Question

White gold is used in jewellery and contains two elements, gold and palladium. A jeweller has two different samples that are both identical in appearance and have a uniform composition throughout. What can be said about the samples?

• A. The samples have variable compositions and are classified as metallic solutions.
• B. The samples are heterogeneous mixtures that can be separated using magnetic properties.
• C. They are homogeneous mixtures and be classified as metallic alloys.
• D. The materials are heterogeneous mixtures and can be classified by their components.

Answer 1

The correct option is C

They are homogeneous mixtures and be classified as metallic alloys.

As they have uniform composition throughout they are considered a homogeneous mixture. Both samples are mixtures of two metals, gold and palladium. Hence, they are also alloys.