- 1(current)
Q. No.Given below are certain cations. Using inorganic qualitative analysis, arrange them in increasing group number from I to VI.
A. Al3+
B. Cu2+
C. Ba2+
D. Co2+
E. Mg2+
Choose the correct answer from the options given below
A. Al3+
B. Cu2+
C. Ba2+
D. Co2+
E. Mg2+
Choose the correct answer from the options given below
| 1. | B, C, A, D, E | 2. | E, C, D, B, A |
| 3. | E, A, B, C, D | 4. | B, A, D, C, E |
Subtopic: Detection of Cations |
51%
Level 3: 35%-60%
NEET - 2024
Hints
In salt analysis, group V radicals \(\mathrm{(Ba^{2+}, Ca^{2+} ~and ~Sr^{2+} )}\) are precipitated as their carbonates by adding solid \(\mathrm{NH_4Cl}\) and excess of \(\mathrm{NH_4OH}\) solution followed by solid \(\mathrm{(NH_4)_2CO_3}\)
Choose the correct reagent used for the confirmation of \(\mathrm{Ca^{2+}}\) ion from the following:
Choose the correct reagent used for the confirmation of \(\mathrm{Ca^{2+}}\) ion from the following:
| 1. | Ammonium sulphate | 2. | Potassium chromate |
| 3. | Ammonium oxalate | 4. | Ammonium nitrate |
Subtopic: Detection of Cations |
55%
Level 3: 35%-60%
NEET - 2024
Hints
Brown ppt (A) dissolves in \(HNO_3\), gives (B) which in turn gives white ppt (C) with \(NH_4OH\). (C) on reaction with HCl gives solution (D), which gives white turbidity on addition of water. What is (D)?
1. \(Ca(OH)_2\)
2. \(Bi(OH)_3\)
3. BiOCl
4. \(Bi(NO_3)_3\)
1. \(Ca(OH)_2\)
2. \(Bi(OH)_3\)
3. BiOCl
4. \(Bi(NO_3)_3\)
Subtopic: Detection of Cations |
Level 3: 35%-60%
Please attempt this question first.
Hints
Match the items given in List-I with those in List-II and select the correct option given below:
Options:
| List-I (Test/reagent) |
List-II (Radical identified) |
||
| A. | Lake Test | I. | \( \mathrm{NO}_3^{-} \) |
| B. | Nessler's Reagent | II. | \(\mathrm{Fe}^{3+} \) |
| C. | Potassium sulpho cyanide | III. | \( \mathrm{Al}^{3+}\) |
| D. | Brown Ring Test | IV. | \(\mathrm{NH}_4^{+}\) |
| 1. | A-IV, B-II, C-III, D-I | 2. | A-II, B-IV, C-III, D-I |
| 3. | A-II, B-III, C-IV, D-I | 4. | A-III, B-IV, C-II, D-I |
Subtopic: Detection of Cations |
56%
Level 3: 35%-60%
NEET - 2024
Hints
When H₂S is passed through a solution containing a Group-IV cation, a precipitate forms. This precipitate dissolves in dilute HCl, producing a white precipitate with NaOH solution and a bluish-white precipitate with basic potassium ferrocyanide. Identify the cation.
1. \(CO^{2+}\)
2. \(Ni^{2+}\)
3. \(Mn^{2+}\)
4. \(Zn^{2+}\)
1. \(CO^{2+}\)
2. \(Ni^{2+}\)
3. \(Mn^{2+}\)
4. \(Zn^{2+}\)
Subtopic: Detection of Cations |
62%
Level 2: 60%+
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Hints
Which of the following cations precipitate as their chlorides?
(a) \(Pb^{2+}\)
(b) \(Ag^{+}\)
(c) \(Hg^{2+}_2\)
(d) \(Cd^{2+}\)
1. (a), (b), (d)
2. (b) and (c)
3. (a), (b), (c)
4. None of the above
(a) \(Pb^{2+}\)
(b) \(Ag^{+}\)
(c) \(Hg^{2+}_2\)
(d) \(Cd^{2+}\)
1. (a), (b), (d)
2. (b) and (c)
3. (a), (b), (c)
4. None of the above
Subtopic: Detection of Cations |
75%
Level 2: 60%+
Hints
Incorrect statements among the following are:
1. (a), (b) and (d)
2. (c) and (d)
3. (a), (b) and (c)
4. (a), (b), (c) and (d)
| (a) | Group I radicals are precipitated as chloride |
| (b) | Group IV radicals are precipitated as sulphide |
| (c) | Group V radicals are precipitated as hydroxide |
| (d) | Group III radicals are precipitated as chloride |
2. (c) and (d)
3. (a), (b) and (c)
4. (a), (b), (c) and (d)
Subtopic: Detection of Cations |
61%
Level 2: 60%+
Hints
A basic radical among the following that cannot be precipitated by
\(H_2S \) gas in the presence of \(NH_3 \) is:
1. \(Mn^{2+}\)
2. \(Ni^{2+}\)
3. \(Cd^{2+}\)
4. \(Ca^{2+}\)
\(H_2S \) gas in the presence of \(NH_3 \) is:
1. \(Mn^{2+}\)
2. \(Ni^{2+}\)
3. \(Cd^{2+}\)
4. \(Ca^{2+}\)
Subtopic: Detection of Cations |
61%
Level 2: 60%+
Hints
Nessler's reagent is used to detect:
1. \(CrO^{2-}_4\)
2. \(PO^{3-}_4\)
3. \(MnO^{-}_4\)
4. \(NH^{+}_4\)
1. \(CrO^{2-}_4\)
2. \(PO^{3-}_4\)
3. \(MnO^{-}_4\)
4. \(NH^{+}_4\)
Subtopic: Detection of Cations |
78%
Level 2: 60%+
Hints
Which of the following cations will turn a borax bead green when heated in a reducing (luminous) flame?
| 1. | \(\mathrm{Fe^{3+}}\) | 2. | \(\mathrm{Cu^{2+}}\) |
| 3. | \(\mathrm{Mn^{2+}}\) | 4. | \(\mathrm{Ni^{2+}}\) |
Subtopic: Detection of Cations |
Level 3: 35%-60%
JEE
Please attempt this question first.
Hints
- 1(current)
Q. No.
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