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Metals and Non-Metals — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals2 Marks
Question
Name the reagent which is able to dissolve gold and platinum.
✓

Answer

"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.

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