What is aqua-regia? Name two special metals which are insoluble in common reagents but dissolve in aqua-regia.

Aqua-regia is a freshly prepared mixture of one part of concentrated nitric acid and three parts of concentrated hydrochloric acid (ratio 1:3).

Gold and platinum are special metals that are insoluble in common reagents but soluble in aqua-regia
 

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Updated on: 10-Oct-2022

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