MCQ
Strongest acid is
- ✓$A{l_2}{O_3}$
- B$MgO$
- C$N{a_2}O$
- D$CaO$
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$FeCr _{2} O _{4}+ Na _{2} CO _{3}+ O _{2} \rightarrow A + Fe _{2} O _{3}+ CO _{2}$
$A + H ^{+} \rightarrow B + H _{2} O + Na ^{+}$