Practice MCQ For Govt Pharmacist Exam, in this article we will solve, Practice MCQ on the topic gravimetry under the subject Pharmaceutical inorganic chemistry of first semester. Read following article for your reference.
What is the principle of gravimetric analysis?
a) Measurement of volume
b) Measurement of mass
c) Measurement of density
d) Measurement of temperature
Which step in gravimetric analysis involves the formation of an insoluble compound?
a) Filtration
b) Precipitation
c) Drying
d) Weighing
What is the purpose of filtration in gravimetric analysis?
a) To dissolve the precipitate
b) To separate the precipitate from the solution
c) To weigh the precipitate
d) To dry the precipitate
In gravimetric analysis, why is the precipitate dried?
a) To make it soluble
b) To increase its mass
c) To remove water and other volatile impurities
d) To initiate a chemical reaction
What can affect the accuracy of gravimetric analysis?
a) The color of the precipitate
b) The smell of the precipitate
c) The purity of the precipitate
d) The taste of the precipitate
What is coprecipitation?
a) Precipitation of the analyte only
b) Precipitation of impurities only
c) Precipitation of both the analyte and impurities
d) Precipitation of neither the analyte nor impurities
What is postprecipitation?
a) Precipitation before filtration
b) Precipitation after filtration
c) Precipitation during filtration
d) Precipitation without filtration
How can coprecipitation be minimized in gravimetric analysis?
a) By increasing the temperature
b) By decreasing the temperature
c) By digestion or reprecipitation
d) By adding more solvent
What does the term ‘analyte’ refer to in gravimetric analysis?
a) The substance being analyzed
b) The substance used for analysis
c) The product of the analysis
d) The instrument used for analysis
In the gravimetric estimation of barium sulphate, which reagent is added to precipitate the sulfate ions?
a) Barium nitrate
b) Barium chloride
c) Barium carbonate
d) Barium hydroxide
What is the role of the precipitating agent in gravimetric analysis?
a) To dissolve the analyte
b) To precipitate the analyte
c) To weigh the analyte
d) To dry the analyte
What is the effect of impurities in the precipitate on the results of gravimetric analysis?
a) They increase the accuracy of the results
b) They decrease the accuracy of the results
c) They have no effect on the results
d) They make the results more precise
What is the purpose of drying the precipitate in gravimetric analysis?
a) To increase its solubility
b) To decrease its solubility
c) To remove water and other volatile impurities
d) To add water and other volatile impurities
In gravimetric analysis, what does the term ‘digestion’ refer to?
a) The process of dissolving the precipitate
b) The process of filtering the precipitate
c) The process of waiting for the precipitate to equilibrate and form larger, purer particles
d) The process of adding more solvent to the precipitate
In the gravimetric estimation of barium sulphate, what is the precipitate?
a) Barium chloride
b) Barium nitrate
c) Barium sulphate
d) Barium carbonate
What is the main disadvantage of gravimetric analysis?
a) It is not very precise
b) It is not very accurate
c) It is time-consuming
d) It is very fast
What is the main advantage of gravimetric analysis?
a) It is very fast
b) It is very precise and accurate
c) It is not very precise
d) It is not very accurate
In gravimetric analysis, what does the term ‘analyte’ refer to?
a) The substance being analyzed
b) The substance used for analysis
c) The product of the analysis
d) The instrument used for analysis
What is postprecipitation in gravimetric analysis?
a) Precipitation before filtration
b) Precipitation after filtration
c) Precipitation during filtration
d) Precipitation without filtration
What is the effect of coprecipitation on the results of gravimetric analysis?
a) It increases the accuracy of the results
b) It decreases the accuracy of the results
c) It has no effect on the results
d) It makes the results more precise
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