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Q6.Which of the following cations will show red precipitate with dimethylglyoxime in ammoniacal solution?
2 years ago | [YT] | 7
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Q5.Which of the following sulphides when dissolved in conc. HNO3 will show positive test with ammonium molybdate?
2 years ago | [YT] | 4
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Q4.Which of the following sulphides is soluble in yellow ammonium sulphide?
2 years ago | [YT] | 0
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Q3.Which of the following pairs of compounds are precipitated in different groups in the systematic analysis of cations?
(a) Bi3+, As3+ (b) As3+, Sn2+ (c)Cu2+, Zn2+ (d) Ba2+, Sr2+
2 years ago | [YT] | 3
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Q2.Which of the following salt solution gives white precipitate turning to grey on adding HgCl2 solution?
(a) SnCl2 (b) CuCl2 (c) PbCl2 (d) ZnCO3
2 years ago | [YT] | 3
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Q5.Heating an ammoniacal solution of MgSO4 in the presence of NH4Cl and Na2HPO4 causes the precipitation of
2 years ago | [YT] | 2
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Q4.A colourless aqueous solution on adding water and on heating gave a white precipitate. This precipitate when reacted with NH4Cl and NH4OH in excess resulted in dissolution of some of the precipitate and a gelatinous precipitate is obtained. The hydroxide formed in aqueous solution is
2 years ago | [YT] | 1
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Q3.A metallic nitrate gives black precipitates with KI solution. On adding excess of KI, an orange-coloured solution is obtained. The metallic ion in the metallic nitrate is
2 years ago | [YT] | 2
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Q2.An aqueous solution of a substance gives a white precipitate on treatment with dilute hydrochloric acid, which dissolves on heating. When hydrogen sulfide is passed through the hot acidic solution, a black precipitate is obtained. The substance is a
2 years ago | [YT] | 2
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The only cations present in a slightly acidic solution are Fe3+, Zn2+ and Cu2+. The reagent that when added in excess to this solution would identify and separate Fe3+ in one step is
2 years ago | [YT] | 1
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