Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
171–180 of 317 · Easy
Question 171
3 marks · Easy
Answer and see the solution →(a)[1 mark]Draw the displayed formula of methanol.
(b)[1 mark]Give the molecular formula for methanol.
(c)[1 mark]State the functional group present in methanol.
Question 172
2 marks · Easy
Answer and see the solution →The displayed formula of an alcohol shows four carbon atoms in a straight chain, with the –OH group attached to the terminal (end) carbon.
Calculate the total number of hydrogen atoms in one molecule of this alcohol. Give your answer using IUPAC naming if possible.
Question 173
2 marks · Easy
Answer and see the solution →Explain why butan-1-ol and propan-1-ol are both classified as alcohols, even though they have a different number of carbon atoms.
Question 174
3 marks · Easy
Answer and see the solution →Table 1. Formulae for some alcohols Name Molecular formula methanol CH4O ethanol C2H6O propan-1-ol C3H8O butan-1-ol C4H10O (a)[1 mark]Name the alcohol with the molecular formula C3H8O.
(b)[1 mark]What pattern do you notice in the number of hydrogen atoms as the number of carbon atoms increases by one?
(c)[1 mark]Predict the molecular formula for the next alcohol in the series after butan-1-ol.
Question 175
1 mark · Easy
Answer and see the solution →What is the displayed formula for ethanol expected to show clearly between the oxygen and hydrogen atoms?
Question 176
3 marks · Easy
Answer and see the solution →(a)[1 mark]Write the IUPAC name of the alcohol with this structural formula: CH3CH2CH2OH.
(b)[1 mark]State the number of carbon atoms in this molecule.
(c)[1 mark]Give the general formula for straight-chain alcohols.
Question 177
2 marks · Easy
Answer and see the solution →Butan-1-ol has the molecular formula C4H10O.
Calculate the number of hydrogen atoms needed to form two molecules of butan-1-ol.
Question 178
1 mark · Easy
Answer and see the solution →State the names of the two products formed when ethanol is completely burned in air.
Question 179
3 marks · Easy
Answer and see the solution →Ethanol, C2H5OH, burns in air.
(a)[1 mark]Write the balanced chemical equation for the complete combustion of ethanol.
(b)[1 mark]State the name of the homologous series to which ethanol belongs.
(c)[1 mark]Name the functional group present in ethanol.
Question 180
2 marks · Easy
Answer and see the solution →Calculate the total number of oxygen atoms in the products formed when one molecule of ethanol combusts completely in air. Show your working.