helium in the water is __________ M.

A. 1.3

B. 0.00176

C. 0.000569

D. 0.000241

29 / 50

29.

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

30 / 50

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

A. a gas is composed of very small particles.

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

C. gas particles move rapidly.

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

31 / 50

31.

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

32 / 50

32.

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

33 / 50

33. Which measurement describes the pressure of a gas?

A. 315 K

B. 725 mm Hg

C. 1.2 g/L

D. 2.5 L

34 / 50

34.

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

35 / 50

35.

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

36 / 50

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

A. the liquid has a lesser density than the surface

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

C. the liquid has a low vapor pressure

D. the forces between the liquid molecules are weak

37 / 50

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

A. Solid

B. Gas

C. Crystal

D. Liquid

38 / 50

38.

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

39 / 50

39.

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

40 / 50

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

A. It must be colourless

B. It must obey Raoult’s law

C. There is no volume change on mixing

D. There is no enthalpy change on mixing

41 / 50

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

A. Boiling point elevation

B. Increase in latent heat

C. Vapour pressure lowering

D. Freezing point depression

42 / 50

42. 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 high boiling point.

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

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

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

43 / 50

43.

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 __________

44 / 50

44.

Meter, kelvin, second and kilogram are  examples of _______

45 / 50

45.

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

46 / 50

46.

In a gas. the molecules on the average are separated by large ______ distances

47 / 50

47.

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

48 / 50

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

A. Octane

B. Decane

C. Nonane

D. Heptane

49 / 50

49.

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

50 / 50

50. 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. 29.3 L

B. 32.3 L

C. 27.8 L

D. 47.8 L

Rate this quiz