Chemistry Quiz II

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1. If the chemical properties of a substance remain unchanged and the appearance or shape of an substance changes it is called a

• A) Chemical change
• B) Physical change
• C) Both a physical and chemical change
• D) Neither a physical or chemical change

2. Two solutions are added together and the new solution becomes hot. This tells you that

• A) a gas is being produced.
• B) the solutions are not soluble.
• C) the physical properties are the same.
• D) a chemical change is taking place.

3. Jolene wants to experiment with sugar cubes. Which of the following causes a sugar cube to only change physically, not chemically?

• A) burning the sugar cube with a match
• B) crushing the sugar cube and dissolving it in water
• C) dehydrating the sugar cube with sulfuric acid
• D) chewing the sugar cube and digesting it

4. Diane draws a picture on a piece of paper and then folds it into a paper airplane. She throws it at her little brother, and it hits him in the head. He responds by ripping up the paper. Which of the following is an example of a physical change?

• A) ripping up the paper
• B) folding the paper into an airplane
• C) drawing on the paper
• D) all of these

5. What property stays the same during physical and chemical changes?

• A) density
• B) mass
• C) shape
• D) arrangement of molecules/atoms

6. Which of the following is an example of a chemical change?

• A) melting solid gold
• B) burning hydrogen gas
• C) dissolving sugar in water
• D) breaking a sheet of glass

7. When silver metal comes in contact with sulfur, something new called silver sulfide forms and the silver appears darker. This is a

• A) change of form
• B) chemical change
• C) change of state
• D) physical change

8. Examples of physical properties are:

• A) corrosiveness and strength
• B) flammability and ability to conduct electricity
• C) melting point and solubility
• D) pH and radioactivity

9. Which of the following are chemical changes? (1) Condensation of vapours to liquid (2) Conversion of water to steam (3) Cutting of iron rod (4) Burning a candle.

• A) options 1 and 2
• B) options 1, 2 and 3
• C) option 4 only
• D) options 3 and 4