- 1(current)
Q. No.Match the anion radicals given in List I with the corresponding characteristics in List II and select the correct option given below:
Codes:
1. A-III, B-I, C-II, D-IV
2. A-II, B-I, C-IV, D-III
3. A-IV, B-I, C-III, D-II
4. A-IV, B-I, C-II, D-III
| List-I (Anions) | List-II (Gas evolved on reaction with dil H2SO4) |
||
| A. | \(\mathrm{CO}_3^{2-}\) | I. | Colourless gas that turns lead acetate paper black. |
| B. | \(\mathrm{S}^{2-}\) | II. | Colourless gas that turns acidified potassium dichromate solution green. |
| C. | \(\mathrm{SO}_3^{2-}\) | III. | Brown fumes that turn acidified \(\mathrm{KI}\) solution containing starch blue. |
| D. | \(\mathrm{NO}_2^{-}\) | IV. | Colourless gas evolved with brisk effervescence, which turns lime water milky. |
1. A-III, B-I, C-II, D-IV
2. A-II, B-I, C-IV, D-III
3. A-IV, B-I, C-III, D-II
4. A-IV, B-I, C-II, D-III
Subtopic: Detection of Anions |
78%
Level 2: 60%+
JEE
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Hints
Which of the following statements is incorrect with respect to the nitrate ion test?
| 1. | A dark brown ring is formed at the junction of two solutions. |
| 2. | Ring is formed due to nitroso ferrous sulphate complex. |
| 3. | The brown complex is \(\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_5(\mathrm{NO})\right]{\mathrm{SO}_4}\) |
| 4. | Heating the nitrate salt with conc. \(\text{H}_2\text{SO}_4,\) light brown fumes are evolved. |
Subtopic: Detection of Anions |
Level 3: 35%-60%
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Hints
Please attempt this question first.
Consider the sulphides \(HgS,PbS,CuS, Sb_2S_3,As_2S_3\) and \(CdS.\). Number of these sulphides soluble in \(50\% ~HNO_3\) is :
1. 0
2. 4
3. 2
4. 5
1. 0
2. 4
3. 2
4. 5
Subtopic: Detection of Anions |
Please attempt this question first.
Hints
- 1(current)
Q. No.
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