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WorksheetsQC FINAL ASSESSMENT
Total questions: 95
Worksheet time: 54mins
TRUE OR FALSE: Analytical Chemistry is often described as the area of chemistry responsible for characterizing composition of matter.
TRUE
FALSE
What do you call the science of inventing and applying the concepts, principles and strategies for measuring the characteristics of chemical systems?
Biochemistry
Organic Chemistry
Analytical Chemistry
Electrochemistry
Aspect of analytical chemistry that begins with the need to identify what is present in the sample.
quantitative analysis
qualitative analysis
Analysis that includes elemental analysis of a newly synthesized compound and measuring the concentration.
quantitative analysis
qualitative analysis
characterization analysis
fundamental analysis
It is an analysis directed towards improving the experimental methods used in the other areas of analytiacl chemistry.
quantitative analysis
qualitative analysis
characterization analysis
fundamental analysis
Which of the following laboratory equipment is the best to use in measuring a 10 mL liquid?
beaker
graduated cylinder
pippette
test tube
Which of the following lab apparatus measures temperature?
Weighing scale
thermometer
beaker
pH meter
Which of the following statements is correct?
When holding or heating a test tube, point it toward yourself or anyone else.
If you break glassware, notify your instructor to receive a replacement
Purses, backpacks, coats, etc. should be moved to the working area designated by your instructor to prevent chemicals being spilled on them.
When diluting acids, always add the water to acid.
Which apparatus protects the eyes from flying objects or chemical splashes?
beaker
graduated cylinder
goggles
gloves
It provides chemical or physical information about a sample.
analysis
analyte
matrix
chemicals
The component of interest in the sample is:
analysis
analyte
matrix
chemicals
The remainder of the sample is the:
analysis
analyte
matrix
chemicals
A ___________ is any chemical or physical principle we can use to study an analyte.
technique
method
procedure
protocols
A _________ is the application of a technique for a specific analyte in a specific matrix.
technique
method
procedure
protocol
A _________ is a set of written directions telling us how to apply a method to a particular sample, including information on obtaining samples, handling interferents, and validating results.
technique
method
procedure
protocol
A __________ is a set of stringent guidelines specifying a procedure that must be followed if an agency is to accept the results.
technique
method
procedure
protocol
What is the volume of the liquid in the picture
35 mL
35 grams
35 cm3
35 L
What tool is used to measure mass?
Graduated cylinder
Meter stick
Beaker
Digital electronic balance
The term molar, which describes a solution's concentration, is written as?
M
mol
g
g/L
Molarity is ...
grams of solute/deciliters of solvent.
grams of solute/liters of solution.
moles of solute/liters of solution.
moles of solute/milliliters of solvent.
Identify the lab equipment in the picture
evaporating dish
watch glass
mortar and pestle
funnel
Identify the lab equipment in the picture
evaporation
watch glass
mortar and pestle
funnel
Identify the equipment in the picture.
wire gauze
Bunsen burner
thermometer
utility clamp
Identify the equipment in the picture.
evaporating dish
watch glass
mortar and pestle
funnel
Identify the equipment in the picture.
scoopula
dropper
crucible tongs
glassware tongs
Identify the equipment in the picture.
beaker
graduated cylinder
Erlenmeyer flask
test tube
Identify the equipment in the picture.
scoopula
dropper
crucible tongs
glassware tongs
__________ is how closely the result of an experiment agrees with the “true” or expected result.
Accuracy
Presision
Sensitivity
Specificity
A method’s ability to demonstrate that two samples have different amounts of analyte is called __________ .
Accuracy
Precision
Sensitivity
Specificity
__________ is a measure of a method’s freedom from interferences.
Sensitivity
Selectivity
Robustness
Ruggedness
When a method is relatively free from chemical interferences, we can use it on many analytes in a wide variety of sample matrices. Such methods are considered __________.
Selective
Specific
Robust
Rugged
A _________ method is relatively insensitive to changes in experimental conditions.
Specific
Sensitive
Robust
Rugged
A __________ , a solution that does not contain the sample
signal
interference
method blank
procedure
_________ is the process of experimentally determining the value of kA by measuring the signal for one or more standard samples, each containing a known concentration of analyte.
Calibration
Precision
Sampling
Validation
What is the molality when 0.75 mole is
dissolved in 2.50 L of solvent?
0.3m
0.3M
0.03m
0.03M
The purpose of an analytical study is to obtain information about some object or substance. the following are the common steps involved in the process. Which is in correct order?
sampling>analysis>sample preservation>sample preparation
sampling>sample preparation>sample preservation>analysis
sampling? sample preservation>analysis>sample preparation
sampling>sample preservation>sample preparation>analysis
The ______________ is a plot of detector response as a function of concentration.
sample
calibration curve
sampling method
protocol
Common steps in sample preservation are:
the use of proper containers,
temperature control
addition of preservatives
observance of recommended sample holding time
(a) refers to activities that demonstrate that a certain quality standard is being met.
(a) refers to the practices and procedures involved in running a laboratory.
(a) refer to the specific techniques in sample preparation and analysis.
(a) are written descriptions of procedures of methods being followed.
(a) are used to assess the degree of contamination in any step of the measurement process. They may also be used to correct relatively constant, unavoidable contamination.
A (a) checks solvents and reagents that are used during sample preparation and analysis.
(a) is a measure of system contamination and is the instrumental response in the absence of any sample.
Round 63,488 to two significant digits
(a)
How many significant figures are there in 0.3760 g?
