(C) When $Na_2O_2$ is added to the mixture,$Fe^{2+}$ is oxidized to $Fe^{3+}$,which precipitates as $Fe(OH)_3$ (brown residue).$Al^{3+}$ forms soluble

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Yellow filtrate and brown residue

(C) When $Na_2O_2$ is added to the mixture,$Fe^{2+}$ is oxidized to $Fe^{3+}$,which precipitates as $Fe(OH)_3$ (brown residue).$Al^{3+}$ forms soluble $[Al(OH)_4]^-$ and $Cr^{3+}$ is oxidized to $CrO_4^{2-}$ (yellow filtrate).Thus,the filtrate is yellow due to the presence of chromate ions,and the residue is brown due to the presence of ferric hydroxide.

Class 12 Chemistry Principles Related to Practical Chemistry Wet Test for Basic Radical

Medium

An aqueous solution containing $FeSO_4$,$Al_2(SO_4)_3$,and chrome alum is treated with $Na_2O_2$ and heated,followed by filtration. The resulting products are:

A
Colorless filtrate and green residue
B
Yellow filtrate and green residue
C
Yellow filtrate and brown residue
D
Green filtrate and brown residue

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Principles Related to Practical Chemistry

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Wet Test for Basic Radical

Identify $A$,$B$ and $C$ in the given reaction sequence.

DifficultJEE MAIN 2025

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Nessler's reagent is used to detect

DifficultAIIMS 2010

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Which of the following compounds will not give a positive chromyl chloride test?

Medium

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Which radicals are precipitated by $(NH_4)_2CO_3$ in the presence of $NH_4OH$ (alkali)?

Medium

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Match column-$I$ and column-$II$ with correct relation:

Column-$I$ Column-$II$

$(i)$ Blood like red colour $(a)$ $Fe_4[Fe(CN)_6]_3$

$(ii)$ Sodium nitroprusside $(b)$ $(NH_4)_2MoO_4$

$(iii)$ Ammonium molybdate $(c)$ $[Fe(SCN)]^{2+}$

$(iv)$ Ferri-ferro cyanide $(d)$ $Na_2[Fe(CN)_5NO]$

Column-$I$	Column-$II$
$(i)$ Blood like red colour	$(a)$ $Fe_4[Fe(CN)_6]_3$
$(ii)$ Sodium nitroprusside	$(b)$ $(NH_4)_2MoO_4$
$(iii)$ Ammonium molybdate	$(c)$ $[Fe(SCN)]^{2+}$
$(iv)$ Ferri-ferro cyanide	$(d)$ $Na_2[Fe(CN)_5NO]$

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An aqueous solution containing $FeSO_4$,$Al_2(SO_4)_3$,and chrome alum is treated with $Na_2O_2$ and heated,followed by filtration. The resulting products are:

Similar Questions

Identify $A$,$B$ and $C$ in the given reaction sequence.

Nessler's reagent is used to detect

Which of the following compounds will not give a positive chromyl chloride test?

Which radicals are precipitated by $(NH_4)_2CO_3$ in the presence of $NH_4OH$ (alkali)?

Match column-$I$ and column-$II$ with correct relation: Column-$I$ Column-$II$ $(i)$ Blood like red colour $(a)$ $Fe_4[Fe(CN)_6]_3$ $(ii)$ Sodium nitroprusside $(b)$ $(NH_4)_2MoO_4$ $(iii)$ Ammonium molybdate $(c)$ $[Fe(SCN)]^{2+}$ $(iv)$ Ferri-ferro cyanide $(d)$ $Na_2[Fe(CN)_5NO]$

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Match column-$I$ and column-$II$ with correct relation:

Column-$I$ Column-$II$

$(i)$ Blood like red colour $(a)$ $Fe_4[Fe(CN)_6]_3$

$(ii)$ Sodium nitroprusside $(b)$ $(NH_4)_2MoO_4$

$(iii)$ Ammonium molybdate $(c)$ $[Fe(SCN)]^{2+}$

$(iv)$ Ferri-ferro cyanide $(d)$ $Na_2[Fe(CN)_5NO]$