The composition of aqua-regia is x parts...

The composition of aqua-regia is x parts of conc. HCl and y parts of conc. `HNO_(3)`. The value of x + y is

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To solve the question regarding the composition of aqua regia, we need to determine the values of x and y, where x represents the parts of concentrated hydrochloric acid (HCl) and y represents the parts of concentrated nitric acid (HNO3). ### Step-by-Step Solution: 1. **Understanding Aqua Regia Composition**: Aqua regia is a mixture of hydrochloric acid (HCl) and nitric acid (HNO3) in a specific ratio. The commonly accepted ratio is 3 parts HCl to 1 part HNO3. 2. **Identifying x and y**: ...

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Pb + Conc. HNO_(3) gives

`Pb(NO_(3))_(2)+NO_(2)`

`PbNO_(3)+NO`

`Pb(NO_(3))_(4)+NO_(3)`

`Pb(NO_(3))_(3)+N_(2)O`

Aqua-regia contains conc. HCl and conc. HNO_3 in the ratio of

`1:3`

`3:1`

`1:3`

`1:5`

When three parts of cone. HCl and one part of cone. HNO_(3) is mixed, a compound 'X' is formed. The correct option related to 'X' is

'X' is known as aqua-regia

'X' is used for dissolving gold

'X' is used for decomposition of salts of weaker acids

both (a) and (b).