Chemistry Chapter 2 Quiz 2

Chemistry Chapter 2 Quiz 2

Which best describes a compound such as sodium chloride?
NOT A mixture of two common elements that can be separated by physical means
A teacher makes the following statement.

“Gasoline boils at a relatively low temperature (about 150°C). The kerosene is removed at around 200°C, followed by diesel oil at 300°C and fuel oil at around 370°C.”

What topic is the teacher most likely talking about?

NOT evaporation of a mixture
Which is a pure substance?
NOT salt water
When a drawing made with a black marker gets wet, the marker bleeds and more separates into several colors. What method of separation does this describe?
NOT filtration
Which method would be best for separating the components of a mixture that is made from two different liquids?
distillation
The table shows the percentages of hydrocarbons that are found in a sample of crude oil.

Hydrocarbons

Percentage
Paraffins

30
Naphthenes

49
Aromatics

15
Asphaltics

6

Based on the given information, what is the best classification for this sample of crude oil?

NOT a pure compound
Which cannot be separated into simpler substances?
element
Which pure substance can be classified as an element?
H2
Which physical method can be used for obtaining a sample of salt from a small beaker of salt water?
evaporation
Which is a characteristic of mixtures?
They can be separated by physical processes.