Anachem Flashcards
(178 cards)
1
Q
Which of thw ff is associated with the corrosionof sanitary sewers?
A. H2S
B. BOD
C. fats oils and grease
D. NH3
A
A
2
Q
For coal-fired steam electric power plants, control of SOx emissions is most commonly achieved by:
A. Lime scrubbing
B. Catalytic conversion
C. Electrostatic precipitation
D. Carbon adsorption
A
A
3
Q
Nitrification is ____ of nitrogen compound
A. Oxidation
B. Reduction
C. Both a and b
D. NOTA
A
A.
4
Q
All of the following is used as a hygroscopic material in desiccators except
A. CaSo4
B. Mg(ClO4)2
C. P2O5
D. CuSO4
A
D
5
Q
Analytical methods classifiedas micro analyses use sample mass ranging from
A. <1 mg
B. 1-10 mg
C. 10-100 mg
D. >100 mg
A
B
6
Q
Chemicals which are tested by the manufacturers showing the actual percentages of impurities and labeled on the containers are called _____
A. Reagent grade chemicals
B. Analytical reagent
C. Certified reagent
D. All of these
A
D
7
Q
Platinum crucibles can be used for the following processes without significant loss except
A. Fusion with sodium carbonate, borax or alkali bidluorides
B. Evaporation with hydrofluoric acid
C. Ignition of oxides of Ca and Sr
D. Heating with sulfides
A
D
8
Q
What grade of water as defined by the british standard 3978 is suitable for the determination of trace quantities which can be prepared by the distillation of deionized water?
A. Grade 1
B. Grade 2
C. Grade 3
D. Grade 4
A
B
9
Q
The following describes colloidal suspensions formed during precipitation except
A. These particles are almost invisible to the naked eye
B. They settle readily from a given solution
C. They ate not easily filtered
D. NOTA
A
B
10
Q
Among the following processes, all of thw following will produce an alkane from an alkyl halide except
A. Wurtz synthesis
B. Reduction with zinc
C. Hydrogenation
D. Corey-house synthesis
A
C
11
Q
Which of the following reaction will produce an isobutyl alcohol from isobutene
A. Acid-Catalysed-hydration
B. Hydrogenation-oxidation
C. Oxymercuration-demecuration
D. All of these
A
B
12
Q
The following are correctly named except.
A. 3-ethylpentane
B. P-dichlorobenzene
C. N-methylbutamide
D. 5-hexanone
A
D
13
Q
Higher order alcohol cann be prepared from carbonyl compounds using
A. LiAlH4
B. Zinc metal
C. Grignard Reagent
D. Ether
A
C
14
Q
Aromatic compounds are characteristics of
A. Nucleophilic substitution
B. Nucleophilic addition
C. Electrophilic substitution
D. Electrophilic addition
A
C
15
Q
The number of primary hydrogen ethane has is
A. 1
B. 2
C. 3
D. 6
A
D
16
Q
Which of the following alkanes would yield a monohalogenated product
A. Propane
B. Ethane
C. Butane
D. Pentane
A
B
17
Q
When 3-methyl-2-butanol undergoes dehydration, the major product is
A. 2-methyl-1-butene
B. 2-methyl-2-butene
C. 2-butene
D. 1-butene
A
B
18
Q
The following alkyl-halides will produce 2-methylpropene ipon reaction with alcoholic KOH except
A. Isobutyl-chloride
B. Chlorobutane
C. Tert-butyl-chloride
D. 1-chloro-2-methylbutane
A
B
19
Q
Which of the following reactions will yield an alcohol from alkenes?
A. Oxymercuration-demercuration
B. Hydroboration-oxydation
C. Hydroxylation
D. All of the above
A
D
20
Q
Ozonolysis of alkenes gives a/an
A. Aldehyde (ketone)
B. Alcohol
C. Ether
D. Halihydrin
A
A.
21
Q
Addition of halogens in alkenes using a non-polar solvent yields
A. Geminal dihalide [magkabahay(marko)]
B. Vicinal dihalide [magkapitbahay(anti marko)]
C. Tetrahalide
D. Halohydrin
A
B
22
Q
Markovnikov’s addition of HBr to alkynes dominantly produces
A. Geminal dihalidw
B vicinal dihalide
C. Tetrahalide
D. Halohydrin
A
A
23
Q
Hydration of alkynes yields
A. Epoxide
B. Ketone
C. Alcohol
D. Ether
A
B
24
Q
Delocalization of pi electrons
A. Rearrangement
B. Isomerism
C. Hyperconjugation
D. Resonance
A
D
25
In organic chemistry, what is reduction?
