Which of the following are combination reacti | vedclass

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(B) combination reaction is a reaction in which two or more reactants combine to form a single product.$(i)$ $2 KClO_{3} \longrightarrow 2 KCl + 3O_{2

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$(ii)$ and $(iii)$

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(B) combination reaction is a reaction in which two or more reactants combine to form a single product.$(i)$ $2 KClO_{3} \longrightarrow 2 KCl + 3O_{2}$ is a decomposition reaction because one reactant breaks down into multiple products.$(ii)$ $MgO + H_{2}O \longrightarrow Mg(OH)_{2}$ is a combination reaction because two reactants combine to form a single product.$(iii)$ $4 Al + 3O_{2} \longrightarrow 2 Al_{2}O_{3}$ is a combination reaction because two reactants combine to form a single product.$(iv)$ $Zn + FeSO_{4} \longrightarrow ZnSO_{4} + Fe$ is a displacement reaction because $Zn$ displaces $Fe$ from its salt solution.Therefore,$(ii)$ and $(iii)$ are combination reactions.

Which of the following are combination reactions?
$(i)$ $2 KClO_{3} \xrightarrow{\text{Heat}} 2 KCl + 3O_{2}$
$(ii)$ $MgO + H_{2}O \longrightarrow Mg(OH)_{2}$
$(iii)$ $4 Al + 3O_{2} \longrightarrow 2 Al_{2}O_{3}$
$(iv)$ $Zn + FeSO_{4} \longrightarrow ZnSO_{4} + Fe$

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Which of the following are combination reactions?$(i)$ $2 KClO_{3} \xrightarrow{\text{Heat}} 2 KCl + 3O_{2}$$(ii)$ $MgO + H_{2}O \longrightarrow Mg(OH)_{2}$$(iii)$ $4 Al + 3O_{2} \longrightarrow 2 Al_{2}O_{3}$$(iv)$ $Zn + FeSO_{4} \longrightarrow ZnSO_{4} + Fe$