- 1(current)
Q. No.A metal solution when treated with dimethyl glyoxime and \(\text{NH}_4\text{OH}\) gives a rose-red complex. The metal is:
1. Ni
2. V
3. Co
4. Mn
1. Ni
2. V
3. Co
4. Mn
Subtopic: Detection of Cations |
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A white precipitate obtained in the analysis of a mixture becomes black on treatment with \(\mathrm{NH_4OH}.\) It may be:
1. \(\mathrm{PbCl_2}\)
2. \(\mathrm{AgCl}\)
3. \(\mathrm{HgCl_2}\)
4. \(\mathrm{Hg_2Cl_2}\)
1. \(\mathrm{PbCl_2}\)
2. \(\mathrm{AgCl}\)
3. \(\mathrm{HgCl_2}\)
4. \(\mathrm{Hg_2Cl_2}\)
Subtopic: Detection of Cations |
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Which of the following cations cannot be separated by passing \(H_2S\) through their solutions to which \(NH_4OH\) has been added?
(a) \(Ca^{2+}\) and \(Ni^{2+}\)
(b) \(Mg^{2+}\) and \(Mn^{2+}~\)
(c) \(Ni^{2+}\) and \(Mn^{2+}\)
(d) \(Co^{2+}\) and \(Zn^{2+}\)
1. (a), (b), (d)
2. (c) and (d)
3. (a), (b), (c)
4. None of the above
(a) \(Ca^{2+}\) and \(Ni^{2+}\)
(b) \(Mg^{2+}\) and \(Mn^{2+}~\)
(c) \(Ni^{2+}\) and \(Mn^{2+}\)
(d) \(Co^{2+}\) and \(Zn^{2+}\)
1. (a), (b), (d)
2. (c) and (d)
3. (a), (b), (c)
4. None of the above
Subtopic: Detection of Cations |
67%
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What is the group reagent used for the precipitation of group II basic radicals in qualitative analysis?
1. \(\mathrm { Dilute } ~\mathrm{HCl}\)
2. \(\mathrm{Dilute }~ \mathrm{HCl}+\mathrm{H} _2 \mathrm{S} \)
3. \( \mathrm{Dilute~ H_{2}SO_{4} }\)
4. \(\mathrm { Dilute } ~\mathrm{NH}_{ 4} \mathrm{OH}\)
1. \(\mathrm { Dilute } ~\mathrm{HCl}\)
2. \(\mathrm{Dilute }~ \mathrm{HCl}+\mathrm{H} _2 \mathrm{S} \)
3. \( \mathrm{Dilute~ H_{2}SO_{4} }\)
4. \(\mathrm { Dilute } ~\mathrm{NH}_{ 4} \mathrm{OH}\)
Subtopic: Detection of Cations |
87%
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Which of the following radicals does not belong to the group first?
1. Ag+
2. Pb2+
3. \(\text{Hg}^{2+}_2\)
4. Hg2+
1. Ag+
2. Pb2+
3. \(\text{Hg}^{2+}_2\)
4. Hg2+
Subtopic: Detection of Cations |
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Subtopic: Detection of Cations |
79%
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The ion that cannot be precipitated by both \(\mathrm{HCl} \text { and } \mathrm{H}_2 \mathrm{~S} \) is :
1. \(\mathrm{Pb}^{2+}\)
2. \(\mathrm{Cu}^{+2}\)
3. \(\mathrm{Ag}^{+}\)
4. \(\mathrm{Sn}^{2+}\)
1. \(\mathrm{Pb}^{2+}\)
2. \(\mathrm{Cu}^{+2}\)
3. \(\mathrm{Ag}^{+}\)
4. \(\mathrm{Sn}^{2+}\)
Subtopic: Detection of Cations |
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This ion will generate gas bubbles upon the addition of hydrochloric acid:
1. \(\mathrm{Cu}^{2+}\)
2. \(\mathrm{CO}_3^{2-}\)
3. \(\mathrm{Fe}^{3+}\)
4. \(\mathrm{Al}^{3+}\)
1. \(\mathrm{Cu}^{2+}\)
2. \(\mathrm{CO}_3^{2-}\)
3. \(\mathrm{Fe}^{3+}\)
4. \(\mathrm{Al}^{3+}\)
Subtopic: Detection of Cations |
From NCERT
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What is the reagent used to identify Group 1 basic radicals?
| 1. | dil. HCl | 2. | conc. \(\mathrm{H}_2 \mathrm{SO}_4\) |
| 3. | \(\text{HNO}_3\) | 4. | \(\text{H}_2\text{S}\) |
Subtopic: Detection of Cations |
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Consider the following sequence of tests:
\(M^{n+} ~+ HCl \rightarrow \) White precipitate \(\xrightarrow \Delta \) water soluble
The metal ion \((M^{n+})\)) can be:
1. \(Hg^{2+}\)
2. \(Ag^{+}\)
3. \(Pb^{2+}\)
4. \(Sn^{2+}\)
\(M^{n+} ~+ HCl \rightarrow \) White precipitate \(\xrightarrow \Delta \) water soluble
The metal ion \((M^{n+})\)) can be:
1. \(Hg^{2+}\)
2. \(Ag^{+}\)
3. \(Pb^{2+}\)
4. \(Sn^{2+}\)
Subtopic: Detection of Cations |
52%
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- 1(current)
Q. No.
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