[{"id":208054,"question":"Which of the following interaction is involved in solid phase extraction technique.","choices":[{"text":"Van der Waals forces","value":"A"},{"text":"Dipolar attraction","value":"B"},{"text":"H bonding","value":"C"},{"text":"All of above","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":208053,"question":"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.","choices":[{"text":"Strong acids","value":"A"},{"text":"Strong bases","value":"B"},{"text":"Weak bases","value":"C"},{"text":"Weak acids","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":208052,"question":"Which of the following technique is useful to remove metal ions from an interfering matrix.","choices":[{"text":"Solvent extraction","value":"A"},{"text":"Electrophorests","value":"B"},{"text":"Cataphorests","value":"C"},{"text":"Gel permeation","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":208051,"question":"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.","choices":[{"text":"Starke law","value":"A"},{"text":"Distribution law","value":"B"},{"text":"Equilibrium law","value":"C"},{"text":"Snell's law","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":208050,"question":"Which of the following techniques is used to reduce the need for large volumes of organic solvents.","choices":[{"text":"Solid phase extraction","value":"A"},{"text":"Gel permeation","value":"B"},{"text":"Electrophoresis","value":"C"},{"text":"TLC","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":208049,"question":"Which of the following technique involves the bonding of hydrophobic functional group to solid particle, surface and acts as extracting phase","choices":[{"text":"Liquid phase extraction","value":"A"},{"text":"Solid phase extraction","value":"B"},{"text":"Electrophoresis","value":"C"},{"text":"Gel electrophoresis","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":208048,"question":"Which of the following techniques involves the distribution of solute between two immiscible liquid phases.","choices":[{"text":"Chromatography","value":"A"},{"text":"Electrophoresis","value":"B"},{"text":"Solvent extractions","value":"C"},{"text":"Solid phase extraction","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":208047,"question":"Which of the following techniques is used for cleanup of samples prior to introduction into chromatographic column.","choices":[{"text":"Paper chromatography","value":"A"},{"text":"TLC","value":"B"},{"text":"Solvnent extraction","value":"C"},{"text":"Solid phase extraction","value":"D"},{"text":"Both C and D","value":"E"}],"correctAnswer":5},{"id":208046,"question":"Which of the following source is commonly used as excitation source in fluorimeter.","choices":[{"text":"Tungsten lamp","value":"A"},{"text":"Mercury vapour lamp","value":"B"},{"text":"Nernst vapur lamp","value":"C"},{"text":"Radio souse","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":208045,"question":"The instrument used for measuring fluorescence is known as.","choices":[{"text":"Fluorimeter","value":"A"},{"text":"Potentiometer","value":"B"},{"text":"Flame photometer","value":"C"},{"text":"Mass spectrometer","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":208044,"question":"Which of the following technique is most sanative one.","choices":[{"text":"Photomerty","value":"A"},{"text":"AAS","value":"B"},{"text":"Flame photometry","value":"C"},{"text":"Flourimetry","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":208043,"question":"The concentration required to give a signal equal to three times the standard deviation of the baseline is called.","choices":[{"text":"Sensitivity","value":"A"},{"text":"Detection limit","value":"B"},{"text":"Signal to noise ratio","value":"C"},{"text":"None of the above","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":208042,"question":"Which of the following mixture is used as most popular flame in AAS.","choices":[{"text":"Acetylene air","value":"A"},{"text":"Acetylene O2","value":"B"},{"text":"Hydrogen air","value":"C"},{"text":"Hydrogen O2","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":208041,"question":"Which of the following is not a component of AAS.","choices":[{"text":"Hollow cathode lamp","value":"A"},{"text":"Burner","value":"B"},{"text":"Detector","value":"C"},{"text":"Tungsten lamp","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":208040,"question":"Which of the following is not a component of hollow cathode lamp.","choices":[{"text":"Anode","value":"A"},{"text":"Cathode","value":"B"},{"text":"Filter gas","value":"C"},{"text":"Atomic vapour","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":208039,"question":"The light source in AAS used is","choices":[{"text":"UV light","value":"A"},{"text":"Visible light","value":"B"},{"text":"Radio waved","value":"C"},{"text":"Hollow cathode lamp","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":208038,"question":"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.","choices":[{"text":"Lambert's law","value":"A"},{"text":"Beer's law","value":"B"},{"text":"Honery's law","value":"C"},{"text":"Starke law","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":208037,"question":"Beer's law is followed in","choices":[{"text":"Flame photometry","value":"A"},{"text":"Atomic absorption spectrophotometry","value":"B"},{"text":"Mass spectrometry","value":"C"},{"text":"Potentiometry","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":208036,"question":"Which of the following element is usually determined by flame photometry.","choices":[{"text":"Li","value":"A"},{"text":"Na","value":"B"},{"text":"K","value":"C"},{"text":"All above elements","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":208035,"question":"Which of the following statements is not correct with respect to limitations of flame photometry.","choices":[{"text":"Low energy of the exciting source","value":"A"},{"text":"Liquid samples are generally used","value":"B"},{"text":"Can be employed for direct detection halides or inert gases","value":"C"},{"text":"It does not provide informatin about the molecular forms of metals.","value":"D"},{"value":"E"}],"correctAnswer":3}]