Polymer

Free sample questions

Polymer — sample Chemistry questions with answers

1. Question 1

   What is meant by a polymer?

   • ASmall molecules that combine to form a large molecule
   • BLarge molecules consisting of repeating small units
   • CMolecules that consist of only two atoms
   • DMolecules that cannot be broken down into smaller units

   Answer: B. Large molecules consisting of repeating small units

   A polymer is a large molecule (macromolecule) built from repeating small units called monomers.

2. Question 2

   The monomer for polyethene is

   • A${\text{CH}}_4$
   • B${\text{C}}_2{\text{H}}_4$
   • C${\text{C}}_2{\text{H}}_2$
   • D${\text{C}}_3{\text{H}}_6$

   Answer: B. $\text{C}_2\text{H}_4$

   Polyethene is produced from the addition polymerisation of ethene monomer, which is ${\text{C}}_2{\text{H}}_4$.

3. Question 3

   The type of polymerisation that involves the removal of a small molecule such as water is

   • AAddition polymerisation
   • BCondensation polymerisation
   • CFree radical polymerisation
   • DCationic polymerisation

   Answer: B. Condensation polymerisation

   Condensation polymerisation involves the combination of monomers with the removal of a small molecule such as water or methanol.

4. Question 4

   Which of the following is a synthetic polymer?

   • AStarch
   • BCellulose
   • CNylon
   • DProtein

   Answer: C. Nylon

   Nylon is a synthetic polymer produced through condensation polymerisation, while starch, cellulose and protein are natural polymers.

5. Question 5

   What type of bonding exists in thermoplastic polymers?

   • ACovalent cross-linking between chains
   • BHydrogen bonding between chains
   • CVan der Waals forces between chains
   • DIonic bonding between chains

   Answer: C. Van der Waals forces between chains

   Thermoplastic polymers have weak van der Waals forces between chains, allowing them to be softened when heated.