PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 Which of the following is not an adsorption indicator. Eosin Bromocrsol green Fluorescein Phenolphthalein
2 Which of the following is not an organic precipitating agent. Diemethglyoxime Cuperon Oxime Acetate
3 Which of the following anionic species is not separated by gravimetric analysis. Cl- SO4 CH3COO- PO4
4 Which of the following metal ion cannot be catimated by gravimetric analysis. K+ Ca<sup>2+</sup> Al3+ Zn2+
5 Which of the following analytical techniques can be used to extract metal ion chelates. Solvent extractions Evaporation GC Distillation
6 Which of the following is not a ligand or complexing agent. NH3 CH3COOH EDTA CN-
7 The number of bonds formed by the central atom is called its. Valence number Complex number Coordination number Avogadro's number
8 Which of the following species is determined by complex metric titrations. K+ Na+ Ca+ Cl-
9 Complexing reactions are useful for which of the following method of analysis Gravimetry Spectrophotometry Interfering ions masking All of the above
10 Amino acids are are important in biochemistry which of the following statements is not correct regarding amino acids. 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.
11 Which of the following is the best indicator for titration of NH4OH with HCl. Methyl red Methyl orange Eosin Phenolphthalein
12 Which of the following is the best indicator for titration of CH3COH with NaOH Methyl orange Methyl red Phenophthalein Eosin
13 When CH3COOH is titrated against NaOH the pH as the equivalence point is. 7 &gt; 7 o<div>&gt;7</div> 6.8
14 When HCl is titrated against NaOH , the pH at the equivalence point is. zero &gt; 7 &lt; 7 14
15 An indicator for an acid base titration is a Weak acid Weak base Strong acid Strong base Both A and B
16 The point at which the reaction is observed to be complete is called. The equivalence point The end point The triplet point The equilibrium point
17 An acid base titration involves a neutralization reaction in which an acid is reacted with an equivalent amount of base The titrant is always a strong acid or base The analyte may be Strong acid Strong base Weak acid and Weak base All above
18 Which of the following is not a component of HPLC system. Pumps Columns Particle collector Injection system.
19 Which of the following functional groups is not involved in ion exchange chromatography. Weak acids Strong acids Strong bases Carbohydrates
20 Which of the following statement is not related with the advantages of TLC. A variety of adsorbents can be used The thickness of adsorbent can be varied Fluorescence can be introduced Different detectors can be used
21 Which of the following materials is not suitable as adsorbent for chromatography. Silica gel Activated charocal Alumina Calciu7m chloride
22 Which of the following techniques is capable of seperating minute quantities of the substances in a relatively short times with high resolutions. Gel electrophoresis Capillary electrophoresis GC HPLC
23 Which of the following technique is used to separate substance based on their charge to mass ratio. HPLC HPTLC GC Electrophoresis
24 Which of the following detector is used in HPLC system. Differential refractometer detector UV detector Diode array detector All above
25 Which of the following detector is used for compounds containing electronegative atoms. Mass specdtrometer ECD TCD UV-detector
26 Which of the following detector is used in GC analysis Thermal conductivity detector Flame ionization detector Mass spectrometer All above
27 A well packed column may hve 100 plates /m 1000 plates /m 10 plates /m 10,000 plates/m
28 Which of the following information is correct about a typical packed column in GC. 10-100 m long and 2 to 6 cm to diameter 1-10 m long and 0.2 to 0.6 cm in diameter 0.1-1 m long and 0.02 to 0.00 cm in diameter None of the above
29 Which of the following gas is not used as carrier gas in GC. Argon Nitrogen Helium CO2
30 Which of the following is not a component of a gas chromatography system. Carrier gas Capillary column Packed column Cathode lamp
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