PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 The instrument used for measuring fluorescence is known as. Fluorimeter Potentiometer Flame photometer Mass spectrometer
2 Which of the following technique is most sanative one. Photomerty AAS Flame photometry Flourimetry
3 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
4 Which of the following mixture is used as most popular flame in AAS. Acetylene air Acetylene O2 Hydrogen air Hydrogen O2
5 Which of the following is not a component of AAS. Hollow cathode lamp Burner Detector Tungsten lamp
6 Which of the following is not a component of hollow cathode lamp. Anode Cathode Filter gas Atomic vapour
7 The light source in AAS used is UV light Visible light Radio waved Hollow cathode lamp
8 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
9 Beer's law is followed in Flame photometry Atomic absorption spectrophotometry Mass spectrometry Potentiometry
10 Which of the following element is usually determined by flame photometry. Li Na K All above elements
11 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.
12 Which of the following statements is not correct with respect to errors in flame photometry. Errors rising form the phenomena developed in the Hollow cathode lamp Background effect Errors arising from test element itself Spectral interference
13 Which of the following is not a component of flame photometer. Pressure regulator and flow meter The atomizer The burner Hallow cathode lamp
14 Which of the following fuel is used in flame photometry. Hydrogen gas Acetylene gas Methane Propane All above
15 The relative populations of gourd state and excited state populations at a given flame temperature can be estimated using. Boltzmann distribution law Maxwell law Lambertie law Beer's law
16 Which of the following statements is not related with flame photometric analysis. Vaporization of the solvent leaving back the residue Conversion of solid slat to the gaseous state Dissociation of gaseous molecules into free atoms Measurement of the intensity of absorbed tradition
17 The emission of light characteristics of metal and correlation of intensity of the light emitted with concentration of that metal forms the basis of. Roman spectroscopy IR spectroscopy Flame photometry Rotational spectroscopy
18 Which of the following statements is not true with respect to atomic spectroscopy. Atoms are simplest form of matter Atoms cannot rotate or vibrate as molecules do Only electronic transitions within atoms take place Band spectra are observed
19 Which of the following technique has flame as a source of excitation energy. UV spectroscopy I-R spectrocscopy Flame photometry Raman spectroscopy
20 Which of the following analytical technique is not concerned with atomic spectroscopy. Flame photometry Flame emission spectrometry Atomic absorption spectrometry I-R spectrophotometry
21 Which of the following acid radical give organic layer test. Cl- CO3 I S<sup>2-</sup>
22 Which of the following salt is green in colour Mn salt Cr salt Co salt Ba salt
23 A mixture containing S2- and SO4 ions on trating with dil HCl will produce H2S gas SO2 gas H2S and SO2 gas CO
24 Which of the following acid radical gives chromyl chorate test. F- I- Cl- Br-
25 Which of the following hydroxide is getatinous in nature. Fe(OH)3 Al(OH)3 Ca(OH)3 Cr (OH)3
26 Cobalt salt imparts which colour to the borax bead Blue Green Red Yellow
27 Which of the following extract is used for wet tests of acid radicals. Calcium carbonate extract Sodium iodide extract Sodium carbonate extract Ammonium carbonate extract
28 Which of the following acid radical is not interfering. Phosphate Borate Flouride Sulphate
29 Which of the following salt is water insoluble. K2SO4 Na2SO4 BaSO4 None of abvoe
30 Which of the following salt is soluble in water. BaCO3 SrCO3 CaCO3 K2CO3
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