Aqua Regia

Q. Aqua regia is a mixture of

1. 2 parts of concentrated $HCl$ and 1 part of concentrated $HN{O}_3$
2. 3 parts of concentrated $HCl$ and 1 part of concentrated $HN{O}_3$
3. 3 parts of concentrated $HCl$ and 2 part of concentrated $HN{O}_3$
4. 3 parts of concentrated $H_{2}S{O}_4$ and 2 part of concentrated $HN{O}_3$

Q. When mercury is heated with aqua regia then which compound is formed?

1. $Hg(N{O}_3{)}_2$
2. $HgC{l}_2$
3. $Hg(N{O}_2{)}_2$
4. $H{g}_{2}C{l}_2$

Q. Aqua regia is used to dissolve noble metals such as Pt(Platinum) and Au(Gold).

1. False
2. True

Q. Gold dissolves in aqua regia to give:

1. $H\left[AuC{l}_4\right]$
2. $AuN{O}_3$
3. $H_2\left[AuC{l}_6\right]$
4. $Au(N{O}_3{)}_3$

Q. With reference to aqua regia, choose the correct option(s)

1. The yellow colour of aqua regia is due to the presence of NOCl and $C{l}_2$
2. Aqua regia is prepared by mixing conc. HCl and conc. $HN{O}_3$ in 3 : 1 (v/v) ratio
3. Reaction of gold with aqua regia produces an anion having Au in +3 oxidation state
4. Reaction of gold with aqua regia produces $N{O}_2$ in the absence of air

Q. Aqua regia is a mixture of:

1. 3 parts of concentrated $HCl$ and 2 part of concentrated $HN{O}_3$
2. 2 parts of concentrated $HCl$ and 1 part of concentrated $HN{O}_3$
3. 3 parts of concentrated $HCl$ and 1 part of concentrated $HN{O}_3$
4. 3 parts of concentrated $H_{2}S{O}_4$ and 2 part of concentrated $HN{O}_3$

Q. With reference to aqua regia, choose the correct option(s)

1. The yellow colour of aqua regia is due to the presence of NOCl and $C{l}_2$
2. Aqua regia is prepared by mixing conc. HCl and conc. $HN{O}_3$ in 3 : 1 (v/v) ratio
3. Reaction of gold with aqua regia produces an anion having Au in +3 oxidation state
4. Reaction of gold with aqua regia produces $N{O}_2$ in the absence of air