Difficulty: Medium
Correct Answer: All the above
Explanation:
Introduction / Context:
Styrenic polymers (e.g., polystyrene, high-impact polystyrene, ABS blends) are widely used in interiors, appliances, and packaging. This question checks your understanding of their source, typical properties, and general performance in everyday chemical environments.
Given Data / Assumptions:
Concept / Approach:
Styrene is derived industrially from ethylbenzene (benzene + ethylene from petroleum). Polystyrene has low density, enabling light components. Optical grades are transparent and can transmit visible and some UV (though yellowing/UV degradation can occur without stabilizers). For domestic use, many styrenics resist water, salts, and mild acids/bases, making them suitable for certain utensils and containers, while they are not resistant to aromatic solvents or strong chemicals.
Step-by-Step Solution:
Verification / Alternative check:
Material datasheets show density ~1.04–1.06 g/cm^3, optical clarity, and compatibility charts for typical reagents.
Why Other Options Are Wrong:
Each individual statement is true; picking fewer than all ignores other correct attributes. Caveat: resistance is not universal—context matters.
Common Pitfalls:
Assuming universal chemical inertness; polystyrene is attacked by hydrocarbons like toluene and gasoline.
Final Answer:
All the above
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