(a)
Calculate (4.0 x 10^-3)(1.2 x 10^-10)
Express your answer with the correct number of significant figures.
(a)
Solution of accurately known concentration is called (a)
Concordant results must be within___
0.1 cm3
1 cm3
0.1 L
0.01 cm3
To deliver a fixed accurate volume of a solution, use a
pipette
burette
dropper
beaker
The point in an acid-alkali titration at which the reactants just react completely with each other is called the __________ point.
end point
equivalence point
__________ is a suitable indicator for the titration of a strong acid and a weak alkali.
Methyl orange
Phenolphthalein
Litmus solution
Universal indicator
__________ is a suitable indicator for the titration of a weak acid and a strong alkali.
Methyl orange
Phenolphthalein
Litmus solution
Universal indicator
What is the reading on this burette?
(a)
25.0 cm3 of sodium hydroxide solution is tritrated against 0.200 mol dm–3 hydrochloric acid until the indicator just changes colour. 27.5 cm3 of the acid are required to reach the end point.
Phenolphthalein is used as an indicator in the above experiment. What will be its colour change at the end point?
From red to yellow
From red to colourless
From yellow to colourless
From yellow to red
An acid base titration involves a
composition reaction
neutralization reaction
single replacement reaction
displacement reaction
when titrating strong acid with a strong base, the equivalence point will be
below a pH of 7.0
above a pH of 7.0
will be at a pH of 7.0
will be either above or below 7.0
In volumetric analysis, the basis of analyte concentration is
Volume
Concentration
Weight
Both A and B
Volumetric Analysis is a
Qualitative method
Quantitative method
Semi quantitative method
Both A and B
Stiochiometric end point is
the point at which the color change is shown by the indicator
the point at which the reaction between titrant and titrate is just complete
the point at which equal volume of titrant and titrate reacts
Both A and B
The number of significant digits in 0.032 is
1
2
3
4
The number of significant digits in 410.00720 is
5
6
7
8
An analyst measures the volume of a solution as 8.89ml, but the actual volume is 10ml. Calculate the absolute error and relative error. (Relative error = Absolute error/standard value)
0.11 and 0.111
0.11 and 0.011
1.11 and 0.011
1.11 and 0.111
A person unable to judge the lower meniscus of burette at the endpoint during the titration comes under
Error of the method
Instrumental error
Personal error
Reagent error
Pure water contains
water molecules only
hydroxide ions only
hydronium ions only
water molecules, hydronium ions and hydroxide ions
If [H3O]+ ions of a solution is less than OH- ions, the solution is
always acidic
always basic
always neutral
may be acidic, basic or neutral
The pH scale in general uses ranges from
0 to 1
-1 to +1
0 to 7
0 to 14
Number of moles of a solute per litre of solution is
Molarity
Molality
Normality
PPM
One of the following is not a property of secondary standard substance
Secondary standard substance is less pure than primary standard substance
Secondary standard substance is less stable than primary standard substance
Secondary standard substance cannot be weighed easily
secondary standard substance is more pure than primary standard substance
The approximate molecular weight of NaOH is
50g/mol
20g/mol
40g/mol
35g/mol
The quantity of NaOH pellets required to prepare 0.05 M, 100 ml standard solution is
4 g
2 g
0.2 g
0.02 g
One of the following primary standard substance is not used for the standardization of sodium hydroxide solution
Oxalic acid
anhydrous sodium carbonate
potassium hydrogen phthalate
standardised HCl solution
The solvents which are basic in nature and used to increase the acidity of weakly acidic substances are known as
Protogenic solvents
Protophilic solvents
Aprotic solvents
None of the above
All the following are types of dissociating solvent, except
Protogenic solvents
Protophilic solvents
Amphiprotic solvents
Aprotic solvents
Glacial acetic acid is the leveling solvent for
Hydrochloric acid
Sulphuric acid
Perchloric acid
Acetic anhydride
____________ should be avoided in non aqueous titration
Light
Moisture
Dryness
None of the above
All of the following are Non-aqueous indicators except
Acetous Oracet blue
Acetous crystal violet
Eosin
Quinaldine red
The totality of features and characteristics of a product
or service that bears its ability to satisfy stated or implied needs.
Quality Management
Quality
Quality Engineering
Quality Risk Management
Quality is _______ (Select All that apply)
fitness for use
meeting customers expectations
conformance to standards or specifications;
superiority to competitors
standards that WHO and many national governments established Performance for pharmaceutical manufacturers covering, for example, personnel, facilities, packaging, and quality control.
QA
QC
GMP
QRM
QC = QA + GMP
True
False
Function of quality assurance--------
Stability study
Product quality review
Chemical analysis
Method validation
Which one of the following (s) is/are not of regulatory complice issue?
Process validation
Stability study
Product quality review
Marketing
The major types of Validation:
PROCESS VALIDATION
CLEANING VALIDATION
EQUIPMENT VALIDATION
VALIDATION OF ANALYTICAL METHODS
ABOVE ALL
Types of Process validation:
Prospective validation
Retrospective validation
Concurrent validation
Revalidation
Above all
Qualification can be considered to be a part of the validation process
True
False
To determine the amount of API is a......... analysis
qualitative
quantitative
To identify the quantity of exipients is a.................. analysis.
qualitative
quantitative
To identify the functional group of the API is a .............. analysis.
quantitative
qualitative
The most appropriate apparatus to transfer liquid is using
pipette
volumetric flask
Analytical balance should be place in a heavy table because
to maintain its function
to reduce analysis error
Purified water is use in the chemistry analysis because it is
pure
cheap
