Formula of Alkenes
CnH2n
This represents the actual number of atoms in a molecule.
Molecular formula
What is a hydrocarbon?
A hydrocarbon is a compound that contains only hydrogen and carbon.
Bromination is a reaction used as............................................................... (complete the sentence)
Bromination is a reaction used as a chemical test for an unsaturated carbon.
THIS ALKANE FORMS A MAJOR PART OF NATURAL GAS. Choose the correct answer from the bracket (butane, methane, propane)
Methane
The alkenes are ______________ hydrocarbons.
unsaturated.
The simplest alcohol contains one carbon atom. Name the alcohol.
METHANOL
The product formed when ethene reacts with bromine solution. Name the compund.
1,2 - dibromoethane
Alkenes are a homologous series with OH as a functional group. TRUE/FALSE
FALSE
Define Hydrogenation
The addition of hydrogen across a C=C double bond is known as hydrogenation.
Alkanes are chemically ___________ but they burn well.
UNREACTIVE
Molecules with the same molecular formula can have different structures. TRUE/FALSE
TRUE
This shows the simplest possible whole number ratio of the atoms in a compound.
Empirical formula
The molecular formula of Butane
C4H10
What is Isomerism?
When a molecule with the same molecular formula but different structural formulae, which means the same number of atoms can be connected in different ways.
Name the alkane you see in the picture.
Pentane
Name the functional group of alkenes.
It is the carbon carbon double bond.
This shows all the atoms in the molecule and how they are bonded.
Structural formula.
Ethanol is made by an addition reaction of ethene called __________ .
Hydration
When is carbon monoxide produced in a combustion reaction between butane and oxygen?
It is produced when the air supply is less or limited.
The alkanes are unsaturated hydrocarbons. TRUE/FALSE
0
What do the prefixes to the names of the alkanes indicate?
They indicate the number of carbon atoms in the chain.
Butane and Methylpropane are _____________ . They have the same molecular formula but different ____________ .
structural formulae
Alkanes/Alkenes make good fuels.
Alkanes
What is an addition reaction?
A reaction in which a double bond breaks and adds two new atoms is known as an addition reaction.
_______ water is decolorised when shaken with an alkene.
Bromine
Define the term Isomer.
Isomers are compounds that have the same molecular formula but different structural formulae.
Alkenes are more reactive than alkanes. TRUE/FALSE
True
An organic compound has 3 different formulae. What are they?
Empirical, Molecular and Structural formulae.
How many carbon atoms are there in Ethane.
2