Aqua Regia

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

1. False
2. True

Q.

Aqua Regia is a mixture of $3:1$

1. $\mathrm{HCl}:{\mathrm{HNO}}_3$

2. ${\mathrm{HNO}}_3:\mathrm{HCl}$

3. ${\mathrm{H}}_2{\mathrm{SO}}_4:{\mathrm{H}}_2{\mathrm{SO}}_4$

4. ${\mathrm{HNO}}_3:{\mathrm{H}}_2{\mathrm{SO}}_4$