Q. No.When bismuth chloride is poured into a large volume of water, the formula for the white precipitate produced is:
1. \(Bi(OH)_3\)
2. \(Bi_2O_3 \)
3. \(BiOCl \)
4. \(Bi_2OCl \)
1. \(Bi(OH)_3\)
2. \(Bi_2O_3 \)
3. \(BiOCl \)
4. \(Bi_2OCl \)
Subtopic: Â Detection of Cations |
Level 3: 35%-60%
Hints
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: Â 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: Â Detection of Cations |
 55%
Level 3: 35%-60%
NEET - 2024
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: Â Detection of Cations |
 56%
Level 3: 35%-60%
NEET - 2024
Hints
\(\mathrm{NH}_4 \mathrm{SCN} \) can be used to test:
1. \(\mathrm{Fe}^{3+} \)
2. \(\mathrm{Co}^{2+}, \mathrm{Cu}^{2+}\)
3. \(\mathrm{Fe}^{3+}, \mathrm{Cu}^{2+}\)
4. All of the above.
Subtopic: Â Detection of Cations |
 53%
Level 3: 35%-60%
Hints
\(Cu^{2+}\) ions can be reduced to \(Cu^{+}\) ions by the addition of an aqueous solution of:
1. \(KF \)
2. \(KCl \)
3. \(KI \)
4. \(KOH \)
1. \(KF \)
2. \(KCl \)
3. \(KI \)
4. \(KOH \)
Subtopic: Â Detection of Cations |Â Detection of Anions |
 64%
Level 2: 60%+
Hints
\(Fe^{3+},Zn^{2+}\) and \(Cu^{2+}.\) cations are present in a slightly acidic solution. The reagent that when added in excess to this solution would identify to separate \(Fe^{3+}\) in one step is:
1. \(2M~HCl \)
2. \(6M~NH_3 \)
3. \(6M~NaOH \)
4. \(H_2S~\) gas
1. \(2M~HCl \)
2. \(6M~NH_3 \)
3. \(6M~NaOH \)
4. \(H_2S~\) gas
Subtopic: Â Detection of Cations |
Level 3: 35%-60%
Hints
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:
1. \(Hg^{2+}_2\) salt
2. \(Cu^{2+}\) salt
3. \(Ag^+\) salt
4. \(Pb^{2+}\) salt
The substance is a:
1. \(Hg^{2+}_2\) salt
2. \(Cu^{2+}\) salt
3. \(Ag^+\) salt
4. \(Pb^{2+}\) salt
Subtopic: Â Detection of Cations |
 74%
Level 2: 60%+
Hints
A solution when diluted with \(H_2O\) and boiled, gives a white precipitate. Upon addition of excess \(NH_4Cl/NH_4OH, \)the volume of precipitate decreases, leaving behind a white gelatinous precipitate. Identify the precipitate that dissolves :
1. \(Al(OH)_3\)
2. \(Z n(OH)_2\)
3. \(Ca(OH)_2\)
4. \(Mg(OH)_2\)
1. \(Al(OH)_3\)
2. \(Z n(OH)_2\)
3. \(Ca(OH)_2\)
4. \(Mg(OH)_2\)
Subtopic: Â Detection of Cations |
Level 3: 35%-60%
Hints
An aqueous solution of metal ion M1 reacts separately with reagents Q and R in excess to give tetrahedral and square planar complexes, respectively. An aqueous solution of another metal ion M2 always forms tetrahedral complexes with these reagents. Aqueous solution of M2 on reaction with reagent S gives a white precipitate which dissolves in excess of S.
M1, Q, and R, respectively, are:
1. \(Zn^{2+}, ~ KCN\) and \(HCl\)
2. \(Ni^{2+},~ HCl\) and \(KCN\)
3. \(Cd^{2+}, ~KCN\) and \(HCl\)
4. \(Co^{2+},~ HCl\) and \(KCN\)
M1, Q, and R, respectively, are:
1. \(Zn^{2+}, ~ KCN\) and \(HCl\)
2. \(Ni^{2+},~ HCl\) and \(KCN\)
3. \(Cd^{2+}, ~KCN\) and \(HCl\)
4. \(Co^{2+},~ HCl\) and \(KCN\)
Subtopic: Â Detection of Cations |
 65%
Level 2: 60%+
Hints
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