Which of the following statement$(s)$ is(are) correct with reference to the ferrous and ferric ions?
- A$Fe^{3+}$ gives brown colour with potassium ferricyanide
- B$Fe^{2+}$ gives blue precipitate with potassium ferricyanide
- C$Fe^{3+}$ gives red colour with potassium thiocyanate
- DBoth $(b)$ and $(c)$
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Match the List-$I$ with List-$II$ :
Cations Group reaction $P \rightarrow Pb^{2+}, Cu^{2+}$ $(i)$ $H_2S$ gas in presence of dilute $HCl$ $Q \rightarrow Al^{3+}, Fe^{3+}$ $(ii)$ $(NH_4)_2CO_3$ in presence of $NH_4OH$ $R \rightarrow Co^{2+}, Ni^{2+}$ $(iii)$ $NH_4OH$ in presence of $NH_4Cl$ $S \rightarrow Ba^{2+}, Ca^{2+}$ $(iv)$ $H_2S$ in presence of $NH_4OH$
| Cations | Group reaction |
| $P \rightarrow Pb^{2+}, Cu^{2+}$ | $(i)$ $H_2S$ gas in presence of dilute $HCl$ |
| $Q \rightarrow Al^{3+}, Fe^{3+}$ | $(ii)$ $(NH_4)_2CO_3$ in presence of $NH_4OH$ |
| $R \rightarrow Co^{2+}, Ni^{2+}$ | $(iii)$ $NH_4OH$ in presence of $NH_4Cl$ |
| $S \rightarrow Ba^{2+}, Ca^{2+}$ | $(iv)$ $H_2S$ in presence of $NH_4OH$ |
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:
Medium
View SolutionThe reagent used for the identification of $Ni^{2+}$ ions is .....
Difficult
View Solution$A$ salt reacts with dilute $HCl$ to produce a gas with a pungent smell and yellow crystals. When tested,the salt gives a green flame. With potassium chromate,the salt gives yellow crystals. Therefore,the salt is.......
Medium
View SolutionReagents used for the qualitative estimation of $Ni^{+2}$ and $Cu^{+2}$ respectively are:
Medium
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