MCQ
A group of acidic oxide is
- ✓$Cr{O_3},\,\,M{n_2}{O_7}$
- B$ZnO,\,\,A{l_2}{O_3}$
- C$CaO,\,\,ZnO$
- D$N{a_2}O,\,\,A{l_2}{O_3}$
✓
Answer
Correct option: A.
$Cr{O_3},\,\,M{n_2}{O_7}$
a
(a)$Cr{O_3}\,\,{\rm{and}}\,\,M{n_2}{O_7}$ are acidic oxide since they react with water to form acid.
(a)$Cr{O_3}\,\,{\rm{and}}\,\,M{n_2}{O_7}$ are acidic oxide since they react with water to form acid.
$Cr{{O}_{3}}+{{H}_{2}}O\to \underset{\begin{smallmatrix}
\text{Chromic} \\
\text{acid}
\end{smallmatrix}}{\mathop{{{H}_{2}}Cr{{O}_{4}}}}\,$
$M{{n}_{2}}{{O}_{7}}+{{H}_{2}}O\to \underset{\begin{smallmatrix}
\text{Permagnic} \\
\text{acid}
\end{smallmatrix}}{\mathop{2HMn{{O}_{4}}}}\,$
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