$A$ group of acidic oxides is

  • A
    $CrO_3, Mn_2O_7$
  • B
    $ZnO, Al_2O_3$
  • C
    $CaO, ZnO$
  • D
    $Na_2O, Al_2O_3$

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Similar Questions

Match the following:
List-$I$List-$II$
$A$. $Co^{2+}$$I$. Yellow colour
$B$. $Fe^{2+}$$II$. Dark green colour
$C$. $Ni^{2+}$$III$. Blue colour
$D$. $Cu^{2+}$$IV$. Pale green colour
$V$. Pink colour

The correct answer is

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Acidified chromic acid $+ H_2O_2 \xrightarrow{\text{Org. solvent}} X + Y$ (blue colour). $X$ and $Y$ are:

An aqueous solution of $FeSO_4$,$Al_2(SO_4)_3$ and chrome alum is heated with excess of $Na_2O_2$ and filtered. The materials obtained are

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