Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Alkenes
106 practice questions
Topics covered
Practice questions
11–20 of 44 · Easy
Question 11
2 marks · Easy
Answer and see the solution →An alkene molecule contains 10 carbon atoms. Calculate the number of hydrogen atoms it contains. Show your working.
Question 12
2 marks · Easy
Answer and see the solution →Explain why propene has a higher boiling point than ethene.
Question 13
3 marks · Easy
Answer and see the solution →Some information about alkenes. Name Number of Hydrogen atoms Ethene 4 Butene 8 Alkene X 12 (a)[2 marks]For each compound, state its molecular formula.
(b)[1 mark]Name alkene X.
Question 14
1 mark · Easy
Answer and see the solution →State the physical state of butene at room temperature.
Question 15
3 marks · Easy
Answer and see the solution →(a)[1 mark]Write the general formula for alkenes.
(b)[1 mark]Write the molecular formula for the alkene with 7 carbon atoms.
(c)[1 mark]How many hydrogen atoms are there in this molecule?
Question 16
2 marks · Easy
Answer and see the solution →The boiling point of ethene is -104°C, and that of propene is -47°C. Calculate the difference in boiling points between these two alkenes.
Question 17
1 mark · Easy
Answer and see the solution →State the general formula for alkenes.
Question 18
3 marks · Easy
Answer and see the solution →(a)[1 mark]State what is meant by an addition reaction of an alkene.
(b)[1 mark]Write the word equation for the reaction between ethene and bromine.
(c)[1 mark]What structural feature of ethene allows it to take part in addition reactions?
Question 19
2 marks · Easy
Answer and see the solution →An alkene has 15 carbon atoms in its molecule. Calculate the number of hydrogen atoms in one molecule of this alkene. Show your working.
Question 20
2 marks · Easy
Answer and see the solution →Explain why alkenes burn to produce carbon dioxide and water when heated in oxygen.