Find the FALSE Combination of a Metallurgical Process and Its

question 49

Multiple Choice

Find the FALSE combination of a metallurgical process and its example:

• A)leaching: 4 Au(s)+ 8 CN^-(aq)+ O₂(g)+ 2 H₂O(l)→ 4 [Au(C
• N)₂]^-(aq)+ 4 OH^-(aq)
• B)reduction: ZnCO₃(s)→ ZnO(s)+ CO₂(g)
• C)roasting: 2 Cu₂S(s)+ 3 O₂(g)→ 2 Cu₂O(s)+ 2 SO₂(g)
• D)precipitation: Zn²⁺(aq)+ S^2-(aq)→ ZnS(s)
• E)conversion: 2 Co(O
• H)₃(s) Co₂O₃(s)+ 3 H₂O(g)

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Definitions:

Direct Material

The raw materials that are used directly in manufacturing a product and can be easily traced to the final product.

Factory Overhead

Indirect costs incurred during the manufacturing process, not including direct materials or direct labor.

Materials

Raw inputs or supplies used in the manufacturing process to produce goods or are consumed during the service delivery.

Labor

The human effort, both physical and mental, used in the production of goods and services.