A. Gain of electrons
B. Decrease in oxidation number
C. Loss of electrons
D. Both a and b
D
26
What is the functional group attached to benzene when it is converted to toluene
A. Carbonyl group
B. Amide group
C. Vinyl group
D. Methyl group
D
27
Which is not a benzene derivative?
A. Phenanthrene (irritan sa cigarette)
B. Anthracene (red eye)
C. Bromoethane
D. Naphthalene
C
28
How many isomers are possible for propane
A. 1
B 2
C 3
D 0
1 (itself)
29
In the analysis of iron in an ore,the sample is dissolved in acid and iron is precipitated as Fe(OH)3. After ignition, the weighed substance is
A. FeO
B. Fe3O4
C. Fe2O3
D. Fe
C
30
What do you call a combination of two or more materials which retain their individual properties and can be separated by physical means
A. Solvents
B. Reactions
C. Mictures
D. Solutions
C
31
A polar solute usually dissolves in a polar solvent and a nonpolar solute usually dissolves in a nonpolar solvent. This is
A. Hund's rule
B. The solubility rule
C. Henry's rule
D. The "like dissolves like" rule
D
32
Solutions of electrolytes and metals are
A. Insulators
B. Polar
C. Negtaive
D. Conductors
D
33
A statement that sums up what you learned from an experimental and states if the hypothesis is proven or disproven is called
A. Procedure
B. Hypothesis
C. Control group
D. Conclusion
D
34
A prediction or a possible explanation to the question or problem which can be tested in an experiment is called
A. Hypothesis
B. Procedure
C. Graph
D. Data
A
35
Express the number 0.051065 to 4 sig figure
A. 0.0151
B. 0.051
C. 0.05106
D. 0.0511
C ( leading zeroes are insignificant)
36
What is the most common isotope of hydrogen
A. H only has one isotope
B. Tritum
C. Deuterium
D. Protium
D
37
As you move from top to bottom down the periodic table
A. A change in atomic radius cannot be predicted
B. Ionization energy inc
C. Eletronegativity dec
D. Atomic radius dec
C
38
What do you call an atom that has more protons than electrons
A. An anion
B. A molecule
C. None of the choices
D. An isotope
C. (Cation)
39
Which of the ff is a chemical equation?
A. CO2
B C + O2 > CO2
C ice + heat > H2O
D. Iron + oxygen > rust
B
40
As you move from left to right across the periodic table
A. Atomic radius increases
B. Ionization energy decreases
C. Electronegativity decreases
D. Atomic radius decreases
D
41
Whuch is NOT an acceptable name for Hg2Cl2
A. Mercury (II) Chloride
B. Mercury (I) chloride
C. Mercurous chloride
D. Dimercury dichloride
A
42
Under the Lewis concept of acids and bases, an acid is
A. An electron pair donor
B. A proton acceptor
C. A proton donor
D an electron pair acceptor
D
43
Which of the following is NOT an acid
A. Milk of magnesia
B. Milk
C. Apple juice
D. Gastric juice
A
44
Which of the ff is NOT an acid-base conjugate pair?
A. NH3 and NH4
B. H2S an OH-
C H2O and OH-
D HCN and CN-
B
45
When NH4Cl hydrolyzes, the resulting solution is _____
A. Acidic
B. Basic
C. Neutral
D. None of the choices
A
46
Aqua regla, the reagent that can be used to dissolved gold, is a 3:1 mixtureof which acids?
A. Hydrochloric and nitric acida
B. Hydrofluoric and nitric acids
C. Hydrochloric and sulfuric acids
D. Perchloric and sulfuric acids
A
47
What is the gas which behaves the most like an ideal gas?
A. Oxygen
B. Nitrogen
C. Helium
D. Hydrogen
C
48
What happens tothe volume of a fully inflated balloon when it is taken outside on a cold day?
