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Q. No.The colour of the fumes evolved when nitrite reacts with dilute sulfuric acid is:
1. Reddish brown
2. Greenish
3. Yellow
4. Colorless
Subtopic: Detection of Anions |
86%
Level 1: 80%+
Hints
Which gas(es) is/are responsible for the reddish-brown fumes?
1. Nitrogen dioxide
2. Br2
3. Nitric oxide
4. Both (1) and (2)
1. Nitrogen dioxide
2. Br2
3. Nitric oxide
4. Both (1) and (2)
Subtopic: Detection of Anions |
75%
Level 2: 60%+
Hints
What is the characteristic odor produced when ethyl acetate is formed?
1. Vinegar-like
2. Fruity
3. Pungent
4. None of the above
1. Vinegar-like
2. Fruity
3. Pungent
4. None of the above
Subtopic: Detection of Anions |
Level 3: 35%-60%
Hints
Which reagent is used to detect the presence of acetate ions in the salt?
1. Dilute \(\mathrm{HCl}\)
2. Dilute \(\mathrm{H_2SO_4}\)
3. Dilute \(\mathrm{NaOH}\)
4. Dilute \(\mathrm{HNO_3}\)
1. Dilute \(\mathrm{HCl}\)
2. Dilute \(\mathrm{H_2SO_4}\)
3. Dilute \(\mathrm{NaOH}\)
4. Dilute \(\mathrm{HNO_3}\)
Subtopic: Detection of Anions |
67%
Level 2: 60%+
Hints
The colour of the precipitate of AgCl formed on the mixing of NaCl with AgNO3 is:
1. White
2. Green
3. Pink
4. Orange
1. White
2. Green
3. Pink
4. Orange
Subtopic: Detection of Anions |
91%
Level 1: 80%+
Hints
Which ion's presence is confirmed when the salt smells like vinegar
upon treatment with dilute sulfuric acid?
1. Acetate ion
2. Chloride ion
3. Sulfate ion
4. Nitrate ion
upon treatment with dilute sulfuric acid?
1. Acetate ion
2. Chloride ion
3. Sulfate ion
4. Nitrate ion
Subtopic: Detection of Anions |
89%
Level 1: 80%+
Hints
What color does acetate turn when it reacts with a neutral ferric chloride solution?
| 1. | Blue | 2. | Yellow |
| 3. | Deep red | 4. | Green |
Subtopic: Detection of Anions |
54%
Level 3: 35%-60%
Hints
Which gas gives dense white fumes when reacted with ammonium hydroxide?
| 1. | Oxygen gas | 2. | Hydrogen gas |
| 3. | HCl gas | 4. | Ammonia gas |
Subtopic: Detection of Anions |
80%
Level 1: 80%+
Hints
What reagents are added to the test solution to detect phosphate ions?
| 1. | Concentrated \(\mathrm{H_2SO_4 }\) and ammonium molybdate solution |
| 2. | Concentrated \(\mathrm{HCl}\) and ammonium sulfate solution |
| 3. | Concentrated \(\mathrm{HNO_3}\) and ammonium molybdate solution |
| 4. | Concentrated \(\mathrm{H_3PO_4}\) and ammonium chloride solution |
Subtopic: Detection of Anions |
58%
Level 3: 35%-60%
Hints
What color precipitate indicates the presence of phosphate ions in the test solution containing ammonium molybdate solution,conc. HNO3 and boil to the test solution containing phosphate ions?
| 1. | Blue | 2. | Canary yellow |
| 3. | Red | 4. | Green |
Subtopic: Detection of Anions |
85%
Level 1: 80%+
Hints
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