Read the following and answer any four questions
Sohan went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was sad but after a futile argument, the man beat a hasty retreat.
The composition of aqua-regia is

Options

A. `"Dil."HCl:" Conc."HNO_(3)3:2`
B. Conc. HCl : Dil. `HNO_(3)3:1`
C. Conc. HCl : Conc. `HNO_(3)3:1`
D. Dil. HCl : Dil `HNO_(3)3:1`

Explanation

**Step-by-Step Solution:**

1. **Understanding Aqua Regia**: Aqua regia is a highly corrosive mixture used to dissolve noble metals like gold and platinum. It is important to know its composition to understand its properties.

2. **Components of Aqua Regia**: Aqua regia is composed of two strong acids:
- Concentrated Hydrochloric Acid (HCl)
- Concentrated Nitric Acid (HNO3)

3. **Ratio of the Components**: The typical ratio of these acids in aqua regia is:
- 3 parts of Concentrated Hydrochloric Acid (HCl)
- 1 part of Concentrated Nitric Acid (HNO3)

4. **Final Composition Statement**: Therefore, the composition of aqua regia can be summarized as:
- Aqua Regia = 3 parts Concentrated HCl + 1 part Concentrated HNO3

**Answer**: The composition of aqua regia is 3 parts Concentrated Hydrochloric Acid (HCl) and 1 part Concentrated Nitric Acid (HNO3).

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