This question is about elements, compounds, and mixtures.
a.[1]
Which type of substance is carbon dioxide?
- Element
- Compound
- Mixture
b.[1]
The diagrams in Figure 1 represent different substances using circle models.
◯\bigcirc◯ and ∙\bullet∙ represent atoms of two different elements.
Using Figure 1: Which diagram represents a pure compound?
c.[1]
Which diagram represents a mixture of two elements?
d.[1]
Substances can be separated from mixtures using different methods. State the method used to separate an insoluble solid, such as sand, from liquid water.
e.[1]
A mixture containing three liquids with boiling points of 65∘C65^\circ\text{C}65∘C, 78∘C78^\circ\text{C}78∘C, and 100∘C100^\circ\text{C}100∘C is separated by fractional distillation. Which liquid distils and is collected first?