Test Bank For General Organic and Biological Chemistry 5th Edition by Janice Smith Chapter 1-25 Answers are at the End of Each Chapter Chapter 1
Student name:__________ 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.