C7 Organic Chemistry

Question 1

How is crude oil formed?

Answer 1

Remains of living sea creatures that died and decayed in mud millions of years ago

Question 2

What is crude oil made of chemically?

Answer 2

A mixture of Hydrocarbons (made of only hydrogen and carbon_

Question 3

What are the first four alkanes in the homologous series called?

Answer 3

methane

Question 4

Draw the structure of ethane.

Answer 4

(see diagram)

Question 5

How can you separate the different fractions of crude oil?

Answer 5

Fractional distillation

Question 6

Describe the process of fractional distillation. First the crude oil is?. The different fractions?

Answer 6

First the crude oil is?. Heated The liquids boil to give?gases which rise up. The different fractions?condense at different temperatures

Question 7

As the size of the hydrocarbon increases what happens to the boiling point

Answer 7

Increases

Question 8

As the size of the hydrocarbon increases what happens to how easily it flows

Answer 8

Flows less easily (is more viscous)

Question 9

As the size of the hydrocarbon increases what happens to how easy they are to set alight (ignite)

Answer 9

Less easy to set alight

Question 10

What do hydrocarbons react with when they burn?

Answer 10

oxygen

Question 11

What is produced when hydrocarbons burn?

Answer 11

carbon dioxide and water

Question 12

What is cracking?

Answer 12

Breaking down long hydrocarbon chains into shorter ones which are more useful

Question 13

What is the test for an alkene?

Answer 13

Turns bromine water colourless