A. Volume dec
B. Volume inc
C. It remains the same
D. Volume becomes equal to zero
A
49
The standard pressure of the atmosphere at sea level is
A. 760 mmhg
B 760 torr
C all of the choices
D 1 atm
C
50
When chromium changes from an oxidation state of +3 to that of +6, the Cr3 must:
A. Gain 6 electrons
B. Lose 3 electrons
C. Lose 6 electrons
D. Gain 3 electrons
B
51
During the electroplating of silver, silver ions in solution
A. Are oxidized at the anode
B. Are oxidized at the cathode
C. Are reduced at the cathode
D. Remain in solution unchanged
C
52
The equation that represents a reaction that is NOT a redox reaction is:
A. 2H2+O2 ----> 2H2O
B. Zn + CuSO4 --->ZnSO4+Cu
C. 2h2O----->2h2O+O2
D. H2O +CO2 ----> H2CO3
D
53
In an electrolytic cell oxidation occurs
A. At the anode
B. Between the cathode
C. At either the cathode or the anode
D. At the cathode
A
54
What is the main ISO standard used by testing and calibration laboratories to gain accreditation and formal recognition of their competence to carry out test and/or calibration, including sampling
A. ISO/IEC 17025
B. AOAC
C. EUROCHEM
D. ISO 9000:2000
A
55
A water sample is collected for analysis of oil and grease. The analysis will not be done immediately. The sample shoukd NOT be
A. Collected in plastic bottle
B. Preserved with sulfuric acid
C. Refrigerated til analyzed
D. Collected in all glass bottle
D
56
In maintenance amd storage of pH meters, which of the ff procedure shall not be done
A. Mold soap solution may be used in general cleaning of the electrodes
B. To keep the electrode bulb moist during storage, store the electrode in distilled water
C. Blot the electrode dry after rinsinv the pH electrode
B
57
In purifying a material by crystallization choose the solvent according to the following except
A. Solubility
B. Vapor pressure
C. Reactivity
D. Polarity
B
58
The dynamic range in analytical measurement refers to the range where___
A. The instrument reading is constant
B. The detection limit lies
C. The sensitivity of the instrument is highest
D. The instrument reading is linearly related to the input values
B
59
What is the lw that states the linear relationship between absorbance annd concentration of an absorbing species
A. Boyle's law
B. Charles law
C. Beer-lambert's law
D. Avogadro's law
C
60
In which of the ff titration does pH=7 occur at the equivalence point
A. SA/SB
B. SA/WB
C. WA/SB
A
61
In LLE, it is often necessary to determine which liquid is aqueous and nonaqueous. To test the liquid, add a drop of water to the top layer. If the drop dissolves in the top layer, the top layer is___
A. Aqueous
B. Denser
C. Miscible
D. Nonaqueous
A
62
67. The process in which the sample is heated to the boiling point of the solvent and volatile analytes are concentrated in the vapour phase, condensed and collected
A. Distillation
B. LLE
C. Evaporation
D. Oven drying
A
63
Glass container is not suitable for___
A oil and grease determination
B. Microbiological analyses
C. All of the choices
D. Inorganic trace analyses
D
64
The maximum holding time for acid preserved samples that will be subjected to determination of metals is
A. 48 hours
B. 6 months
C. 3 months
D 1 week
B
65
Quantitative chemical analysis of weighing a sample, usually of a separated and dried precipitate is called
A. Gravimetric analysis
B. Elemental analysis
C. Volumetric analysis
D. Titrimetric analysis
A
66
Whuch of the following is a primary standard for use in standardizing bases?
A. Acetic acid
B. Sulfuric acid
C. Potassium hydrogen phthalate
D. Ammonium hydroxide
C
67
What is the light source used in the visible range to 340-1000 nm
A. Nerst blower
B. Deuterium
C. Tungsten
D. Incandescent
C or b
68
Minimum concentration of a substance that can be measured and reported with 99% confidence that the analyte concentration is greater than zero refers to _____
A. Lower warning limit
B. Lower control limit
C. Method detection limit
D. Limit of quantitation
C
69
Which of the ff instruments uses a Cuvette
A. Gas chromatograph
B. Uv-Vis spectrophotometer
C. Ph meter
D. Flame AAS
B
70
The most appropriate technique to determine levels of the Pb2+ ion in blood is_____
A. AAS
B. Mass spectrometry
C. Infrared spectroscopy
D. High performance liquid chromatography
A
71
Analytical methods or instruments' performance aim for
A. Low-signal-to-noise ratio
B. High variability
C. Low dynamic range
D. High signal-to-noise ratio
A
72
A graphical representation of Measuring signal as a function of quantity of analyte is called
A. Absorbance chart
B. Calibration curve
C. Quality control chart
D. None of the choices
B
73
A food scientist has a sample of a plantoil and wants to determine if the oil contains saturated or unsaturated fatty acids. Which of the following spectroscopic techniques would be most useful for this purpose?
