The composition of aqua-regia is
ADil.HCl : Conc. $\mathrm{HNO}_3$ 3 : 1
BConc.HCl : Conc. $\mathrm{HNO}_3$ 3 : 1
CConc.HCl : Dil. $\mathrm{HNO}_3$ 3 : 1
DDil.HCl : Dil. $\mathrm{HNO}_3$ 3 : 1
Answer & Solution
Correct answer: B. Conc.HCl : Conc. $\mathrm{HNO}_3$ 3 : 1
This Metals and Non-metals item tests a core Chemistry concept.
Correct answer: Conc.HCl : Conc. $\mathrm{HNO}_3$ 3 : 1.
_Source: NCERT Exemplar Science Class 10 (NCERT)_
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