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WorksheetsPrecipitation Titration
Total questions: 15
Worksheet time: 8mins
Which of the following is the correct indicator used in Mohr’s method?
Potassium chromate (K₂CrO₄)
Ferric ion (Fe³⁺)
Fluorescein
Methyl orange
In the Volhard method, which titrant is commonly used?
NaOH
AgNO
K₂CrO₄
Na₂S₂O₃
Fajan’s method involves which of the following types of indicators?
Acid-base indicators
Adsorption indicators
Redox indicators
Metal ion indicators
What is the main difference between Mohr’s and Volhard’s methods?
Mohr’s method uses a back titration, Volhard uses direct titration
Mohr’s method is conducted in acidic medium, Volhard in alkaline
Mohr’s method is a direct titration, Volhard is a back titration
Both are indirect methods
Which method is suitable for chloride ion determination in strongly acidic solution?
Mohr
Mohr
Volhard
All of the above
Why is nitric acid used in Volhard's method?
To increase the pH
To dissolve excess silver chloride
To prevent the formation of silver chromate
To maintain an acidic medium and prevent side reactions
In the Volhard titration, what is the role of the silver nitrate solution?
To precipitate the halide ions
To act as a reducing agent
To maintain the pH of the solution
To serve as a complexing agent
What is the endpoint indicator used in Mohr's titration for chloride ions?
Litmus
Methyl red
Phenolphthalein
Potassium chromate (K₂CrO₄)
What type of indicator is typically used in Fajan's titration?
pH indicators
Complexometric indicators
Adsorption indicators
Redox indicators
In Fajan's method, what is the significance of the color change observed at the endpoint?
It indicates the completion of precipitation
It shows the neutralization of acid
It signifies the formation of a complex
It marks the end of a redox reaction
Which of the following ions can be determined using Fajan's titration method?
Calcium ions (Ca²⁺)
Chloride ions (Cl⁻)
Iron ions (Fe³⁺)
All of the above
In a Fajans titration for the determination of chloride ions, what is the color change observed at the endpoint when fluorescein is used as the adsorption indicator?
Yellow → Colorless
White → Red
Greenish-yellow → Pink/Red
Blue → Yellow
Which indicator is most suitable for the determination of chloride ions by Fajans titration?
Potassium chromate
Ferric alum
Fluorescein
Eosin
What is the color of the precipitate formed when silver ions react with chloride ions?
Ag+ + Cl− → AgCl(s)
Yellow
White
Brown
Red
Fajans titration is best classified as which type of titration?
Indirect titration
Back titration
Direct precipitation titration
Complexometric titration
