Chapter 01 5e
1) Which is NOT an example of a pure substance?
A) sugar
B) air
C) aluminum foil
D) water
E) a block of dry ice (solid CO2)
2) Which is an example of a physical change?
A) the rusting of an iron nail
B) the burning of propane in a gas grill
C) baking cookies
D) polishing tarnished silver
E) melting of an ice cube in a glass of soda
3) Which of the following examples represents a chemical change?
A) the tearing of a piece of paper
B) the melting of an ice cube
C) the burning of a candle
D) the dissolving of table salt (NaCl) in water
E) the evaporation of water from a puddle
4) An unknown solid is taken to the laboratory for analysis. Which of the following examples
represents a chemical property of the unknown solid substance?
A) The density of the solid is 1.66 g/mL.
B) The melting point of the solid is 156°C.
C) The solid is soluble in water and acetone.
D) The substance is odorless in solid form.
E) The substance produces a gas when combined with NaHCO3 in water.
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1) Which is NOT an example of a pure substance?
A) sugar
B) air
C) aluminum foil
D) water
E) a block of dry ice (solid CO2)
2) Which is an example of a physical change?
A) the rusting of an iron nail
B) the burning of propane in a gas grill
C) baking cookies
D) polishing tarnished silver
E) melting of an ice cube in a glass of soda
3) Which of the following examples represents a chemical change?
A) the tearing of a piece of paper
B) the melting of an ice cube
C) the burning of a candle
D) the dissolving of table salt (NaCl) in water
E) the evaporation of water from a puddle
4) An unknown solid is taken to the laboratory for analysis. Which of the following examples
represents a chemical property of the unknown solid substance?
A) The density of the solid is 1.66 g/mL.
B) The melting point of the solid is 156°C.
C) The solid is soluble in water and acetone.
D) The substance is odorless in solid form.
E) The substance produces a gas when combined with NaHCO3 in water.
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