A student carried out a cracking reaction on hydrocarbon, P, and obtained two products; Q and R.
The student then made the following notes:
| 1 | Q is unsaturated. |
| 2 | R will decolourise bromine water. |
| 3 | A molecule of P has 7 carbon atoms. |
Which of the statements are correct?
1 & 3
1 & 2
2 & 3
1, 2 & 3
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Compound X is shown in the dot-and-cross diagram.
Which statement about compound X is correct?
It is a saturated hydrocarbon.
It is an isomer of butene.
It will decolourise bromine water.
Its name is propane.
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Which row correctly describes alkenes?
|
|
saturated or unsaturated |
result when shaken with aqueous bromine |
|
A |
saturated |
no change |
|
B |
saturated |
the aqueous bromine is decolourised |
|
C |
unsaturated |
no change |
|
D |
unsaturated |
the aqueous bromine is decolourised |
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The diagram shows a sequence of reactions.
Which row correctly names the processes P, Q and R?
| P | Q | R | |
| A | distillation | fermentation | respiration |
| B | distillation | hydration | combustion |
| C | cracking | fermentation | respiration |
| D | cracking | hydration | combustion |
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Hydrocarbons separated by fractional distillation of petroleum can be cracked to make useful shorter chain products.
Which substance is not a product of the cracking of propane, Mr 44?
C4H8
C2H4
C3H6
H2
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The apparatus below was used to test gas Y
The bromine solution quickly went colourless.
What is the correct structure of gas Y?
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