A) addition of\[N{{H}_{4}}OH\]in presence of\[N{{H}_{4}}Cl\]when only\[Fe{{(OH)}_{3}}\]is precipitated
B) addition of\[N{{H}_{4}}OH\]in presence of\[N{{H}_{4}}Cl\]when\[Cr{{(OH)}_{3}}\]and\[Fe{{(OH)}_{3}}\]both are precipitated and on adding\[B{{r}_{2}}\]water and \[NaOH,Cr{{(OH)}_{3}}\]dissolves
C) precipitate of\[Cr{{(OH)}_{3}}\]and\[Fe{{(OH)}_{3}}\]as obtained in are treated! with cone.\[HCl\] when only\[Fe{{(OH)}_{3}}\]dissolves
D) and (b) the (c) correct.
Correct Answer: B
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