Q. No.A metal solution, when treated with dimethyl glyoxime and NH₄OH, forms a rose-red complex. The metal involved is:
| 1. | Nickel (Ni) | 2. | Vanadium (V) |
| 3. | Cobalt (Co) | 4. | Manganese (Mn) |
Subtopic: Detection of Cations |
72%
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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. | \(\mathrm{Hg_2Cl_2}\) |
Subtopic: Detection of Cations |
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NEET 2025 - Target Batch
Hints
Identify A, B and C in the given below reaction sequence:
1. PbCl2 , PbSO4 , PbCrO4
2. PbS, PbSO4 , PbCrO4
3. PbS, PbSO4 , Pb(CH3COO)2
4. PbCl2 , Pb(SO4)2 , PbCrO4
1. PbCl2 , PbSO4 , PbCrO4
2. PbS, PbSO4 , PbCrO4
3. PbS, PbSO4 , Pb(CH3COO)2
4. PbCl2 , Pb(SO4)2 , PbCrO4
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. (b) Only
(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. (b) Only
Subtopic: Detection of Cations |
65%
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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. | \(\mathrm { Dilute } ~\mathrm{NH}_{ 4} \mathrm{OH}\) |
Subtopic: Detection of Cations |
85%
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NEET 2025 - Target Batch
Hints
Which of the following radicals does not belong to the group first?
| 1. | Ag+ | 2. | Pb2+ |
| 3. | \(\text{Hg}^{2+}_2\) | 4. | Hg2+ |
Subtopic: Detection of Cations |
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Subtopic: Detection of Cations |
80%
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NEET 2025 - Target Batch
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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. | \(\mathrm{Sn}^{2+}\) |
Subtopic: Detection of Cations |
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NEET 2025 - Target Batch
Hints
Which ion, among the following, produces gas bubbles when hydrochloric acid is added?
| 1. | \(\mathrm{Cu}^{2+}\) | 2. | \(\mathrm{CO}_3^{2-}\) |
| 3. | \(\mathrm{Fe}^{3+}\) | 4. | \(\mathrm{Al}^{3+}\) |
Subtopic: Detection of Cations |
62%
From NCERT
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Identify the inorganic sulphides that are yellow in colour:
(A) (NH4)2S
(B) PbS
(C) CuS
(D) As2S3
(E) As2S5
Choose the correct answer from the options given below :
1. (A) and (C) only
2. (A), (D) and (E) only
3. (A) and (B) only
4. (D) and (E) only
(A) (NH4)2S
(B) PbS
(C) CuS
(D) As2S3
(E) As2S5
Choose the correct answer from the options given below :
1. (A) and (C) only
2. (A), (D) and (E) only
3. (A) and (B) only
4. (D) and (E) only
Subtopic: Detection of Cations |
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