CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Plastics
Which principle is most directly promoted by reducing single-use plastics?
A. Burning all plastics in open air
B. Increasing unnecessary packaging
C. Waste prevention at the source
D. Mixing hazardous waste with food
Correct Answer: C
Reducing consumption prevents waste generation before reuse or recycling is needed.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Plastics
Which plastic is commonly used for beverage bottles?
A. Kevlar only
B. Natural rubber only
C. Bakelite only
D. PET
Correct Answer: D
PET is widely used for beverage and water bottles.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Plastics
Which recycling symbol identifies PET plastic in common resin codes?
A. 5
B. 2
C. 1
D. 7
Correct Answer: C
PET, polyethylene terephthalate, is commonly labeled resin identification code 1.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Plastics
What are microplastics?
A. Only plastic molecules visible as gas
B. Plastic pieces larger than 5 m
C. Very small plastic particles, commonly defined as less than 5 mm
D. Metal particles coated with paint
Correct Answer: C
Microplastics are plastic fragments or particles smaller than about 5 millimeters.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Plastics
What is one major environmental problem associated with many conventional plastics?
A. They persist for long periods because they degrade slowly
B. They evaporate instantly
C. They always improve soil fertility
D. They contain no carbon
Correct Answer: A
Many petroleum-derived plastics are resistant to natural degradation and can accumulate in ecosystems.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Plastics
Polyethylene is commonly produced from which monomer?
A. Ethene (ethylene)
B. Ethanol
C. Ethanoic acid
D. Methane
Correct Answer: A
Ethene molecules undergo addition polymerization to form polyethylene.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Plastics
PVC stands for what?
A. Polyvinyl carbonyl
B. Polyvinyl chloride
C. Primary vinyl carbonate
D. Polyvolatile carbon
Correct Answer: B
PVC is polyvinyl chloride.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Plastics
What is a thermosetting plastic?
A. A gas at room temperature
B. A plastic that always dissolves in water
C. A plastic made only from sugar
D. A plastic that forms a heavily cross-linked structure and does not readily remelt after setting
Correct Answer: D
Thermosets cure into cross-linked networks that resist remelting.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Plastics
What is a thermoplastic?
A. A plastic that can generally be softened by heating and reshaped
B. A metal coated with glass
C. A naturally occurring mineral only
D. A plastic that can never soften
Correct Answer: A
Thermoplastics soften on heating because their polymer chains are not permanently cross-linked into a rigid network.
CSS - PMS - CCE - PCS - General Science
Organic Chemistry - Plastics
Most common plastics are made from large molecules called what?
A. Noble gases
B. Monomers only as final products
C. Ions only
D. Polymers
Correct Answer: D
Plastics are largely polymeric materials consisting of long molecular chains.