PPSC Chemistry Part IV Analytical Chemistry Online Test With Answers

PPSC Chemistry Part IV Analytical Chemistry Online Test

Sr. # Questions Answers Choice
1 The digits which are necessary to express the result of a measurement to the precision with which the measurement is made are called. Non significant figures Mathematical figures Significant figures Reagent errors
2 Which of the following term refers to nearness between several measurements of the same quantity. Accuracy Precision Standard error Standard error of mean
3 The term accuracy refers to how near the observed value is to. Mean value Low value True value Standard value Both C and D
4 Which of the following steps is involved in quantitative analysis. Sampling Conversion of the desired constituent into a suitable form per analysis. Measurement of some physical or chemicals property, on which the determination is based. All above steps
5 A trace constituent is one whose amount in the sample is. < 10% < 010% < 1.0% < 0.01 %
6 A minor constant is one whose amount in the sample is 0.1 to 1 % 0.01 to 1% 1 to 10% None of the above
7 A major constituent of materials one whose amount in the materials is 1% or more 0.1% 0.01% 0.001 %
8 Which of the following range is correct for macro analysis. Minimum 100 mg Minimum 10 mg Minimum 1 mg Minimum 1000 mg
9 Which of the following quantity is correct for micro analysis. 1 -10 mg or < 50 ml 10-20 mg or > 50 mL 50-100 mg or < 100 mL None of above
10 Which of the following steps is not involved in chemical analysis. Separation of sample in pure form Separation of the sample in the mixture form Preparation of sample for the analyisis Validity of experimental results
11 Which of the following technique is not related to instrumental analysis. Optical method Colorimetry Polarography Gravimetric analysis
12 Which of the following methods is chemical in nature. Acid bas titration Redox titration Complexometric titration All above methods
13 Which of the following method is used to separate small molecules form the larges molecules from the larger molecules in diffusing through a membrane. Dialysis HPLC FPLC TLC
14 Which of the following technique is used to separate substance of high molecular weight of different charges. Dialysis Electrophoresis Solvent None of the abvoe
15 Which of the following analytical technique is used for separating similar substance by preferential adsorption or partition between two phases. Distillation Dialysis Chromatography Solvent extraction
16 Which of the following analytical method is used for the separation of dissolved components from solutions. Chromatography Dialysis Solvent extraction Distillation
17 Which of the following methods is the most common method for separation of liquid components from a mixture. Dialysis Solvent extraction Precipitation Distillation
18 Which of the following technique is based on deposition of the analyte at appropriate electrode by the passage of the electric current. Chromatography Dialysis Electrodeposition Solvent extraction
19 Which of the following method is based on the solubility difference between the analyte and the unwanted components. Distillation Complex formation Electrodepostion Precipitation
20 Which of the following analytical technique is used for the separation of an interfering substance or analyte from the mixture. Precipitation Distillation Electrode position All above these
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