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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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