A) 1 : 3
B) 3 : 1
C) 2:3
D) 3:2
Correct Answer: A
Solution :
Aqua-regia is a mixture of cone. \[HN{{O}_{3}}\]and conc. HCl in the ratio 1 : 3. Noble metals like gold and platinum are highly unreactive but react with aqua-regia forming respective chlorides \[\underbrace{HN{{O}_{3}}}_{aquaregia}+3HCl\xrightarrow{{}}\underset{Nitrosyl\,chloride}{\mathop{NOCl}}\,+2{{H}_{2}}O+2Cl\] \[Au+3Cl\xrightarrow{{}}AuC{{l}_{3}}\] \[Pt+4Cl\xrightarrow{{}}PtC{{l}_{4}}\]You need to login to perform this action.
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