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Chemical Resistance of Plastics

A manufacturer plans to construct plastic reagent bottles, some of which will be used for 20% solutions of hydrochloric acid and sodium hydroxide.
Among the following materials, which would be least suitable for this purpose. Enter one letter, corresponding to your selection. .

A
High Density Polyethylene
 B
Polypropylene (isotactic)
 C
Nylon 66
 D
Polystyrene
 E
Poly(ethylene oxide)
Enter your selection here:

Sensitivity to Ozone

Which of the following polymers is most likely to suffer chemical degradation on exposure to atmospheric ozone?
Enter one letter, corresponding to your selection.

A Polyproplyene
B Natural Rubber
C Poly(vinyl chloride)
D Teflon
E Polyacrylonitrile

Enter your selection here:

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