Question

what do you mean by aqua regia​

Answer 1

Answer:

it is an acid made by mixing HCl and HNO3. It is so hard and corrosive that it can react with gold

Answer 2

Answer:

Aqua regia is a mixture of nitric acid and hydrochloric acid, at a molar ratio of 1:3 optimally

Aqua regia, mixture of concentrated nitric and hydrochloric acids, usually one part of the former to three parts of the latter by volume.

The formula of aqua regia;HNO₃+3 HCl

It is commonly used to remove noble metals such as gold, platinum and palladium from substrates, particularly in microfabrications and microelectronics labs.