Question

Aqua regia is a mixture of ________ and _________ in _________ ratio.

Answer 1

Aqua regia ("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.