A. mass specroscopy
B. ultraviolet spectroscopy
D. visible spectroscopy
C. infrared spectroscopy
C
74
For the rxn fe3+ SCN ---> FESCN2+, the equilibrium constant for this rxn can best be determined by means of
A. Ion exchange
B. Conductance
C. Spectrophotometry
D. Chromatography
C
75
Electrophiles are
a. electron deficient species
b. electron rich species
c. electrically neutral species
d. positively charged ion
A
76
In the decomposition and dissolution of solids during sample preparation, which of the following is expensive and often the last resort?
a. Acid treatment using oxidation
b. Fusion technique
c. dissolution using ultrasound & appropriate solvent
d. Simple dissolution
B
77
It is important to discard containers that are scratched or abraded on their interior surfaces. The internal surface area of a container, whether used for sample preparation or storage, may cause loss of
a. matrix
b. analyte
c. weight
d. ash
B
78
The HPLC column type in which molecules are separated according to size.
a. Ion exchange
b. size exclusion
c. normal phase
d. reverse phase
B
79
During ignition for ashing, muffle furnaces that go up to 1100oC are used primarily for this and ________ is needed to contain the sample.
a. porcelain crucible
b. evaporating dish
c. beaker
d. all of the above
A
80
In AAS method, If the sample concentration is too high to permit accurate analysis in linearity response range, there are alternatives that may help bring the absorbance into the optimum working range.
a. sample dilution
b. using an alternative wavelength having a lower absorptivity
c. reducing the path length by rotating the burner hand
d. All of the above
D
81
A buffer solution may be a mixture of
a. a weak acid and its salt
b. a weak base and its salt
c. an excess of a weak acid with a strong base
d. all of the above
D
82
Which statement is true?
A. The value of the equilibrium constant increases with the addition of a catalyst b. A catalyst speeds up both the forward and reverse reaction rates
c. The greater the activation energy, the faster the rate of reaction.
d. A catalyst increases the rate of reaction by decreasing the number of collisions
B
83
Molecular oxygen is highly soluble in the blood because
a. the hemoglobin molecule can bind up to four oxygen molecules
b. the solubility of oxygen is increased by the higher temperature of the body c. pressure is increased inside the body d. pressure inside the body is different outside of it
A
84
When water is heated in a beaker, bubbles of air form on the side of the glass before the water boils. This shows that
a. the solubility of gases in water decreases with increasing temperature
b. the solubility of gases in water increases with increasing temperature
c. the solubility of gases in water decreases with decreasing temperature
d. the solubility of gases in water increases with decreasing temperature
A
85
Method of passing the sample through a metal or plastic mesh of a uniform cross-sectional area to separate particles into uniform sizes.
a. sieving
b. pulverizing
c. macerating
d. milling
A
86
What type of container must be used for acid or alkali wastes?
a. Polyethylene Drums
b. Metal drums
c. Fiber Drums
d. Cloth container
A
87
A solid waste management practice which refers to the controlled decomposition of organic matter by microorganisms, mainly bacteria and fungi, into a humus-like product.
a. Composting
b. Recycling
c. Bioremediation
d. Reducing
A
88
A series of reference standards solutions that have known and accurate pH values at different temperatures used for pH meter calibration.
a. Buffer Solutions
b. QC Solutions
c. pH solutions
d. None of the above.
A
89
Type of quality-control sample used to evaluate the effects of sample matrices on the performance of an analytical method
a. Matrix Duplicate
b. Matrix Spike
c. Method Blank
d. Reagent Blank
B
90
Component of error which, in the course of a number of analyses of the same measurand, remains constant or varies in a predictable way.
a. Random Error
b. Analyst’s Error
c. Systematic Error
d. Uncertainty
C
91
It is a pure dry solid substance of known chemical composition used in the direct standardization of solution.
a. primary standard
b. secondary standard
c. analytical standard
d. indicator
A
92
It is the closeness of the agreement between the result of a measured value and a true value.
a. Accuracy
b. Precision
c. Mean
d. Error
A
93
Sample preparation technique used prior to instrumental analysis of metals.
a. acid digestion
b. liquid-liquid extraction
c. sieving
d. clean-up
A
94
Which of the following chemicals may be used to neutralize waste containing caustic soda?
a. Potassium Hydroxide
b. Ammonia
c. Hydrochloric Acid
d. Buffer 10 Solution
C
95
Which of the following are possible routes of exposure of the hazardous effect of waste?
