Practice MCQ For Govt Pharmacist Exam, in this article we will solve, Practice MCQ on the topic precipitation titrations under the subject Pharmaceutical inorganic chemistry of first semester. Read following article for your reference.
Precipitation Titrations » PHARMACAREERS
What is the principle of precipitation titrations?
a) Reaction between an analyte and a titrant to form a gas
b) Reaction between an analyte and a titrant to form a precipitate
c) Reaction between an analyte and a titrant to form a complex
d) Reaction between an analyte and a titrant to form a solution
Which method in precipitation titration is used to determine the concentration of chloride ions in a solution?
a) Fajan’s method
b) Mohr’s method
c) Volhard’s method
d) All of the above
In the Mohr’s method of precipitation titration, what is used as the indicator?
a) Potassium chromate
b) Ferric alum
c) Dichlorofluorescein
d) Methyl orange
In which method is the end point detected by the formation of a red-colored complex due to the reaction of iron (III) with thiocyanate?
a) Fajan’s method
b) Mohr’s method
c) Modified Volhard’s method
d) Volhard’s method
Precipitation titrations are commonly used in the analysis of:
a) Halides and pseudohalides
b) Certain metal ions
c) Organic compounds
d) All of the above
In the Fajan’s method of precipitation titration, what happens when all the chloride ions have reacted with the silver ions?
a) The solution turns colorless
b) The solution turns red
c) The solution turns yellow
d) The solution turns blue
Why is Volhard’s method carried out in an acidic solution?
a) To prevent the hydrolysis of Fe3+
b) To prevent the hydrolysis of Ag+
c) To prevent the hydrolysis of Cl-
d) To prevent the hydrolysis of SCN-
In the Modified Volhard’s method, why is back titration used?
a) To determine the concentration of halide ions in a solution
b) To determine the concentration of silver ions in a solution
c) To determine the concentration of thiocyanate ions in a solution
d) To determine the concentration of ferric ions in a solution
Which of the following is not a true statement about precipitation titrations?
a) The reaction must occur in a solution that is saturated with the precipitate
b) The precipitate formed should be of high solubility
c) The amount of precipitate formed is directly proportional to the amount of analyte in the solution
d) Precipitation titrations are commonly used in the analysis of halides and pseudohalides
In a precipitation titration, what is the significance of the end point?
a) It indicates the start of the titration
b) It indicates the maximum amount of titrant that can be added
c) It indicates that all of the analyte has reacted with the titrant
d) It indicates the minimum amount of titrant that can be added
In the Fajan’s method, which indicator is commonly used?
a) Potassium chromate
b) Ferric alum
c) Dichlorofluorescein
d) Methyl orange
In a precipitation titration, what does the end point indicate?
a) The start of the reaction
b) The maximum amount of titrant that can be added
c) The point at which all of the analyte has reacted with the titrant
d) The minimum amount of titrant that can be added
Which of the following is not a true statement about the Modified Volhard’s method?
a) It is a type of back titration
b) It is used to determine the concentration of halide ions in a solution
c) It uses silver nitrate as the titrant
d) It uses ferric alum as the indicator
Which method in precipitation titration is carried out in an acidic solution?
a) Fajan’s method
b) Mohr’s method
c) Volhard’s method
d) Modified Volhard’s method
Precipitation titrations are commonly used in the analysis of:
a) Halides and pseudohalides
b) Certain metal ions and organic compounds
c) Both a and b
d) None of the above
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