Multiple choice

The metals having outstanding catalytic properties are

  1. the alkali metals

  2. the alkaline earth metals

  3. refractory metals

  4. the platinum metals
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D Correct answer
Explanation

The platinum group metals is a term used sometimes to collectively refer to six metallic elements clustered together in the periodic table. These elements are all transition metals.The platinum metals have outstanding catalytic properties. They are highly resistant to wear and tarnish, making platinum, in particular, well suited for fine jewellery. Other distinctive properties include resistance to chemical attack, excellent high-temperature characteristics, and stable electrical properties.

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