a. Inhalation
b. Dermal
c. Ingestion
d. all of the above
D
96
According to Revised DAO 04-36, the appropriate waste labels shall include:
a. Volume of Waste
b. Generator ID Number
c. Container Material
d. All of the above
D
97
Sampling type that eliminates questions of bias in selection
a. composite
b. stratified
c. systematic
d. random
D
98
Reliability of the results decreases with a decrease in the level or concentration of the:
a. matrix
b. analyte
c. reactant
d. product
B
99
Properties of nitric acid making it the preferred acid for digesting samples for the analysis of metals.
a. acts as a strong acid
b. as an oxidizing agent
c. does not form insoluble compounds with metals/nonmetals
d. All of the above
D
100
Possible sources of contamination during sample preparation include:
a. Reagents (tracers)
b. Glassware/equipment
c. Cross-contamination between high- and low-activity samples
d. All of the above
D
101
The size of the sample taken for analysis depends on the concentration of the
a. analyte
b. equipment to be used
c. specific tests
d. All of the above
D
102
Locating the adulterated portion of the lot for sampling is an example of
a. random sampling
b. selective sampling
c. composite sampling
d. stratified sampling
B
103
Quantitative chemical analysis of weighing a sample, usually of a separated and dried precipitate.
a. Titrimetric analysis
b. Volumetric analysis
c. Gravimetric analysis
d. Elemental analysis
C
104
The substance which does the dissolving and must be greater than 50% of the solution.
a. solvent
b. solute
c. mixture
d. solution
A
105
Requirements of a primary standard.
a. High Purity, 99.9% or better
b. Stability in air
c. Absence of hydrate water
d. All of the above
D
106
Used for vacuum filtration using filter paper.
a. gooch crucible
b. Buchner funnel
c. rotary evaporator
d. rubber aspirator
B
107
In chromatography, ________ is carried out on glass plates or strips of plastic or metal coated on one side with a thin layer of adsorbent.
a. HPLC
b. GC
c. Paper Chromatography
d. Thin Layer Chromatography
D
108
Chromatography is used to
a. Separate two or more compounds based on their polarities.
b. Separate two or more compounds based on their masses.
c. Separate two or more compounds based on how strongly they interact with other
d. compounds.
e. all of the above
E
109
A technique for separating mixtures into their components in order to analyze, identify, purify, and/or quantify the mixture or components.
a. Spectroscopy
b. Chromatography
c. Gravimetry
d. Titrimetry
B
110
A graph showing the detectors response as a function of elution time : band’s shapes, position, resolution
a. monitor display
b. quality control chart
c. calibration curve
d. chromatogram
D
111
Under the Bronsted concept of acids and bases, a base is
a. a proton donor
b. a proton acceptor
c. a hydroxide donor
d. an electron pair donor
B
112
Which of the following is NOT an acid-base conjugate pair?
a. HCN and CN−
b. H2O and OH−
c. H2S and OH−
d. NH3 and NH4+
C
113
Predict the products of the following acid-base reaction:
NH3(aq) + HNO3(aq) →
a. NH2OH(aq) + HNO2(aq)
b. NH4NO3(aq)
c. NH4OH(aq)
d. no reaction takes place
B
114
Which of the following is not a common method used for purification?
a. Sublimation
b. Crystallisation
c. Electrolysis
d. Chromatography
C
115
The solution of impure compound and solvent is concentrated to get ____________
a. Unsaturated solution
b. Undersaturated solution
c. Saturated solution
d. Oversaturated solution
C
116
Insoluble impurities from solution during crystallization are removed by ____________
a. Drying
b. Filtration
c. Heating
d. Cooling
B
117
Crystal phases can be interconverted by varying ____________
a. Temperature
b. Pressure
c. Size
d. Viscosity
A
118
Which of the following is not separated through distillation process?
a. Acetone and water
b. Aniline and chloroform
c. Impurities in seawater
d. Milk and water
D
119
Column chromatography is based on the principle of _______________ (this question appeared twice)
a. Ion-exchange
b. Exclusion principle
c. Differential adsorption
d. Absorption
C
120
Select the correct statement from the following options.
a. The lesser the polarity of solute, more strongly it will be adsorbed on a polar surface
b. The greater the polarity of solute, more weakly it will be adsorbed on a polar surface
c. The greater the polarity of solute, more strongly it will be adsorbed on a polar surface
d. All of the mentioned option
C
121
The elution power of a solvent is determined by ____________
a. Its overall polarity
b. The polarity of the stationary phase
c. The nature of the sample components
d. All of the mentioned
D
122
The principle on which thin layer chromatography is based is that the ____________
a. Different compounds are absorbed on an absorbent to different degrees b. Different compounds are absorbed on an absorbent to same degrees
c. Different compounds are adsorbed on an adsorbent to different degrees
d. Different compounds are absorbed on an absorbent to same degrees
C
123
Which type of chromatography is used for the structural analysis?
