Polymer and Plastics

Multiple Choice

What is a polymer?

• A type of metal

• A small molecule

• A large organic molecule

• A natural resource

Explanation Slide...

A polymer is defined as a large organic molecule made up of repeating structural units called monomers. This distinguishes it from metals and small molecules, making 'a large organic molecule' the correct choice.

Explanation Slide...

Wool is a natural polymer made from proteins, while polystyrene, nylon, and PVC are synthetic polymers. Therefore, wool is the correct answer as it is derived from natural sources.

Multiple Choice

Which of the following is a natural polymer?

• Polystyrene

• Wool

• Nylon

• Polyvinyl Chloride (PVC)

Explanation Slide...

The process used to form polymers from monomers is called polymerisation. This involves the chemical reaction where monomers join together to create long chains, forming polymers.

Multiple Choice

What process is used to form polymers from monomers?

• Polymerisation

• Sublimation

• Evaporation

• Condensation

Multiple Choice

Which of the following is a synthetic polymer?

• Natural Rubber

• Silk

• Wool

• Nylon

Explanation Slide...

The monomer for poly(ethene) is ethene, which is a simple alkene with the formula C2H4. It polymerizes to form poly(ethene), commonly known as polyethylene.

Multiple Choice

What is the monomer for poly(ethene)?

• Hexene

• Ethene

• Butene

• Propene

Multiple Choice

What is the main characteristic of addition polymerisation?

• It requires heat

• It involves unsaturated monomers

• It involves saturated monomers

• It loses atoms during the process

Explanation Slide...

The main characteristic of addition polymerisation is that it involves unsaturated monomers, which have double that can react to form long polymer chains. This distinguishes it from processes involving saturated monomers.

Multiple Choice

Which one of these could polymerise to make poly(propene)

Multiple Choice

What monomer forms this polymer chain?

Multiple Choice

What is a key property of plastics?

• They are heavy

• They are expensive to produce

• They are biodegradable

• They are durable and resistant to decay

Explanation Slide...

A key property of plastics is their durability and resistance to decay, making them suitable for various applications. Unlike the other options, which are not true for most plastics, this characteristic is widely recognized.

Multiple Choice

What happens to plastics in landfills?

• They evaporate

• They decompose quickly

• They do not decompose

• They turn into soil

Explanation Slide...

Plastics in landfills do not decompose due to their durable nature. Unlike organic materials, they can take hundreds to thousands of years to break down, leading to long-term environmental concerns.

Multiple Choice

What is a consequence of plastic pollution in water?

• It helps marine life

• It clogs rivers and drains

• It purifies water

• It increases fish population

Explanation Slide...

Plastic pollution in water can clog rivers and drains, leading to flooding and disrupting aquatic ecosystems. This is a significant environmental issue, unlike the other options which suggest positive effects.

Multiple Choice

What is one method of recycling plastics?

• Burning

• Mechanical recycling

• Burying

• Throwing away

Explanation Slide...

Mechanical recycling is a method where plastics are physically processed and reformed into new products, making it an effective way to recycle plastics. Other options like burning and burying do not recycle but rather dispose of waste.

Multiple Choice

What is the chemical method of recycling plastics?

• Melting plastics into pellets

• Converting plastics into raw materials

• Incinerating plastics

• Burying plastics

Explanation Slide...

The chemical method of recycling plastics involves converting them into raw materials, which can then be used to produce new plastic products. This process differs from melting or incinerating, which do not recover raw materials.

Multiple Choice

What is the first step in the physical recycling method?

• Melting plastics

• Sorting plastics

• Burying plastics

• Throwing away plastics

Explanation Slide...

The first step in physical recycling is sorting plastics. This process involves categorizing different types of plastics to ensure they are processed correctly, which is essential for effective recycling.

Multiple Choice

What is the main focus of recycling programs?

• To create more plastic products

• To ignore plastic waste

• To reduce waste and promote recycling

• To increase plastic production

Explanation Slide...

The main focus of recycling programs is to reduce waste and promote recycling, which helps conserve resources and minimize environmental impact, rather than increasing plastic production or ignoring plastic waste.

Multiple Choice

What is one way to address issues related to recycling plastics?

• Reduce recycling programs

• Ignore the problem

• Implement strict laws

• Increase plastic production

Explanation Slide...

Implementing strict laws can help regulate plastic production and waste management, ensuring better recycling practices and reducing environmental impact. This approach addresses the recycling issue effectively.

Multiple Choice

What is the impact of incinerating plastics?

• It produces clean energy

• It helps in recycling

• It reduces waste

• It creates harmful gases

Explanation Slide...

Incinerating plastics can release harmful gases, such as dioxins and furans, which pose serious health risks and environmental concerns. While it may reduce waste, the negative impact on air quality is significant.

Multiple Choice

What is the purpose of polymerisation?

• To break down polymers

• To form large molecules from small ones

• To create monomers

• To reduce waste

Explanation Slide...

The purpose of polymerisation is to form large molecules from small ones, known as monomers. This process creates complex structures essential for various materials, unlike breaking down polymers or creating monomers.

Multiple Choice

What is a major environmental issue with plastics?

• They are too cheap

• They are easy to recycle

• They are biodegradable

• They produce poisonous gases when burned

Explanation Slide...

A major environmental issue with plastics is that they produce poisonous gases when burned, which can harm air quality and human health. This highlights the dangers of improper disposal and incineration of plastic waste.

Multiple Choice

What is a social issue related to recycling plastics?

• Lack of awareness about recycling

• High cost of recycling

• Government regulations

• Environmental damage

Explanation Slide...

Lack of awareness about recycling is a significant social issue, as many people do not understand how to recycle properly or the benefits of recycling plastics, leading to lower participation rates and increased waste.

Multiple Choice

What is the chemical method of recycling plastics?

• Melting plastics into pellets

• Converting plastics into raw materials

• Incinerating plastics

• Burying plastics

Explanation Slide...

The chemical method of recycling plastics involves converting them into raw materials, which can then be used to produce new plastic products. This process differs from melting or incinerating, which do not recover raw materials.

Multiple Choice

What is one method of recycling plastics?

• Burning

• Mechanical recycling

• Burying

• Throwing away

Explanation Slide...

Mechanical recycling is a method where plastics are physically processed and reformed into new products, making it an effective way to recycle plastics. Other options like burning and burying do not recycle but rather dispose of waste.

Multiple Choice

What is a consequence of plastic waste in landfills?

• It decomposes quickly

• It is recycled easily

• It helps the environment

• It leads to built-up waste

Explanation Slide...

Plastic waste in landfills does not decompose quickly, leading to a significant build-up of waste over time. This accumulation can cause environmental issues, making 'It leads to built-up waste' the correct consequence.