Crime busters Plastics, Fiber and Hair

Front

What is the identity of a plastic that sinks in 25% NaCl but floats in saturated NaCl?

Back

PC

Front

What is the identity of a plastic that sinks in saturated NaCl and shows no color when exposed to a flame?

Back

PVC

Front

What is the identity of a plastic that floats in distilled water, sinks in 10% NaCl solution, and dissolves in acetone?

Back

PS

Front

What type of fiber melts near a flame, ignites in the flame, and gives off a sweet scent?

Back

Synthetic

Front

What chemical is necessary for polymerization by condensation?

Back

HCl

Front

What is the density of a plastic that sinks in 25% NaCl?

Back

Greater than 1.2 g/cm³

Front

What is the density of a plastic that floats in distilled water?

Back

Less than 1 g/cm³

Front

What is the primary characteristic of synthetic fibers when exposed to heat?

Back

They melt and may ignite.

Front

What is the significance of acetone in identifying plastics?

Back

It dissolves certain plastics, indicating their identity.

Front

What are the three main types of fibers?

Back

Animal, Vegetable, Synthetic