Aqua regia is a mixture of $c o n c . H N O_{3}$ and $c o n c . H C l$ in the ratio .

1:3

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3:1

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2:3

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Solution

The correct option is A 1:3
Aqua regia is a mixture of $c o n c . H N O_{3}$ and $c o n c . H C l$ in the ratio 1:3. Aqua regia dissolves noble metals like gold, platinum, etc and is hence used in metallurgical processes.

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