<P> Aqua regia ( / ˈreɪɡiə , ˈriːdʒiə / ; from Latin , lit . `` royal water '' or `` king 's water '' ) is a mixture of nitric acid and hydrochloric acid , optimally in a molar ratio of 1 : 3 . Aqua regia is a yellow - orange fuming liquid , so named by alchemists because it can dissolve the noble metals gold and platinum , though not all metals . </P>
<P> Aqua regia ( / ˈreɪɡiə , ˈriːdʒiə / ; from Latin , lit . `` royal water '' or `` king 's water '' ) is a mixture of nitric acid and hydrochloric acid , optimally in a molar ratio of 1 : 3 . Aqua regia is a yellow - orange fuming liquid , so named by alchemists because it can dissolve the noble metals gold and platinum , though not all metals . </P>
name the metals which are soluble only in aqua regia
name the metals which are soluble only in aqua regia
gold platinum
gold platinum