The Mineral Cryolite, Na₃AlF₆, Is Used in the Hall Process

question 41

Multiple Choice

The mineral cryolite, Na₃AlF₆, is used in the Hall process for aluminum production as

• A) the source of aluminum (the ore).
• B) a chemical reducing agent.
• C) a material that forms a slag and thus removes impurities.
• D) a solvent for alumina, Al₂O₃.

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Definitions:

Decreasing Cost Industry

An industry where an increase in production leads to a decrease in the average cost of producing each unit, often due to economies of scale.

Marginal Cost

Marginal cost refers to the increase in total cost that arises from producing one additional unit of a good or service.

Block Pricing

A pricing strategy where different quantities of a product or service are sold at different prices, usually implying that larger quantities are sold at a lower per-unit price.

First-Degree Price Discrimination

Practice of charging each customer her reservation price.