Question

Which of the following reactions are redox reactions?

Check all that apply.

$$ \begin{array}{l} \mathrm{Mg}(\mathrm{s})+\mathrm{Br}_{2}(\mathrm{l}) \rightarrow \mathrm{MgBr}_{2}(\mathrm{~s}) \\ \mathrm{Al}(\mathrm{s})+3 \mathrm{Ag}^{+}(\mathrm{aq}) \rightarrow \mathrm{Al}^{3+}(\mathrm{aq})+3 \mathrm{Ag}(\mathrm{s}) \\ 4 \mathrm{~K}(\mathrm{~s})+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow 2 \mathrm{~K}_{2} \mathrm{O}(\mathrm{s}) \\ \mathrm{SO}_{3}(\mathrm{~g})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{H}_{2} \mathrm{SO}_{4}(\mathrm{aq}) \end{array} $$

Answer 1

and it is reduction Reaction called Redox Reaction A oxidation is commonly oxidation ! 1 Increases it is called oxidation Number oxidation. e Reduction. Decrease it is called Number oxidation Reduction Red? . + Broco +2 - Mg Brcs 19. Oxien a This and is Br Redox change Reaction because oxidation Number. Mg Reduction +3 to 3 A9 -Lag al +3A9c5 L oriano This Al and is a Redox Ag change Reaction because oxidation Number

Reduction +1 -2 O2(g) ako sa 4K co + oxidt - This Because Number. is K a and Redox o Reaction change oxidation No change oxion No. +6-2 +1 .2 S tlt 6-2 903 egg + H₂O e HasO4 (aa. - No change oxida Number This is not Redox Reaction Because so, H does not change oxidn Numbera