a. Column chromatography
b. Paper chromatography
c. Partition chromatography
d. Affinity chromatography
B
124
Affinity chromatography is used for the analysis and isolation of ____________
a. Insoluble starch substances
b. Enzyme tyrosinase
c. Antibodies bound with a covalently-attached antigen on cellulose column
d. All of the mentioned
D
125
Which of the following is not an application of high performance liquid chromatography?
a. Analysis of proteins, drugs and explosives
b. Separation of pharmaceutical drugs c. Elimination of undesirable substances from blood
d. Separation of lipids, fatty acids and steroids
C
126
Which of the following is the application of ion exchange chromatography?
a. The softening of hard water
b. The demineralisation of water
c. The separation and determination of anions
d. All of the mentioned
D
127
The quantitative analysis is done using ____________
a. Ion exchange chromatography
b. Thin layer chromatography
c. Gas chromatography
d. Liquid chromatography
C
128
The temperature at which solid and liquid coexist in equilibrium is called ____________
a. Melting point of liquid
b. Freezing point of liquid
c. Freezing point of solid
d. All of the mentioned
B
129
The analysis of electromagnetic radiation scattered, absorbed or emitted by the molecule is called __________
a. Kaleidoscopy
b. Astronomy
c. Spectroscopy
d. Anatomy
C
130
The different types of energies associated with a molecule are __________
a. Electronic energy
b. Vibrational energy
c. Rotational energy
d. All of the mentioned
D
131
Select the correct statement from the following option.
a. Spectroscopic methods require less time and more amount of sample than classical methods
b. Spectroscopic methods require more time and more amount of sample than classical methods
c. Spectroscopic methods require less time and less amount of sample than classical methods
d. Spectroscopic methods require more time and less amount of sample than classical methods
C
132
Which of the following is not in the infrared spectrum?
a. HCl
b. H2O
c. CO2
d. CH4
D
133
The components of the mixture in column chromatography are eluted in order of
a. increasing polarity and increasing distribution ratio.
b. increasing polarity and decreasing distribution ratio.
c. decreasing polarity and increasing distribution ratio.
d. decreasing polarity and decreasing distribution ratio
A
134
An industrial source of alcohol.
a. Coal
b. Fats
c. Sugar
d. Ether
C
135
A 22/24 stopper is used in a volumetric flask. Which of the following is true? (Same concept as this).
a. The diameter is 24 cm and the height is 22 cm.
b. The diameter is 22 cm and the height is 24 cm.
c. The diameter is 24 mm and the height is 22 mm.
d. The diameter is 22 mm and the height is 24 mm
D
136
This type of glass is commonly used for laboratory glassware.
a. Amber
b. Quartz
c. Fused silica
d. Borosilicate
D
137
In the analysis of a mixture by ga s chromatography, which of the following gives the best clue as to whether the components can be analysed with any degree of accuracy? (Same concept)
a. Column length
b. Retention times
c. Column temperature
d. Flow rate of the carrier gas
B
138
The determination of the equilibrium constant of a colored species can be done via which technique?
a. Conductance
b. Ion-exchange
c. Electrophoresis
d. Spectrophotometry
D
139
Why is there a need to separate halogenated waste from non-halogenated waste?
a. Halogenated waste disposal is more costly.
b. Non-halogenated wastes are more toxic.
c. They are not compatible.
d. They will react.
A
140
Organic peroxides are dangerous when
a. Heated
b. Concentrated
c. Let ether, p-dioxane, THF, among others to vaporize
d. All of the above
D
141
Which of the following can be disposed down the drain?
a. 1 g/L PCl5
b. 1 M H2SO4
c. 200 g/L PCl5
d. None of the above
D
142
This quality system standard is a general requirement for the competence of testing and calibration laboratories.
a. GLP
b. GMP
c. ISO 9000
d. ISO/IEC 17025:2005
D
143
In an ideal gas of volume V and temp T. What happens to T when volume is doubled under constant P?
a. Increases
b. Halved
c. Remains the same
d. Doubled
D
144
Water is a good solvent for benzoic acid recrystallization.what is the correct preparation of benzoic solution for recrystallization.
