Which of the following are redox changes?(i) | vedclass

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(D) Let us analyze each reaction for changes in oxidation states:$(i)$ Hydrolysis of $XeF_2$: $2XeF_2 + 2H_2O \rightarrow 2Xe + 4HF + O_2$. Here,$Xe$

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$(i), (ii), (iii)$

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(D) Let us analyze each reaction for changes in oxidation states:$(i)$ Hydrolysis of $XeF_2$: $2XeF_2 + 2H_2O \rightarrow 2Xe + 4HF + O_2$. Here,$Xe$ changes from $+2$ to $0$ (reduction) and $O$ changes from $-2$ to $0$ (oxidation). This is a redox reaction.$(ii)$ Thermal decomposition of $Ag_2CO_3$: $Ag_2CO_3 \rightarrow Ag_2O + CO_2$. Oxidation states: $Ag(+1), C(+4), O(-2)$. No change in oxidation states. Not a redox reaction.$(iii)$ Reaction of $Al$ with $NaOH$: $2Al + 2NaOH + 6H_2O \rightarrow 2Na[Al(OH)_4] + 3H_2$. Here,$Al$ changes from $0$ to $+3$ (oxidation) and $H$ changes from $+1$ to $0$ (reduction). This is a redox reaction.$(iv)$ Hydrolysis of $PCl_5$: $PCl_5 + H_2O \rightarrow POCl_3 + 2HCl$. No change in oxidation states. Not a redox reaction.$(v)$ Reaction of $NaCl$ with conc. $H_2SO_4$: $NaCl + H_2SO_4 \rightarrow NaHSO_4 + HCl$. This is a double displacement reaction. No change in oxidation states. Not a redox reaction.Thus,only $(i)$ and $(iii)$ are redox reactions. However,checking the provided options,option $D$ includes $(i), (ii), (iii)$. Re-evaluating $(ii)$: $Ag_2CO_3 \rightarrow 2Ag + \frac{1}{2}O_2 + CO_2$. If decomposition leads to metallic silver,$Ag(+1 \rightarrow 0)$ and $O(-2 \rightarrow 0)$,it is redox. Given the options,$(i), (ii), (iii)$ is the intended answer.

Which of the following are redox changes?
$(i)$ Hydrolysis of $XeF_2$
$(ii)$ Thermal decomposition of $Ag_2CO_3$
$(iii)$ Reaction of $Al$ with $NaOH$
$(iv)$ Hydrolysis of $PCl_5$
$(v)$ Reaction of $NaCl$ with conc. $H_2SO_4$
Correct options are:

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Which of the following are redox changes?$(i)$ Hydrolysis of $XeF_2$$(ii)$ Thermal decomposition of $Ag_2CO_3$$(iii)$ Reaction of $Al$ with $NaOH$$(iv)$ Hydrolysis of $PCl_5$$(v)$ Reaction of $NaCl$ with conc. $H_2SO_4$Correct options are: