Chem Macromolecules AfL

1 Name:______________________________( ) Class:_________ Date:___________ AFL Macromolecules Multiple-Choice Questions (10 marks) 1. Which of the following hydrocarbon molecules can be polymerised? A CH 4 B C2H6 C C 3H6 D C 4H10 ( ) 2. The flow diagram represents a possible method of manufacturing poly(ethene) from the raw material of petroleum. Which of the following correctly identifies the three processes K, L and M? Process K Process L Process M A Polymerisation Cracking Fractional distillation B Cracking Fractional distillation Polymerisation C Fractional distillation Cracking Polymerisation D Fractional distillation Polymerisation Cracking ( ) 3. Part of the formula of a polymer is shown below. What is the molecular formula of its monomer? A CH 3 B C3H6 C C 3H8 D C 6H12 ( ) CH3 CH3 CH CH2 CH CH3 CH2 CH CH2 25 Process Process Poly(ethene) Ethene Branched alkane Petroleum K L M Process

2 4. What do the properties of propene and poly(propene) have in common? 1 Chemical properties 2 Empirical formula 3 Percentage composition 4 Relative molecular mass A 1 and 2 B 2 and 3 C 3 and 4 D 2, 3 and 4 ( ) 5. A section of the structure of poly(chloroethene) is shown below. The letters P, Q and R represent the atoms of the different elements. Which of the following correctly identifies all three elements? Element P Element Q Element R A Carbon Hydrogen Chlorine B Hydrogen Carbon Chlorine C Chlorine Carbon Hydrogen D Chlorine Hydrogen Carbon ( ) 6. The diagram shows how a nylon thread can be made by simply reacting two immiscible solutions. P Q P Q P R P Q P Q P R P Q P Q P R Nylon thread forms between the two solutions. solution X solution Y

3 What can the two solutions X and Y be? Solution X Solution Y A Diamine Dicarboxylic acid B Diol Diamine C Dicarboxylic acid Diol D Ester Amide ( ) 7. Which of these polymers has an empirical formula of CH? A B C D ( ) 8. The structure of a polymer is represented as shown below. Which two monomer units could be used to produce this polymer? Monomer 1 Monomer 2 A HO–CH2–CH2–OH HOOC–CH 2–CH2–CH2–COOH B HO–CH2–CH2–CH2–OH HO–C–CH 2–CH2–COOH C HO–CH2–CH2–COOH HO–CH 2–CH2–CH2–OH D H–CH2–CH2–COOH H–CH 2–CH2–CH2–OH ( ) CH2 O CH2 O C O CH2 CH2 CH2 C O C C H H H C6H5 CH3 C C H H CH3 C C H H H H CH3 C C H H H n n n n n

4 9. A substance which is biodegradable __________. A burns easily to produce colourless fumes B can be absorbed through the roots of plants C is broken down by bacterial decay D is produced in biological reactions ( ) 10. Plastics are a pollution problem because many plastics __________. A are made from crude oil B are very flammable C burn to produce toxic fumes D decompose to produce toxic products ( ) Structured Questions (15 marks) 11. Explain the difference between addition polymerisation and condensation polymerisation. [2] 12. Consider the four polymers below. P Q R S C Cl C H H H n C C CH3 H H H n n N C (CH2)5 | H || O n C6H4 C O O (CH2)2 |O C |O

5 (a) Which of these are addition polymers and which are condensation polymers? [2] (b) Draw the structure(s) of the monomer(s) needed to form each of these four polymers. [4] 13. PVC (polyvinyl chloride) is an important artificial plastic. Vinyl chloride is also called chloroethene and can be manufactured by the addition reaction between 1 mol of ethyne (C2H2) and 1 mol of hydrogen chloride gas (HCl). (a) ‘Chloroethene is the monomer of this plastic.’ What does this statement mean? [1] (b) Write the chemical equation for the formation of chloroethene. [1] P Q R S

6 (c) What is the mass of chloroethene that would be produced from 4 dm3 of ethyne gas and excess hydrogen chloride? Assume that the volumes are measured at room temperature and pressure. [Molar gas volume = 24 dm3. Ar: C = 12; H = 1; Cl = 35.5] [2] (d) Give one use of PVC and explain the properties of PVC that make it suitable for that particular use. [1] (e) When PVC is burnt, a thick black smoke and a strong acidic gas are produced. Suggest the identity of the (i) black smoke; [1] (ii) acidic gas. [1]