a. Add benzoic acid to minimum hot water with stirring
b. Add room temp water to benzoic while stirring until dissolved
c. Add maximum hot water to benzoic acid while stirring
d. Add small.portions of hot water to benzoic acid while stirring. Until dissolved
D
145
What type of reactions is hydrogen peroxide to water and oxygen?
a. Decomposition
b. Replacement
c. Synthesis
d. Combustion
A
146
How to balance H2O → O2 + H2
a. Change the coefficient of O2 to 2 b. Change the coefficient of H2 to 2
c. Change the coefficients of both H2O and H2
d. Change the coefficients of both H2O and O2 to 1/2
C
147
According to NFPA, what color refers to flammability.
a. Blue
b. Red
c. Yellow
d. White
B
148
A solution is _______ if more solute can dissolve in it.
a. saturated
b. supersaturated
c. unsaturated
d. concentrated
C
149
Solutions of metals and salts are ______
a. Insulator
b. Conductor
c. Polar
d. Negative
B
150
The process in which the relationship of the analytical response and the concentration of the analyte is established.
A. Calibration
B. Standardization
C. Correlation analysis
D. Normalization
A
151
Which of the following will cause the mass of the metal block to increase?
A. Putting the block in a freezer
B. Heating the block
C. Measuring the mass of the block in Jupiter
D. None of the above
D
152
Presence of a functional group in a compound can be established by using:
a. Chromatography
b. IR Spectroscopy
c. Mass Spectroscopy
d. X Ray diffraction
B
153
The gas-solid chromatography is ____________ chromatography as per basic principle involved
a. Exclusion
b. Ion exchange
c. Adsorption
d. Absorption
C
154
What is the advantage of using ground glass joints when carrying out a chemical reaction?
a. no purities are introduced in the reactions from corks or rubber stopper b. all joints are interchangeable and a good fit is assured
c. glassware apparatus can easily be assembled
d. All of the above
D????
155
A compound is known to decompose at its boiling point, which of the following methods can be used to purify this substance
a. Simple distillation
b. vacuum distillation
c. liquid-liquid extraction
d. fractional distillation
e. steam distillation
E
156
The concentration of a solution is known to be 0.101 M. A student determines the concentration to be 0.088 M, 0.087 M, and 0.089 M for each titration performed. Which of the following best describes these results?
Choose one answer.
A. The results are accurate but not precise.
B. The results are precise but not accurate
C. The results are neither accurate nor precise.
D. The results are both accurate and precise.
E. The results are not enough information is given to determine accuracy or precision.
B
157
When performing calculations for standard additions, which of the following must be true?
A. The volume of the standard added must be added with the volume of the sample used to give a new sample volume.
B. The volume of the standard added is subtracted from the total volume of the sample used.
C. The volume of the standard added can be ignored, because it is so small.
D. The volume of the standard added can be ignored, because volumes are not used in the calculations.
E. The volume of the standard added can be ignored, because it is part of the blank correction.
A
158
Which of the following statements about the sensitivity of an analytical method is true?
A. The sensitivity of an analytical method is the same as its detection limit.
B. The sensitivity of an analytical method is a measure of ability to determine whether slight differences in experimental results are significant.
C. The sensitivity of an analytical method is the smallest amount of analyte that the instrument is able to measure.
D. The sensitivity of an analytical method is the response of the instrument to human error.
E. None of the above
B
159
Which of the following statements is true of the detection limit of an instrument?
A. The detection limit of an instrument is the same as its sensitivity.
B. The detection limit of an instrument is a measure of ability to determine whether slight differences in experimental results are significant.
C. The detection limit of an instrument is the smallest amount of analyte that the instrument is able to measure.
D. The detection limit of an instrument is the ability of the instrument to respond to an error.
E. None of the above
C
160
Fill in the blank. Precipitation, volatilization, and particulation are all types of ____________________.
A. Electrochemical analysis methods
B. Gravimetric analysis methods
C. Tritrimetric analysis methods
D. Spectroscopic analysis methods
E. Photochemical analysis methods
B
161
Fill in the blank. Gravimetric analysis relies heavily on the principle of __________________.
A. Conservation of energy
B. Conservation of mass
C. Constant compostition
D. Definite proportions
E. The law of gravity
B
162
Volatilization gravimetry would be most useful in determining which of the following?
A. The amount of silver in a solution of silver nitrate
B. The acidity of a water sample
C. The amount of water in eposom salts
D. All of the above
E. None of the above
C
163
Which of the following statements about the equivalence point of an acid-base titration is true?
