রাজঅম্ল বলা হয়-
ক
1:3 mixture of conc. HCl and conc. HNO3
খ
1:3 mixture of conc. HNO3 and conc. HCl
গ
1:3 mixture of conc. HNO3 and conc. H2SO4
ঘ
1:3 mixture of conc. H2SO4 and conc. HNO3
সঠিক উত্তর: 1:3 mixture of conc. HNO3 and conc. HCl