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WorksheetsINTRODUCTION TO CHEMICAL ANALYSIS QUIZ
Total questions: 15
Worksheet time: 8mins
Which type of measurements rely on absolute values?
pH measurements
relative measurements
volumetric measurements
spectrophotometric measurements
What is the purpose of collecting homogeneous samples in analytical chemistry?
To ensure accurate representation of the bulk materials
To determine the concentration or amount of a substance
To relate properties to composition or stuctures
To diagnose disseases
Which type of acids are used for samples that will not dissolve in water?
hydrogen fluoride
aqua regia
oxidizing acids
non-oxidizing acids
In a redox titration, the analyte must be in a particular ____ before the titration begins.
oxidation state
concentration
temperature
pH level
It is a type of analysis where it focuses on determination of concentration or amount of a substance, it is called ____.
qualitative analysis
quantitative analysis
both qualitative and quantitative analysis
none of the above
Why is masking important in chemical analysis?
To separate the analyte from the interfering constituents
To determine the general composition of the sample
To eliminate interferences by converting them to a non interfering form
To select the method of analysis
In colorimetric method a colorless analyte must be converted to a ____ product for the measurement.
volatile
solid
colored
soluble
What is the purpose of dissolving samples?
To determine the water content
To decompose the samples
To determine the size of the sample
To analyze the water content in another sample
The following are examples of separation methods, except
masking
precipitation
extraction
chromatography
What is the main function of qualitative analysis in analytical chemistry?
To determine the concentration or amount of a substance
To identify the substances present
To determine the structure of a substance
To establish economic value of a substance
It is a branch of chemistry involved with the analysis of chemical substances.
Analytical chemistry
Inorganic chemistry
Organic chemistry
Biochemistry
Which area commonly involves analytical chemistry in determining health hazards?
controlling quality
establishing economic value
diagnosing disease
conducting research
What is the role of analytical chemistry in controlling quality?
Determining health hazards
Relating properties to composition or structures
Establishing economic value
Checking the quality of raw materials and finish products
What is the purpose of fusion in sample analysis?
To dissolve the samples in molten solvent
To cool the melt after dissolving the samples
To dissolve the samples in water
To determine the type of flux used
Which of the following ways can help improve confidence in the final results?
Using an outdated apparatus
Using impure solutions
Increasing the number of replicate determinations
Ignoring statistical analysis
