O LevelChemistryCambridge (CIE)Exam Questions11. Organic Chemistry11.4 Alkanes

Alkanes (Cambridge (CIE) O Level Chemistry): Exam Questions

Exam code: 5070

57 mins9 questions

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11.4 Alkanes

1a
1 mark

A liquid alkane was passed over heated aluminium oxide to make ethene.

cracking

What is the purpose of the mineral wool?

How did you do?

1b
1 mark

What is this type of chemical reaction called?

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1c
2 marks

Give a test for ethene. test ..................................................................................... result ..................................................................................

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1d
2 marks

What precaution should be taken in the experiment when the heat is removed? Explain.

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2a
2 marks

The diagram shows how ethene can be made by cracking liquid alkanes.

cracking-lab-exam-image-no-heat

Indicate with arrows on the diagram where heat is applied.

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2b
2 marks

Give a chemical test to show the presence of ethene.

test ....................................................................................................

result ....................................................................................................

How did you do?

2c
2 marks

Why must the delivery tube be removed from the water before the heat is turned off?

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3a
2 marks

Ethene gas was formed by the cracking of a liquid alkane. The diagram shows the apparatus used.

Identify two mistakes in the diagram.

 

 

1 ....................................................................................................

 

 

2 ....................................................................................................

 

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3b
2 marks

Describe a test to show the presence of ethene.

test ....................................................................................................

result ....................................................................................................

How did you do?