4.4 polymers mrs moore

Given the structural formula of a molecule, how can you determine if it can undergo polymerisation?

• By checking if it has a double bond or functional groups capable of forming bonds.

• By measuring its molecular weight.

• By determining its solubility in water.

• By analysing its colour.

What type of polymerisation occurs when monomers with double bonds react to form a polymer?

• Condensation polymerisation

• Addition polymerisation

• Hydrolysis

• Oxidation

Which of the following is a characteristic of condensation polymerisation?

• It involves the elimination of small molecules like water.

• It requires a catalyst to proceed.

• It only occurs at high temperatures.

• It produces polymers with no by-products.

Identify the repeating unit in the polymer chain given the structural formula of polyvinyl chloride (PVC).

What is one advantage of synthetic polymers?

• They are biodegradable.

• They can be tailored to have specific properties.

• They are always cheaper than natural materials.

• They are non-toxic.

What is a disadvantage of synthetic polymers?

• They are always more durable than natural materials.

• They can contribute to environmental pollution.

• They are always more expensive to produce.

• They are biodegradable.

How do thermoplastic polymers behave when heated?

• They become softer and can be reshaped.

• They become harder and more brittle.

• They decompose immediately.

• They remain unchanged.

What happens to thermoset polymers when they are heated?

• They melt and can be reshaped.

• They become softer.

• They decompose or char.

• They expand.

How does the degree of cross-linking affect the rigidity of a polymer?

• More cross-linking decreases rigidity.

• More cross-linking increases rigidity.

• Cross-linking has no effect on rigidity.

• Less cross-linking increases rigidity.

Which of the following polymers is likely to have the highest melting point?

• A polymer with weak secondary interactions.

• A polymer with strong secondary interactions.

• A polymer with no cross-linking.

• A polymer with a low molecular weight.