MCQ
Thermite is a mixture of iron oxide and:
- ✓Aluminium powder.
- BZinc powder.
- CPotassium metal.
- DSodium metal.
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$BrO_{3(aq)}^ - \, + \,5Br_{(aq)}^ - \, + \,6{H^ - }\, \to \,3B{r_{2(l)}}\, + \,3{H_2}{o_{(l)}}.$
The rate of appearance of bromine $(Br_2)$ is related to rate of disappearance of bromide ions as
$2{X_2}\left( s \right) + 3{Y^{ + 2}}\left( {aq} \right) \to 2X_2^{3 + }\left( {aq} \right) + 3Y\left( s \right)$