Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
131–140 of 317 · Easy
Question 131
1 mark · Easy
Answer and see the solution →State what feature of alkenes makes them unsaturated hydrocarbons.
Question 132
3 marks · Easy
Answer and see the solution →(a)[2 marks]Draw the displayed formula of a straight-chain isomer of butene where the double bond is between the second and third carbon atoms.
(b)[1 mark]Name this isomer.
Question 133
2 marks · Easy
Answer and see the solution →Calculate the molecular formula of the alkene with 6 carbon atoms.
Question 134
1 mark · Easy
Answer and see the solution →State the general formula for alkenes.
Question 135
3 marks · Easy
Answer and see the solution →(a)[1 mark]Describe the physical state of ethene, propene and butene at room temperature.
(b)[2 marks]Explain how the boiling points of these alkenes change as the number of carbon atoms increases.
Question 136
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 137
2 marks · Easy
Answer and see the solution →Explain why propene has a higher boiling point than ethene.
Question 138
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 139
1 mark · Easy
Answer and see the solution →State the physical state of butene at room temperature.
Question 140
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?