BaCl2 solution gives a white precipitate with a solution of a salt, which dissolves in dilute hydrochloric acid with the evolution of colourless, pungent smelling gas. The gas as well as the salt, both, are used as bleaching agent in textile companies. The salt contains:
1. Sulphite
2. Sulphide
3. Acetate
4. Carbonate
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1. \(Cu^{2+}\) ions and \([Fe(CN)_6]^{3-}\)
2. \(Cu^{2+}\) ions and \([Fe(CN)_6]^{4-}\)
3. \(Fe^{2+}\) ions and \([Fe(CN)_6]^{4-}\)
4. \(Fe^{2+}\) ions and dimethylglyoxime
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Subtopic: Detection of Cations |
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Pink colour of acidified \(KMnO_4\) is decolourised but there is no evolution of any gas. This may happen with the compound containing the following acid radical (s):
1.
\(SO^{2-}_3\)
2.
\(NO^{-}_2\)
3.
\(S^{2-}\)
4.
All of the above
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1. \(Fe^{2+}\) ions give a dark blue precipitate with potassium hexacyanidoferrate (III) solution.
2. \(Fe^{3+}\) ions give intense blue precipitate with potassium hexacyanidoferrate (II) solution.
3. \(Fe^{3+}\) ions give a brown colouration with potassium hexacyanidoferrate (III) solution.
4. \(Fe^{2+}\) ions give a deep red colouration with ammonium thiocyanate.
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Salt (A), when heated, releases a colorless neutral gas that supports combustion. Based on the diagram provided, it can be concluded that compound (A) contains the following acid radical:
1.
\(\mathrm{NO}_2^{-} \)
2.
\(\mathrm{NO}_3^{-} \)
3.
\(\mathrm{Br}^ - \)
4.
\(\mathrm{SO}_3{ }^{2-}\)
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Salt (A) on heating gives a colourless neutral gas that supports combustion. It can be concluded, based on the diagram given above that the correct statement(s) among the following is/are:
1. Salt (A) gives a yellow precipitate with chloroplatinic acid as well as with sodium cobaltinitrite.
2. The brown ring is formed due to the formation of nitroso ferrous sulphate \([\mathrm{Fe}(\mathrm{NO})]^{2+} \mathrm{SO}_4^{-}\)
3. Salt ‘C’ reacts with silver nitrate solution to form a white precipitate.
4. (A) and (B) both.
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