CIE iGCSE Co-Ordinated Science C11.5 Alkenes Exam Style Questions Paper 4
Question
Fig. 5.1 shows the structures of four carbon compounds.
(a) (i) State which compound is ethene.
Choose from A, B, C or D.
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(ii) State which compound is an unsaturated hydrocarbon.
Choose from A, B, C or D.
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(iii) Compound B is made from compound D.
State what type of reaction takes place.
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(iv) Describe how compound C is made from compound D.
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(v) Compound A is a member of a homologous series.
State two similarities between the members of a homologous series.
1 ……………………………………………………………………………………………………………………….
2 ……………………………………………………………………………………………………………………….
(b) Fig. 5.2 shows the structure of a carbon atom.
(i) Carbon is in Group IV of the Periodic Table.
Describe how to deduce from Fig. 5.2 that carbon is in Group IV.
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(ii) Carbon exists as a mixture of isotopes.
Complete Fig. 5.3 to show a different isotope of carbon from that shown in Fig. 5.2.
▶️Answer/Explanation
Ans : 5(a)(i) D ;
5(a)(ii) D ;
5(a)(iii) addition polymerisation ;
5(a)(iv) addition of steam ;
using a catalyst ;
5(a)(v) general formula ;
chemical properties ;
5(b)(i) (carbon has) 4 electrons in the outer shell ;
5(b)(ii) diagram showing:
6 protons ;
6 electrons in the correct configuration of 2.4 ;
any number of neutrons other than 6 ;