MCQ
Aqua-regia is
- ✓$1 : 3$ conc. $HN{O_3}$ and conc. $HCl$
- B$1 : 2$ conc. $HN{O_3}$ and conc. $HCl$
- C$3 : 1$ conc. $HN{O_3}$ and conc. $HCl$
- D$2 : 1$ conc. $HN{O_3}$ and conc. $HCl$
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$MgO + 2HCl \longrightarrow MgCl_2 + H_2O$
Statement $II :$ there is no change when undergoing boiling
Statement $III :$ reverse of $I$ and $II$
Statement $IV :$ dimer formation in freezing and boiling state