A. The equivalence point of an acid-base titration is the same as the indicator endpoint.
B. The equivalence point of an acid-base titration is the point where there is an equivalent amount of titrant and titrand.
C. The equivalence point of an acid-base titration is where the pH = 7.0 (neutral).
D. The equivalence point of an acid-base titration is where the entire volume of the buret has been used.
E. The equivalence point of an acid-base titration is the average value of the dissociation constants.
B
164
Which variable in Beer's law represents how well a chemical species absorbs light at a given wavelength?
A. c - concentration
B. ε - molar absorptivity coefficient
C. A - absorbance
D. b - path length of the sample
E. λ - wavelength
B
165
According to Beer's Law, what happens to the absorbance reading if the concentration of the solution is halved?
A. The absorbance will double.
B. The absorbance will quadruple.
C. The absorbance will be halved.
D. The absorbance will be quartered.
E. There is no way to tell, because concentration and absorbance are not a linear relationship.
C
166
Why must solutions with high concentrations be diluted prior to analysis via Beer's Law?
A. The relationship between absorbance and concentration is not linear at high concentrations.
B. The detector will reach its detection threshhold.
C. The photon source is too weak to provide accurate results.
D. The molar absorptivity of a compound is dependent on its concentration.
E. There is no need to work with dilute concentrations; any concentration will work.
A
167
Which of the following is the correct order in which light passes through a UV-Vis spectrometer?
A. Detector, sample, source, monochromator
B. Source, monochromator, sample, detector
C. Source, sample, monochromator, detector
D. Monochromator, source, sample, detector
E. Sample, source, monochromator, detector
B
168
What is the purpose of a monochromator?
A. To remove stray light from the room
B. To serve as a polychromatic light source
C. To interpret the photon signal into a digital readout
D. To allow only light of a certain wavelength to pass from the source to the sample
E. To focus light from the sample onto the detector
D
169
The method of continuous variations, also known as Job's method, uses the intersection of the ligand-line and the metal-line to determine which of the following?
A. The concentration at which the detector can no longer respond to the signal
B. The mole ratio between the metal and ligand in a complex
C. The maximum intensity of source photons transmitted
D. The number of dimeric molecules formed
E. The oxidation number of the metal
B
170
Ultraviolet and visible radiation affect which of the following?
A. Core electrons
B. Valence electrons
C. Nuclear spin
D. Molecular vibrations
E. Molecular rotations
B
171
Infrared radiation affects which of the following?
A. Core electrons
B. Valence electrons
C. Molecular vibrations
D. Molecular rotations
E. Nuclear spin
C
172
Complete the sentence. All of the following are used to describe the bending modes in infrared spectroscopy, EXCEPT:
A. In-plane rocking.
B. In-plane scissoring.
C. Assymetric stretching.
D. Out-of-plane twisting.
E. Out-of-plane wagging.
C
173
What is the advantage of using a silver chloride sample cell rather than a sodium chloride sample cell for IR spectroscopy?
A. Aquesous samples can be measured; AgCl is not water soluble.
B. There is no advantage.
C. Silver chloride does not absorb IR radiation.
D. Silver chloride is translucent.
E. Sodium chloride is less expensive.
A
174
Complete the sentence. All of the following are infrared sources, EXCEPT:
A. The Nernst glower.
B. The Globar source.
C. An incandescent wire.
D. A pyroelectric glower.
D
175
Fill in the blank. The relationship between the analyte concentration and the intensity of measured radiation from thermal excitation methods, such as a flame or plasma, is ________________.
A. Linear
B. Exponential
C. Parabolic
D. Polynomial
E. Asymptopic
A
176
Flame atomic absorption measures absorption of radiation of analytes in which phase?
A. Solid phase
B. Liquid (neat) phase
C. Gas phase
D. Aquesous phase
E. Plasma phase
C
177
Why is a hollow cathode tube lamp necessary in atomic absorption?
A. Because cathode lamps are cheaper to operate and maintain
B. Because continuous spectrum lamps do not emit at the proper intensity
C. Because the width of an atom's absorption band is narrow
D. Because continuous spectrum lamps cause ionization of the molecules
E. All of the above
C
178
Fill in the blank. Background correction in flame atomic absorption spectroscopy can minimize the effect of ___________________.
A. Ionization of the analyte
B. Scattering and absorption by the matrix of the analyte
C. Reactions between the analyte and matrix
D. Non-volatilization of the analyte
B
