2019 · Q56
If formula of sodium salt of an anion X is Na2X, then the formula of its aluminium salt would be
general-sciencechemistry
- AAlX
- BAlX3
- CAl2X3
- DAl3X2
Explanation
In Na2X the anion X carries a 2- charge (balanced by two Na+). Aluminium is Al3+, so two Al3+ (+6) balance three X2- (-6), giving Al2X3. Hence C.