PPSC Chemistry Part IV Analytical Chemistry Online Test With Answers

PPSC Chemistry Part IV Analytical Chemistry Online Test

Sr. # Questions Answers Choice
1 Which of the following interaction is involved in solid phase extraction technique. Van der Waals forces Dipolar attraction H bonding All of above
2 The most widely used method of extracting metal ions is the formation of a chelate molecule with an organic chelating agent The chelating agents are. Strong acids Strong bases Weak bases Weak acids
3 Which of the following technique is useful to remove metal ions from an interfering matrix. Solvent extraction Electrophorests Cataphorests Gel permeation
4 When a solute is dissolved in two immiscible solvents it will distributes itself between two phases and the ratio of the concentration of the solute in two phases will be constant, This is known as. Starke law Distribution law Equilibrium law Snell's law
5 Which of the following techniques is used to reduce the need for large volumes of organic solvents. Solid phase extraction Gel permeation Electrophoresis TLC
6 Which of the following technique involves the bonding of hydrophobic functional group to solid particle, surface and acts as extracting phase Liquid phase extraction Solid phase extraction Electrophoresis Gel electrophoresis
7 Which of the following techniques involves the distribution of solute between two immiscible liquid phases. Chromatography Electrophoresis Solvent extractions Solid phase extraction
8 Which of the following techniques is used for cleanup of samples prior to introduction into chromatographic column. Paper chromatography TLC Solvnent extraction Solid phase extraction Both C and D
9 Which of the following source is commonly used as excitation source in fluorimeter. Tungsten lamp Mercury vapour lamp Nernst vapur lamp Radio souse
10 The instrument used for measuring fluorescence is known as. Fluorimeter Potentiometer Flame photometer Mass spectrometer
11 Which of the following technique is most sanative one. Photomerty AAS Flame photometry Flourimetry
12 The concentration required to give a signal equal to three times the standard deviation of the baseline is called. Sensitivity Detection limit Signal to noise ratio None of the above
13 Which of the following mixture is used as most popular flame in AAS. Acetylene air Acetylene O2 Hydrogen air Hydrogen O2
14 Which of the following is not a component of AAS. Hollow cathode lamp Burner Detector Tungsten lamp
15 Which of the following is not a component of hollow cathode lamp. Anode Cathode Filter gas Atomic vapour
16 The light source in AAS used is UV light Visible light Radio waved Hollow cathode lamp
17 The absorbance is directly proportional to the path length in the flame and to the concentration of atomic vapor in flame is a statement of. Lambert's law Beer's law Honery's law Starke law
18 Beer's law is followed in Flame photometry Atomic absorption spectrophotometry Mass spectrometry Potentiometry
19 Which of the following element is usually determined by flame photometry. Li Na K All above elements
20 Which of the following statements is not correct with respect to limitations of flame photometry. Low energy of the exciting source Liquid samples are generally used Can be employed for direct detection halides or inert gases It does not provide informatin about the molecular forms of metals.
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