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Online Tests
PPSC Chemistry Part IV Analytical Chemistry Online Test MCQs With Answers
Question # 1
Which of the following radical is not a member of III group
Choose an answer
Al
3+
Fe
2+
Ca
2+
Fe
3+
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Question # 2
Which of the following metal ion cannot be catimated by gravimetric analysis.
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K+
Ca
2+
Al3+
Zn2+
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Question # 3
Which of the following technique is used for separation of volatile components.
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GC
HPLC
FPLC
TLC
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Question # 4
Potentiometry is based on the measurement of which physical property.
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Electrical conductance
Electrical potential
Thermal conductance
Current
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Question # 5
The technique which involves measurement of the changes in conductance of the solution by employing high frequency alternating current in known as.
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Potentiomerty
Polarography
Oscillometry
Conductomerty
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Question # 6
Which of the following mixture is used as most popular flame in AAS.
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Acetylene air
Acetylene O2
Hydrogen air
Hydrogen O2
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Question # 7
The term accuracy refers to how near the observed value is to.
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Mean value
Low value
True value
Standard value
Both C and D
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Question # 8
Deviation in a particular measurement is the difference between the measured value and the average value The arithmetic mean of the different deviations observed in several measurements of the same quantity is known as.
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The standard deviation
The average deviation
Relative mean deviation
variance
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Question # 9
Which of the following technique has flame as a source of excitation energy.
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UV spectroscopy
I-R spectrocscopy
Flame photometry
Raman spectroscopy
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Question # 10
Which of the following gas is not used as carrier gas in GC.
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Argon
Nitrogen
Helium
CO2
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Question # 11
Which of the following species is very good oxidizing agent.
Choose an answer
MnO
4
H+
Zn
2+
Fe
3+
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Question # 12
An indicator for an acid base titration is a
Choose an answer
Weak acid
Weak base
Strong acid
Strong base
Both A and B
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Question # 13
Which of the following techniques is capable of seperating minute quantities of the substances in a relatively short times with high resolutions.
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Gel electrophoresis
Capillary electrophoresis
GC
HPLC
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Question # 14
Which of the following is the best indicator for titration of NH4OH with HCl.
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Methyl red
Methyl orange
Eosin
Phenolphthalein
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Question # 15
Which of the following methods is the most common method for separation of liquid components from a mixture.
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Dialysis
Solvent extraction
Precipitation
Distillation
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Question # 16
Which of the following quantity is correct for micro analysis.
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1 -10 mg or < 50 ml
10-20 mg or > 50 mL
50-100 mg or < 100 mL
None of above
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Question # 17
The pH of 0.001 N HCl is
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1
2
3
4
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Question # 18
Which of the following electrode is normally used as reference electrode for a potentiometer.
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Platinum electrode
Calomel electrrode
Silver electrode
Copper electrode
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Question # 19
Which of the following is not an adsorption indicator.
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Eosin
Bromocrsol green
Fluorescein
Phenolphthalein
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Question # 20
Amino acids are are important in biochemistry which of the following statements is not correct regarding amino acids.
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These are amphoteric substances tend to undergo internal protein transfer
In aqueous solutions these substances tend to undergo internal proton transfer
These for zwitter ion in aqueous medium
These always contain two amino groups.
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Question # 21
Which of the following physical property forms the basis of radio chemicals methods of analysis.
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Absorption of light
Emission of light
Radioactivity
Thermal conductivity
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