1. Which of the following is correct for the material pictured?
A gaseous pure substance
A liquid pure substance
A gaseous mixture
A solid mixture
None of the above
Answer: C

2. Which of the following is correct for the material pictured?
A gaseous pure substance
A liquid pure substance
A gaseous mixture
A solid mixture
None of the above
Answer: a

3. Which of the following is a pure substance?
Sweat
Beef stew
Coffee
Apple juice
Ice
Answer: e

4. Which of the following is a pure substance?
Sweat
Beef stew
Coffee
Apple juice
Ice
Answer: e

5. Which of the following is a heterogeneous mixture?
Seawater
Chicken soup
Coffee
Hydrogen peroxide
Ice
Answer: b

6. Which of the following is a heterogeneous mixture?
Seawater
Chicken soup
Coffee
Hydrogen peroxide
Ice
Answer: b

7. Which of the following mixtures is separated best by decanting?
Two aqueous liquids
A solid and a liquid
A volatile liquid and a non-volatile liquid
Two solids
Answer: b

8. Which of the following mixtures is separated best by decanting?
Two aqueous liquids
A solid and a liquid
A volatile liquid and a non-volatile liquid
Two solids
Answer: b

9. Which of the following represents a chemical change?
Freezing water to make ice cubes
Dry ice evaporating at room temperature
Toasting a piece of bread
Dissolving sugar in hot coffee
Crushing an aluminum can
Answer: c

10. Which of the following represents a chemical change?
Freezing water to make ice cubes
Dry ice evaporating at room temperature
Toasting a piece of bread
Dissolving sugar in hot coffee
Crushing an aluminum can
Answer: c

11. Which of the following is a chemical property?
Squeezing oranges to make orange juice
Melting butter for popcorn
Separating sand from gravel
Hydrogen peroxide decomposing to water and oxygen
Ozone as a gas at room temperature
Answer: d

12. Which of the following is a chemical property?
Squeezing oranges to make orange juice
Melting butter for popcorn
Separating sand from gravel
Hydrogen peroxide decomposing to water and oxygen
Ozone as a gas at room temperature
Answer: d

13. Which of the following would NOT be considered an intensive property describing an unknown sample?
It is a solid at 25 °C.
It has a density of 1.38 g/cm3.
It melts at 62.0 ° C.
It has a volume of 0.52 cm3.
It is shiny.
Answer: d

14. Which of the following would NOT be considered an intensive property describing an unknown sample?
It is a solid at 25 °C.
It has a density of 1.38 g/cm3.
It melts at 62.0 ° C.
It has a volume of 0.52 cm3.
It is shiny.
Answer: d

15. The state of matter in which molecules are widely spaced is
a solid.
a liquid.
a gas.
elemental.
molecular.
Answer: C

16. The state of matter in which molecules are widely spaced is
a solid.
a liquid.
a gas.
elemental.
molecular.
Answer: C

17. Which of the following is an example of an amorphous solid?
Diamond
Salt
Gold
Water
Soot
Answer: E

18. Which of the following is an example of an amorphous solid?
Diamond
Salt
Gold
Water
Soot
Answer: E

19. Which of the following is a pure substance?
Sodium
Milk
Blood
Saline solution
Stainless steel
Answer: A

20. Which of the following is a pure substance?
Sodium
Milk
Blood
Saline solution
Stainless steel
Answer: A

21. Which of the following is an element?
Sugar
Salt
Brass
Chlorine
Air
Answer: D

22. Which of the following is an element?
Sugar
Salt
Brass
Chlorine
Air
Answer: D

23. Which of the following is a mixture?
Seawater
Iron ore
Air
Milk
All of the above
Answer: E

24. Which of the following is a mixture?
Seawater
Iron ore
Air
Milk
All of the above
Answer: E

25. Boiling point is an example of a
physical change.
chemical change.
quantitative property.
physical property.
chemical property.
Answer: D

26. Boiling point is an example of a
physical change.
chemical change.
quantitative property.
physical property.
chemical property.
Answer: D

27. How would you classify wine?
Pure substance—compound
Pure substance—element
Mixture—homogeneous
Mixture—heterogeneous
Pure substance—homogenous
Answer: C

28. How would you classify wine?
Pure substance—compound
Pure substance—element
Mixture—homogeneous
Mixture—heterogeneous
Pure substance—homogenous
Answer: C

29. Which of the following is NOT a chemical property?
The density of a liquid
The ability of iron to rust
Flammability of gasoline
Reactivity of acids with metals
All of these are chemical properties.
Answer: A

30. Which of the following is NOT a chemical property?
The density of a liquid
The ability of iron to rust
Flammability of gasoline
Reactivity of acids with metals
All of these are chemical properties.
Answer: A

31. Which of the following is a physical change?
Burning butane
Barbequing a steak
Decomposing water into hydrogen and oxygen gases
Breaking a piece of glass
Baking a cake
Answer: D

32. Which of the following is a physical change?
Burning butane
Barbequing a steak
Decomposing water into hydrogen and oxygen gases
Breaking a piece of glass
Baking a cake
Answer: D

33. Which of the following statements is FALSE?
The freezing of water is a physical change.
The conversion of compounds into elements is a physical change.
Combining sodium metal and chlorine gas to form sodium chloride is a chemical change.
Photosynthesis is an example of a chemical change.
Distilling alcohol from water is a physical change.
Answer: B

34. Which of the following statements is FALSE?
The freezing of water is a physical change.
The conversion of compounds into elements is a physical change.
Combining sodium metal and chlorine gas to form sodium chloride is a chemical change.
Photosynthesis is an example of a chemical change.
Distilling alcohol from water is a physical change.
Answer: B

35. A solution is a(n) element. compound. homogenous mixture.
heterogeneous mixture.
pure substance.
Answer: C

36. A solution is a(n) element. compound. homogenous mixture.
heterogeneous mixture.
pure substance.
Answer: C

37. Matter can be defined as
a substance that cannot be broken down any further.
anything that has mass and occupies space.
a substance composed of two or more elements.
a homogeneous mixture.
None of the above
Answer: B

38. Matter can be defined as
a substance that cannot be broken down any further.
anything that has mass and occupies space.
a substance composed of two or more elements.
a homogeneous mixture.
None of the above
Answer: B

39. Which of the following changes is endothermic?
Water evaporates.
Water freezes.
Butane gas burns.
Steam condenses.
None of the above
Answer: A

40. Which of the following changes is endothermic?
Water evaporates.
Water freezes.
Butane gas burns.
Steam condenses.
None of the above
Answer: A

41. Which of the following is a chemical change?
Sugar is dissolved in water.
Copper metal is rolled into wire.
Ice melts.
All of the above
None of the above
Answer: E

42. Which of the following is a chemical change?
Sugar is dissolved in water.
Copper metal is rolled into wire.
Ice melts.
All of the above
None of the above
Answer: E