Aqua regia is a freshly prepared mixture of concentrated hydrochloric acid and concentrated nitric a...........

Current GK (MTS) General Science

Aqua regia is a freshly prepared mixture of concentrated hydrochloric acid and concentrated nitric acid in the ratio of ______ by

volume.

This questions was previously asked in

SSC MTS 20th July 2022 Shift-1

3 : 1

2 : 1

6 : 1

4 : 1

Let’s break it down:

- Aqua regia is famous for dissolving gold and platinum—stuff that most acids can’t touch.

- It’s always made fresh, because it loses its power if it sits around.

- The classic mix is concentrated hydrochloric acid (HCl) and concentrated nitric acid (HNO3).

- The correct volume ratio is 3 parts HCl to 1 part HNO3.

Now, the options:

- Option 1 (3:1) That’s the right ratio—3 parts hydrochloric to 1 part nitric.

- Option 2 (2:1) Nope, that’s not standard.

- Option 3 (6:1) That’s way too much hydrochloric acid, definitely not used.

- Option 4 (4:1) Also doesn’t match the typical preparation.

So, the answer is Option 1—3:1.

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