KCET · Chemistry · Chemical Bonding and Molecular Structure
The order of stability of metal oxides is
- A \(\mathrm{Al}_{2} \mathrm{O}_{3} < \mathrm{MgO} < \mathrm{Fe}_{2} \mathrm{O}_{3} < \mathrm{Cr}_{2} \mathrm{O}_{3}\)
- B \(\mathrm{Cr}_{2} \mathrm{O}_{3} < \mathrm{MgO} < \mathrm{Al}_{2} \mathrm{O}_{3} < \mathrm{Fe}_{2} \mathrm{O}_{3}\)
- C \(\mathrm{Fe}_{2} \mathrm{O}_{3} < \mathrm{Cr}_{2} \mathrm{O}_{3} < \mathrm{Al}_{2} \mathrm{O}_{3} < \mathrm{MgO}\)
- D \(\mathrm{Fe}_{2} \mathrm{O}_{3} < \mathrm{Al}_{2} \mathrm{O}_{3} < \mathrm{Cr}_{2} \mathrm{O}_{3} < \mathrm{MgO}\)
Answer & Solution
Correct Answer
(C) \(\mathrm{Fe}_{2} \mathrm{O}_{3} < \mathrm{Cr}_{2} \mathrm{O}_{3} < \mathrm{Al}_{2} \mathrm{O}_{3} < \mathrm{MgO}\)
Step-by-step Solution
Detailed explanation
The order of stability of metal oxides is as:
\[
\mathrm{Fe}_{2} \mathrm{O}_{3} < \mathrm{Cr}_{2} \mathrm{O}_{3} < \mathrm{Al}_{2} \mathrm{O}_{3} < \mathrm{MgO}
\]
\[
\mathrm{Fe}_{2} \mathrm{O}_{3} < \mathrm{Cr}_{2} \mathrm{O}_{3} < \mathrm{Al}_{2} \mathrm{O}_{3} < \mathrm{MgO}
\]
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