MCQ
Conc. $H_2SO_4$ cannot be used to prepare $HBr$ from $NaBr$ because it
- Areacts slowly with $NaBr$
- Boxidises $HBr$
- Creduces $HBr$
- ✓disproportionates $HBr$
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$4Fe + 3{O_2}\, \to \,4F{e^{3 + }} + 6{O^{2 - }}$
Which one of the following statement is incorrect
