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Question:
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In the following reactions, identify $P, Q$ and $R$, respectively
$\text { I. } 3 \mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \longrightarrow 2 \mathrm{P}+\mathrm{CO}_2 \uparrow$
II. $\mathrm{Fe}_3 \mathrm{O}_4+4 \mathrm{CO} \longrightarrow 3 Q+4 \mathrm{CO}_2 \uparrow$
III. $\mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \longrightarrow 2 R+\mathrm{CO}_2 \uparrow$
Options:
$\text { I. } 3 \mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \longrightarrow 2 \mathrm{P}+\mathrm{CO}_2 \uparrow$
II. $\mathrm{Fe}_3 \mathrm{O}_4+4 \mathrm{CO} \longrightarrow 3 Q+4 \mathrm{CO}_2 \uparrow$
III. $\mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \longrightarrow 2 R+\mathrm{CO}_2 \uparrow$
Solution:
2927 Upvotes
Verified Answer
The correct answer is:
$\begin{array}{lll}\mathbf{P} & \mathbf{Q} & \mathbf{R} \\ \mathrm{Fe}_3 \mathrm{O}_4 & \mathrm{Fe} & \mathrm{FeO}\end{array}$
Among the given equations, option (c) will give the required answer, i.e.,
$(P)=\mathrm{Fe}_3 \mathrm{O}_4,(Q)=\mathrm{Fe},(R)=\mathrm{FeO} \text {, i.e. }$
I. $3 \mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \longrightarrow 2 \mathrm{Fe}_3 \mathrm{O}_4+\mathrm{CO}_2$
II. $\mathrm{Fe}_3 \mathrm{O}_4+4 \mathrm{CO} \longrightarrow 3 \mathrm{Fe}+4 \mathrm{CO}_2$
III. $\mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \longrightarrow 2 \mathrm{FeO}+\mathrm{CO}_2$
$(P)=\mathrm{Fe}_3 \mathrm{O}_4,(Q)=\mathrm{Fe},(R)=\mathrm{FeO} \text {, i.e. }$
I. $3 \mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \longrightarrow 2 \mathrm{Fe}_3 \mathrm{O}_4+\mathrm{CO}_2$
II. $\mathrm{Fe}_3 \mathrm{O}_4+4 \mathrm{CO} \longrightarrow 3 \mathrm{Fe}+4 \mathrm{CO}_2$
III. $\mathrm{Fe}_2 \mathrm{O}_3+\mathrm{CO} \longrightarrow 2 \mathrm{FeO}+\mathrm{CO}_2$
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