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Question

Acids as we know dissolve most of the metals, but its hard dissolve the metals like gold and platinum. Can you name a special mixture of acids which dissolves noble metals like gold?



Correct Answer
A

Aqua Regia

Your Answer
B

Aqua Vitriola

Your Answer
C

Aqua Fortis

Your Answer
D

Aqua Fresca


Solution

The correct option is A

Aqua Regia


Aqua regia is a mixture of concentrated nitric and hydrochloric acids in a ratio of 1:3 that can dissolve noble metals such as gold, platinum and palladium, even though the metals are not soluble in either acid alone. It is a yellow-orange fuming liquid which is often termed as royal water.

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