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

Options

A. 'X' is known as aqua-regia
B. 'X' is used for dissolving gold
C. 'X' is used for decomposition of salts of weaker acids
D. both (a) and (b).

Answer

D

Explanation

`3HCl_("(conc.)")+HNO_(3"(conc.)")rarrunderset("Aqua regia")underset("(X)")(HNO_(3) cdot 3HCl)`
Aqua regia is used for dissolving noble metals like gold, platinum. HCl decomposes salts of weaker acids e.g., carbonates, hydrogen carbonates, sulphites, etc.