CIE iGCSE Co-Ordinated Science C2.5 Simple molecules and covalent bonds Exam Style Questions Paper 4
Question
Look at the structures of the carbon compounds shown in Fig. 11.1.
(a) (i) State which compound is made by the catalytic addition of steam to compound A.
Choose from B, C, D or E.
(ii) State which compound is made when compound A reacts with hydrogen gas, H2.
Choose from B, C, D or E.
(iii) State which compound reacts with bromine to form C2H4Br2.
Choose from A, B, C, D or E.
(iv) State which compound forms compound E in an addition polymerisation reaction.
Choose from A, B, C or D.
(b) Fig. 11.2 represents the formation of the polymer nylon from two monomers, X and Y.
Nylon is made in a condensation polymerisation reaction.
Describe how monomer X and monomer Y react together to make nylon.
Use the information in Fig. 11.2 in your answer.
▶️Answer/Explanation
Ans : 11(a)(i) B ;
11(a)(ii) C ;
11(a)(iii) A ;
11(a)(iv) A ;
11(b) any three from:
idea that C on monomer X and N on monomer Y join ;
idea that -OH group is lost from the monomer X ;
idea that -H is lost from monomer Y ;
idea that water is eliminated ;
AVP ;