7-Organic Chemistry

Question 1

What is an hydrocarbon

Answer 1

Compound only containing carbon and hydrogen atoms only

Question 2

What is an Alkane

Answer 2

Simplest form of an hydrocarbon

Question 3

What’s the formula of Alkanes

Answer 3

C H

n 2n+2

Question 4

First 4 alkanes

Answer 4

Methane
Ethane
Propane
Butane

Question 5

Properties of a chain of hydrocarbons

Answer 5

Shorter the chain the runnier, volatile, more flammable

SHORTER CHAINS ARE MORE VALUABLE

Question 6

Combustion equation

Answer 6

Hydrocarbon + oxygen -> Carbon Dioxide + water

Question 7

What is crude oil

Answer 7

A fossil formed through plant remains which were burried in mud and high temperature and pressure turns them into crude oil

Question 8

What is fractional distillation

Answer 8

Separating mixtures which all have different boiling points

Question 9

Why is crude oil important

Answer 9

Fuel for transport

Make products like polymers and lubricants

Question 10

What is cracking

Answer 10

The splitting up of longer chain molecules

Question 11

Why crack molecules

Answer 11

Shorter chain molecules are more desirable as they are used for fuels.
Longer chain molecules are less desirable as they are gloopy and aren’t useful

Question 12

What’s the cracking process

Answer 12

1-heat up the molecules
2-vaporise then (turn into gas)
3-add a catalyst which splits the molecules apart