Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
181–190 of 335 · Normal
Question 181
1 mark · Normal
Answer and check →Which of the following is the correct IUPAC name for the alcohol with the structural formula CH3CHOHCH2CH3?
- A.butan-2-ol
- B.butan-1-ol
- C.butanol-2
- D.butenal
Question 182
2 marks · Normal
Answer and see the solution →State the molecular formula and the structural formula for ethanol.
(a)[1 mark]Molecular formula
(b)[1 mark]Structural formula
Question 183
4 marks · Normal
Answer and see the solution →Answer the following questions about the alcohol with the displayed formula:
(a)[1 mark]State the IUPAC name for this alcohol.
(b)[1 mark]Give its molecular formula.
(c)[1 mark]Write its structural formula.
(d)[1 mark]Explain why this alcohol is the simplest member of its homologous series.
Question 184
2 marks · Normal
Answer and see the solution →State the IUPAC name for the alcohol with the structural formula CH3CH2CH2OH. Explain which features of the name identify it as an alcohol.
Question 185
4 marks · Normal
Answer and see the solution →This question is about different alcohols up to four carbon atoms.
(a)[2 marks]Draw the displayed formula of ethanol. Show all bonds clearly.
(b)[1 mark]State the molecular formula of butan-1-ol.
(c)[1 mark]Give the structural formula for methanol.
Question 186
3 marks · Normal
Answer and see the solution →An alcohol contains four carbon atoms in a straight chain with the –OH group attached to the second carbon.
State the IUPAC name of this alcohol. Show all steps in your answer.
Question 187
2 marks · Normal
Answer and see the solution →State the names of the two products formed when ethanol burns completely in air.
Question 188
4 marks · Normal
Answer and see the solution →Ethanol is a member of the alcohol homologous series. When ethanol is burned in air, it reacts with oxygen.
(a)[2 marks]Write a balanced chemical equation for the complete combustion of ethanol.
(b)[2 marks]Give one use of ethanol as a fuel and explain why it is considered a biofuel.
Question 189
3 marks · Normal
Answer and see the solution →Calculate the minimum mass of oxygen needed to completely burn 4.6 g of ethanol ( 2H5OH). (Molar masses: C = 12, H = 1, O = 16)
Question 190
3 marks · Normal
Answer and see the solution →Explain why burning ethanol as a fuel is considered more sustainable than burning petrol. Include reference to raw materials and renewability.