Question

1. which of the following is a precious metal commonly used in jewelry and industrial applications?

a. platinum

b. iron

c. copper

d. aluminium

Explanation:

• Platinum is a precious metal known for its rarity, durability, and use in jewelry (e.g., engagement rings) and industrial applications (e.g., catalytic converters, electronics).
• Iron, copper, and aluminum are not precious metals; iron is a common structural metal, copper is used in wiring, and aluminum is a lightweight metal for various industrial uses but not classified as precious.

Answer:

a. Platinum