Chemical/ Physical Properties of matter - Question and answers

Question
1. _______________ properties depend upon the size of the sample.
2. _______________ is a property of metals which allows them to be
hammered into thin sheets.
3. _______________ properties can only be observed by carrying out a
chemical reaction.
4. _______________ properties don’t depend on the size of the sample.
5. _______________ properties can be observed without carrying out a
chemical reaction.
6. Which of the following is not an example of an extensive property?
a) density b) mass c) volume d) weight
7. Which of the following is not an example of a physical property?
a) color c) freezing point
b) flammability d) luster
8. Which of the following is an example of an extensive property?
a) length b) melting point c) malleability d) ductility
9. Which of the following is not an example of an intensive property?
a) length b) color c) density d) luster
10. How do intensive properties differ from extensive properties?

Answer key

1. [extensive]—Think of the word extent.
2. [malleability]3. [chemical]—To know if something is flammable, we must try to burn it.
4. [intensive]—Think of these properties as being “in” the substance (intensive),
such as color and density. They don’t change due to the size of the sample.
5. [physical]—You can see that a metal is shiny without trying to carry out a
chemical reaction on it.
6. [A. density]—The density of a material can be used to identify it. It won’t
change due to the size of the sample.
7. [B. flammability]—We only observe the flammability of a substance when
we are carrying out a chemical change (combustion) on it.
8. [A. length]—The length of an object will certainly depend on the size of the
sample.
9. [A. length]—See answer 8.
10. [Intensive properties don’t depend on the amount of the substance (sample
size) present, whereas extensive properties do.]—The extensive properties
of a substance will change with the size of the sample. For example, the
color (intensive property) of table salt is the same, regardless of how much
of it you have. The weight (extensive property) of your salt sample will
certainly depend upon the size of your sample. (The wording of your answer
may vary from mine.)