Question

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?
an element
a pure compound
a pure substance
a mixture

Answer 1

Option (4)

Step-by-step explanation:

Crude oil is referred to the fossil fuel that is formed from the burial of ancient flora and fauna. These are often found to be trapped in the sedimentary type of rocks such as sandstone and limestone.

These are a highly complex mixture of hydrocarbons, comprised of paraffin, naphthenes, asphalts and some other aromatic hydrocarbons. They are also found to contain a low amount of sulfur and some trace amounts of nitrogen as well as oxygen compounds.

These oils can also be refined in order to make diesel, petrol and gasoline.

Thus, the correct answer is option (4).

Answer 2

It is a mixture.

Step-by-step explanation:

Crude oil is obtained from the earth.

It is a mixture of several substances.

The substances can be obtained by the fractional distillation, because they all have different melting and boiling points.