Chemistry · 2025
JEE Main · 24 January 2025, Shift 1 · Q71
Consider the following reaction occurring in the blast furnace: Fe_3 O_4( s ) +4 CO_( g ) → 3 Fe_( l ) +4 CO_2( g ) ' x ' kg of iron is produced when…
Consider the following reaction occurring in the blast furnace:
$$\mathrm{Fe}_3 \mathrm{O}_{4(\mathrm{~s})}+4 \mathrm{CO}_{(\mathrm{g})} \rightarrow 3 \mathrm{Fe}_{(\mathrm{l})}+4 \mathrm{CO}_{2(\mathrm{~g})}
$$
' $\displaystyle x$ ' kg of iron is produced when $\displaystyle 2.32 \times 10^3 \mathrm{~kg} \mathrm{Fe}_3 \mathrm{O}_4$ and $\displaystyle 2.8 \times 10^2 \mathrm{~kg} \mathrm{CO}$ are brought together in the furnace. The value of ' $\displaystyle x$ ' is $\displaystyle \_\_\_\_$. (nearest integer)
{Given:
molar mass of $\displaystyle \mathrm{Fe}_3 \mathrm{O}_4=232 \mathrm{~g} \mathrm{~mol}^{-1}$
molar mass of $\displaystyle \mathrm{CO}=28 \mathrm{~g} \mathrm{~mol}^{-1}$
molar mass of $\displaystyle \left.\mathrm{Fe}=56 \mathrm{~g} \mathrm{~mol}^{-1}\right\}$
Official answer
From NTA’s final answer key for this paper.
420
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JEE Main 2025 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.