Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
81–90 of 785
Question 81
1 mark · Easy
Answer and see the solution →State the general rule for numbering the carbon atoms in a chain when naming an alkene.
Question 82
3 marks · Easy
Answer and see the solution →(a)[1 mark]State the number of carbon atoms in a molecule named 'butane'.
(b)[1 mark]Write the name of the homologous series that 'butane' belongs to.
(c)[1 mark]Give the ending that shows a compound contains a carbon–carbon double bond.
Question 83
2 marks · Easy
Answer and see the solution →A molecule of hexene contains six carbon atoms. Use the general formula for alkenes to calculate the number of hydrogen atoms in one molecule of hexene.
Question 84
2 marks · Normal
Answer and see the solution →State the number of carbon atoms in a molecule with the code letters 'prop' in its name and give the name of the corresponding alkane.
Question 85
4 marks · Normal
Answer and see the solution →(a)[1 mark]Define organic chemistry.
(b)[1 mark]Give the general formula for alkanes.
(c)[1 mark]State the characteristic feature that distinguishes alkenes from alkanes.
(d)[1 mark]Name the class of compounds with only carbon and hydrogen atoms joined by single covalent bonds.
Question 86
3 marks · Normal
Answer and see the solution →A hydrocarbon has 6 carbon atoms in a straight chain and is an alkane. Calculate the number of hydrogen atoms in one molecule of this compound.
Question 87
3 marks · Normal
Answer and see the solution →Explain how the name but-2-ene shows both the number of carbon atoms and the position of the double bond in the molecule.
Question 88
4 marks · Normal
Answer and see the solution →Table 1 shows the names and code letters for some organic compounds.
Table 1 Name Code letters for chain Number of carbon atoms methane meth butane but pentane pent ethane eth Complete the table by filling in the number of carbon atoms for each compound.
Question 89
1 mark · Normal
Answer and check →Which ending in the name of an organic compound indicates only carbon–carbon single bonds?
- A.ol
- B.ene
- C.ane
- D.one
Question 90
2 marks · Normal
Answer and see the solution →Name the homologous series to which each of the following compounds belongs: (a) CH3CH2CH3 (b) CH2=CH2