Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
331–340 of 785
Question 331
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 332
2 marks · Easy
Answer and see the solution →Explain why propene has a higher boiling point than ethene.
Question 333
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 334
1 mark · Easy
Answer and see the solution →State the physical state of butene at room temperature.
Question 335
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 336
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 337
2 marks · Normal
Answer and see the solution →State the general formula for alkenes. Write the molecular formula for the alkene with six carbon atoms.
Question 338
4 marks · Normal
Answer and see the solution →Ethene, propene and butene are alkenes.
(a)[3 marks]Complete the table to show the number of carbon (C) and hydrogen (H) atoms in each alkene.
Alkene Number of C atoms Number of H atoms Ethene 2 Propene Butene (b)[1 mark]State the physical state (solid, liquid or gas) of these alkenes at room temperature.
Question 339
3 marks · Normal
Answer and see the solution →An alkene molecule contains 14 hydrogen atoms. Calculate the number of carbon atoms it contains. Show your working.
Question 340
3 marks · Normal
Answer and see the solution →Hexene (C6H12) and butene (C4H8) are both alkenes. Explain why hexene has a higher boiling point than butene, referring to their structure and trends among alkenes (C2–C4).