A__enes take part in addition reaction(bromination) or test for unsaturation. But
alkanes don’t.
Alkenes
In alkanes, if the number of Carbon atoms is 8, what is the number of Hydrogen atoms?
18
True or False. Carbon can bond to other non-metals.
True
Draw on the board the structural formula of 1,2-dibromoethane
What is an unsaturated molecule?
A molecule with a double bond
Name this molecule
But-1-ene or Butene only
How can you tell an alkane from an alkene
An alkane has a single while alkene has a double bond
How many Carbons does Pentane has?
5
General formula for alkynes
CnH2n-2
What does LPG means?
Liquefied Petroleum Gas
What is the atomic number of Carbon?
6
What is the general formula of alkenes?
CnH2n
True or False. If
an alkene, such as ethene, is shaken with a solution of bromine in water, the bromine loses its color.
True
Wha are the uses of butane. Give at least one?
Used in portable gas fires, portable
camping stoves, blow-torches and gas lighters.
What is the simplest alkane? M______
methane
The
presence of C=C makes al_________s much more reactive than alkanes.
alkenes
What is the number of valence electrons of Carbon?
4
Name this molecule
Propane
What is the simplest alkene?
ethene or ethylene
What is the other name of Cylinders of butane gas which are used in portable gas fires? C_______ G__
Calor gas
Alkynes
are molecules containing triple bond The simplest member is ________
or acetylene. Answer: E___yne
ethyne
True or False. Alkene is an example of saturated hydrocarbon.
False. Alkanes only
True or False.The
carbon atoms can be linked by single or double bond only but not triple bond.
False
What is the difference between the following: Molecular Formula, Empirical Formula, Structural formula?
What are the three structural forms of Carbon?
Diamond, Graphite and Fullerene
What is the state of matter of the first 4 alkanes?
Gas
Name this molecule
Prop-1-ene or Propene only
True or False. Carbon
atoms can join to each other to form long
chains.
True
Draw on the board the possible structures of C4H10 as isomers.
What do you call the alkane that form the major part of natural gas? Me_____
Methane
Draw on the board the structural formula of But-1-ene
What is the general formula for an alkane?
CnH2n+2
How many Hydrogens does Butane has?
10
What is the chemistry of carbon-containing compounds?
Organic Chemistry
True or False. Carbon
atoms cannot arrange themselves in rings.
False
What are the two products of burning alkanes
CO2 and H2O
What are the four Carbon containing compounds found in living organisms. Answers: Carbohydrates, L_____________, P____________, N___________ A___________
Carbohydrates, Lipids, Proteins and Nucleic Acids
True or False. Alkanes do not react with bromine water.
True
How many carbons does Methane has?
1
The type of reaction, where a double bond breaks and adds two new atoms is known as add_____________n reaction
Addition reaction
What is the new form of carbon
discovered recently with it uses? F_____ene
Fullerene-it is use in Nanotechnology
How many Carbons does Ethene have?
Two
True or False. Isomers have the same molecular formula but different structures.
True
What are the elements present in Hydrocarbons?
Carbon and Hydrogen
Give at least three examples of Hydrocarbons.
Alkanes, alkenes and alkynes
What is the general formula for an alkene
CnH2n
How many Carbons does Propene have?
Three
True or False. All alkanes burn exothermically.
True
Give an example of saturated hydrocarbon.
All alkanes
What are the two examples of unsaturated hydrocarbons?
Alkenes and alkynes
Draw on the board the structural formula of But-2-ene
In alkenes, if the number of Carbon atoms is 7, what is the number of Hydrogen atoms?
14
Name the alkane used as LPG. B____e
Butane
If Carbon 1 to 4 is in Gas state, what is the state of the 5th to 16th carbon?
Liquid
Name this molecule
Ethane
True or False. Carbon is a metal.
False