Plastic Properties and Acetone Effects

The video demonstrates the effects of acetone on different types of plastics. Initially, the characteristics of four known plastics (PVC, HDPE, polypropylene, and polystyrene) are observed. Acetone is then applied to these plastics, revealing that it softens polystyrene and PVC but has no effect on HDPE and polypropylene. The experiment is repeated with unknown plastics, showing similar results: acetone softens some plastics while leaving others unchanged.

Which type of plastic is described as very flexible in the initial observation?

• Polyvinyl chloride (PVC)

• Polystyrene

• High-density polyethylene (HDPE)

• Polypropylene

What is the characteristic of polystyrene before the acetone test?

• Fairly flexible

• Very flexible

• Very stiff

• Fairly stiff

After soaking in acetone, which plastic strip became very sticky?

• Polypropylene

• Polystyrene

• Polyvinyl chloride

• High-density polyethylene

Which plastic strip showed no change after the acetone test?

• Polyvinyl chloride

• Polystyrene

• High-density polyethylene

• Polypropylene

What is the initial characteristic of the orange plastic strip?

• Very flexible

• Very stiff

• Fairly flexible

• Fairly stiff

Which unknown plastic strip is described as fairly stiff before the acetone test?

• Black

• White

• Clear

• Orange

After the acetone test, which unknown plastic strip became very sticky?

• White

• Black

• Clear

• Orange

Which unknown plastic strip showed no change after the acetone test?

• Orange

• White

• Clear

• Black

What was the effect of acetone on the black plastic strip?

• It dissolved completely

• It showed no change

• It softened and became more flexible

• It became very sticky

Which plastic strip became more flexible after the acetone test?

• Black

• Clear

• Orange

• White