Crude oil is a ____________of alkanes with different boiling points.
The crude oil is heated to form a ________ .
The fractionating column gets ___________ with height.
The ___________ chain molecules condense and are removed as liquids lower down the column.
The remaining ____________chain molecules continue up the column as gasses until they get to their condensation temperature.
Note each fraction is a mixture of hydrocarbons with similar boiling points.
Other Answer Choices:
longer
gas
shorter
cooler
mixture
liquid
warmer
Question 3
3.
The copper (II) sulfate solution is not used up but does increase the rate of raction.
The copper sulfate is acting as a _____________by providing an alternate _____________________ of lower ______________________.
The test for hydrogen gas is to use a ________ splint and the positive results is that ________________ (note water is also formed).
Other Answer Choices:
reaction pathway
the splint relights
lit
catalyst
activation energy
a pop sound
glowing
Question 4
4.
Decane is a ___________ and is therefore a ______________ hydrocarbon.
Decane has a simple molecular substance and is a ___________ at room temperature.
The catalyst is a _______________ tile or ____________________ powder.
The gases are passed through water to _____________alkane.
The ethene has a boiling point below room temperature and remains as a gas that can be collected _______________.
When a few drops of bromine water are added to either decane or the liquid alkane there would be ______________________.
When a few drops of bromine water are added to ethene the bromine water would decolourise (___________ to _______________
Other Answer Choices:
over water
condense
liquid
no visible change
orange
alkane
porcelain
saturated
Aluminium oxide
colourless
Question 5
5.
________ ________ ________
Check monomer
a) n in front,
b) double bond
Check polymer
a) n as subscript
b) single bond
c) bonds extend through the brackets.
Other Answer Choices:
Question 6
6.
Number of elements = ______
Number of atoms = ______
What type of structure is present (be careful)! ________________
(Hint NH4+ and Cl-)
This process is ______________________
Other Answer Choices:
metallic
simple covalent
5
2
6
4
giant ionic
exothermic
3
giant covalent
1
endothermic
Question 7
7.
This process is called ___________________
Other Answer Choices:
crystalisation
simple distillation
filtration
fractional distillation
chromatography
Question 8
8.
What is the final volume reading = _______ cm3
What is the predicted volume reading if the original volume was 100cm3 = _______cm3
What has happened to percentage volume of O2 in the atmosphere over time = ______________ due to ___________________
Other Answer Choices:
bioleaching
photosynthesis
phytoextraction
76
increased
79
decreased
Question 9
9.
buckminsterfulerine has a ______________________ structure while diamond has a has a ___________________ structure.
The __________________________ that must be overcome when melting buckminsterfulerine are weaker than ___________________that need to be broken when melting diamond. This means that less energy is required and the melting point is lower.
Other Answer Choices:
simple molecular
giant covalent
intermolecular forces
covalent bonds
Question 10
10.
What is missing from the funnel in step 2? _________________
step 1 = ________________________
Step 2 = _______________ collect the NaCl(aq) as the _____________ discard the SiO2 as the ____________
Step 3 = ____________________(note we would use a water bath to evaporate some of the water before leaving the saturated solution in a warm dry place. Finally the crystals would be rinsed with a minimum volume of cold distilled water
Other Answer Choices:
filter paper
dissolving the NaCl
residue
filtration
filtrate
crystallisation
Question 11
11.
This process is called ______________.
What is the RFM of HCl ( ______________________)
What is the RFM of NH3 _______
What is the relationship between the RFM and the rate of diffusion?
As the RFM increases the rate of diffusion ______________.
Other Answer Choices:
decreases
17
diffusion
36.5
increases
Question 12
12.
What is the product of the combustion of hydrogen __________ .
The cold water is used to make the __________condense.
__________makes anhydrous copper sulfate turn from __________ to _________.
Combustion of hydrogen is an _______________ process. (note if the (blue) hydrated copper sulfate is heated (white) anhydrous copper sulfate is formed). This is known as a reversible reaction.
Other Answer Choices:
blue
white
exothermic
endothermic
water
carbon dioxide
Question 13
13.
P
Q
R
S
T
u
is a hydrocarbon
is not a hydrocarbon
Question 14
14.
P
Q
R
S
T
u
is an alkane
is an alkene
Contains a halogen
Question 15
15.
P
Q
R
S
T
u
would not turn bromine water from orange to colourless
Would turn bromine water from orange to colourless
Question 16
16.
This reaction is _______________ as the temperature has ______________
The energy needed to break the bonds in the reactants is __________ than the energy released when the new bonds form in the products.
Other Answer Choices:
decreased
exothermic
lower
greater
increased
endothermic
Question 17
17.
The magnesium has a ___________________structure
The O2 has a ______________________structure
The MgO has a _________________ structure.
This reaction magnesium is heated to overcome the ______________________.
Once the combustion reaction starts (if enough oxygen is allowed to enter the crucible) the reaction continues without additional heating. This shows that the reaction is _______________.