1.

Define aquaregia.

Answer»

Solution :METALS like gold and silver are not reactive with either HCl or `HNO_3.` But the mixture of these two acids can dissolve gold. This mixture is called Aquaregia. It is a mixture of hydrochloric acid and NITRIC acid prepared optimally in a molar ratio of 3:1. It is a yellow- orange fuming LIQUID. It is a highly corrosive liquid, ABLE to attack gold and other resistant substances.


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