Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Organic Chemistry
785 practice questions
Topics covered
Practice questions
161–170 of 317 · Easy
Question 161
2 marks · Easy
Answer and see the solution →Explain, with reference to the products formed, why the reactions of ethene with hydrogen and with steam are both called addition reactions.
Question 162
3 marks · Easy
Answer and see the solution →Addition reactions of ethene Reactant Product Type of Reaction Hydrogen Water (steam) (a)[2 marks]Complete the table by naming the products of these reactions.
(b)[1 mark]State the type of reaction for both cases.
Question 163
1 mark · Easy
Answer and see the solution →Write the molecular formula of the product when ethene is hydrogenated.
Question 164
3 marks · Easy
Answer and see the solution →(a)[1 mark]Name the starting materials used in the industrial production of ethanol from ethene.
(b)[1 mark]Write the balanced equation for this process.
(c)[1 mark]State one condition required for this reaction.
Question 165
2 marks · Easy
Answer and see the solution →How many moles of hydrogen are needed to react with 0.60 mol of ethene during hydrogenation?
Question 166
5 marks · Easy
Answer and see the solution →This question is about alkenes with up to four carbon atoms and their physical properties.
(a)[1 mark]Draw the displayed formula of ethene.
(b)[1 mark]Give the general formula for all alkenes.
(c)[2 marks]State the physical state of propene and butene at room temperature.
(d)[1 mark]Complete this sentence: "The physical state of small alkenes (up to butene) at room temperature is similar to the physical state of small _____."
Question 167
5 marks · Easy
Answer and see the solution →The table below shows two hydrocarbon molecules.
Molecule Structural formula A CH_3CH=CH_2 B CH_3CH_2CH_3 (a)[2 marks]Which molecule is unsaturated? Explain your answer.
(b)[1 mark]State how the presence of a C=C bond affects the chemical properties of alkenes.
(c)[1 mark]Describe the physical state of molecule A at room temperature.
(d)[1 mark]Compare the boiling points of molecule A and molecule B.
Question 168
5 marks · Easy
Answer and see the solution →Answer the questions about alkenes below.
(a)A straight-chain alkene has the formula C4H8. Draw the displayed formula of one isomer of C4H8 and name it.
(i)[1 mark]Draw the displayed formula.
(ii)[1 mark]Name this isomer.
(b)[2 marks]The general formula for alkenes is CnH2n. Calculate the molecular formula of the alkene with 7 carbon atoms.
(c)[1 mark]Explain how the physical state of the C7 alkene compares to the C4 alkene at room temperature.
Question 169
5 marks · Easy
Answer and see the solution →This question is about the structure and properties of small alkenes.
(a)[1 mark]Draw the displayed formula of propene.
(b)[1 mark]State whether butene is a gas, liquid or solid at room temperature.
(c)[2 marks]Describe the trend in boiling points as the number of carbon atoms increases from ethene to butene.
(d)[1 mark]Name the homologous series to which these alkenes belong.
Question 170
1 mark · Easy
Answer and see the solution →State the number of carbon atoms in a molecule of ethanol.