Polymer

Which type of substance is a synthetic polymer?

• protein

• cellulose

• perspex

• isoprene

Tags

NGSS.MS-PS1-3

What should be done to natural rubber to produce tyres that are harder and more heat resistant?

• heat with sulphur

• add iron wire

• add ammonia solution

• add ethanoic acid

Tags

NGSS.HS-PS1-4

Which polymer can be used to replace glass in an industry?

• perspex

• Bakelite

• neoprene

• thoikol

What is the process?

• Vulcanization

• Sublimation

• Distillation

• Depolymerization

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

NGSS.HS-PS3-4

Which of the following polymers is known for its high tensile strength?

• Polyvinyl chloride (PVC)

• Polyethylene

• Nylon

• Polystyrene

What is the significance of the glass transition temperature in polymers?

• It is the temperature at which polymers decompose.

• It is the temperature at which polymers become electrically conductive.

• It is the temperature at which polymers transition from a hard and relatively brittle state to a viscous or rubbery state.

• It is the temperature at which polymers dissolve in water.

Tags

NGSS.MS-PS1-4

What is polymerization?

• The process of breaking down polymer chains

• The process of recycling plastics

• The process of forming polymer chains from monomers

• The process of melting polymers into new shapes

Which of the following is a characteristic feature of polystyrene?

• High flexibility

• Low thermal conductivity

• High electrical conductivity

• Solubility in water

Which of the following is NOT a property of thermoplastics?

• They can be recycled.

• They can be remolded and reshaped.

• They cannot be melted.

• They are used in making bottles and containers.

These plastics have a permanent shape after curing due to the crosslinks in the polymer structure.

• Thermoplastics

• Thermoset Plastics

• Recyclable Plastics