Chemistry · 2023
JEE Main · 24 January 2023, Shift 1 · Q52
When Fe_0.93 O is heated in presence of oxygen, it converts to Fe_2 O_3. The number of correct statement/s from the following is ____ A. The…
When $\displaystyle \mathrm{Fe}_{0.93} \mathrm{O}$ is heated in presence of oxygen, it converts to $\displaystyle \mathrm{Fe}_2 \mathrm{O}_3$. The number of correct statement/s from the following is $\displaystyle \_\_\_\_$
A. The equivalent weight of $\displaystyle \mathrm{Fe}_{0.93} \mathrm{O}$ is $\displaystyle \frac{\text{Molecular weight}}{0.79}$
B. The number of moles of $\displaystyle \mathrm{Fe}^{2+}$ and $\displaystyle \mathrm{Fe}^{3+}$ in $\displaystyle 1$ mole of $\displaystyle \mathrm{Fe}_{0.93} \mathrm{O}$ is $\displaystyle 0.79$ and $\displaystyle 0.14$ respectively
C. $\displaystyle \mathrm{Fe}_{0.93} \mathrm{O}$ is metal deficient with lattice comprising of cubic closed packed arrangement of $\displaystyle \mathrm{O}^{2-}$ ions
D. The % composition of $\displaystyle \mathrm{Fe}^{2+}$ and $\displaystyle \mathrm{Fe}^{3+}$ in $\displaystyle \mathrm{Fe}_{0.93} \mathrm{O}$ is $\displaystyle 85 \%$ and $\displaystyle 15 \%$ respectively
Official answer
From NTA’s final answer key for this paper.
4
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JEE Main 2023 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.