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Q. No.1 mL of an aqueous salt solution is heated with 2 mL of concentrated sulfuric acid. It is then cooled and then mixed with a freshly prepared ferrous sulfate solution. What will form as a result of this steps?
1.
Brown precipitate
2.
Dark brown ring
3.
White precipitate
4.
Green solution
Subtopic: Detection of Anions |
68%
Level 2: 60%+
Hints
Which acid is used to acidify the solution before adding barium chloride to test for sulphate ions?
1. Sulphuric acid
2. Hydrochloric acid
3. Nitric acid
4. Acetic acid
1. Sulphuric acid
2. Hydrochloric acid
3. Nitric acid
4. Acetic acid
Subtopic: Detection of Anions |
Level 3: 35%-60%
Hints
Lead sulphate is insoluble in which solution?
1. Hydrochloric acid
2. Nitric acid
3. Acetic acid
4. Water
1. Hydrochloric acid
2. Nitric acid
3. Acetic acid
4. Water
Subtopic: Detection of Anions |
55%
Level 3: 35%-60%
Hints
What happens when barium chloride is added to an acidic solution containing sulphate ions?
1. Formation of a white precipitate of barium sulphate
2. Formation of a yellow precipitate of barium chloride
3. Formation of a blue precipitate of barium acetate
4. No reaction occurs
1. Formation of a white precipitate of barium sulphate
2. Formation of a yellow precipitate of barium chloride
3. Formation of a blue precipitate of barium acetate
4. No reaction occurs
Subtopic: Detection of Anions |
83%
Level 1: 80%+
Hints
The colour of the fumes evolved when nitrite reacts with dilute sulfuric acid is:
1. Reddish brown
2. Greenish
3. Yellow
4. Colorless
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
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