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 sulphide is yellow in colour. HgS PbS CdS SnS
2 Which of the following chloride is soluble in hot water. Hg2Cl2 AgCl PbCl2 All above
3 NH4OH in the presence of H2S is used as a group reagent for which of the following group. Group I Group II Group III Group IV
4 Which of the following group reagent is used for III group of basic radical. Dilute HCl H2S + HCl NH4OH + NH4Cl NH4OH + H2S
5 Which of the following radical is a member of VI group. Mg<sup>2+</sup> Na+ K+ NH<sub>4</sub><sup>+</sup> All above
6 Which of the following radical is not a member of IV group. Mg<sup>2+</sup> Co<sup>2+</sup> Ni<sup>2+</sup> Mn<sup>2+</sup>
7 Which of the following radical is not a member of III group Al<sup>3+</sup> Fe<sup>2+</sup> Ca<sup>2+</sup> Fe<sup>3+</sup>
8 Which of the following radical is not a member of II group. Cu<sup>2+</sup> Cd<sup>2+</sup> Ba<sup>3+</sup> K+
9 Which of the following is not an acid radical Cl- Br- K+ I-
10 Which of the following species is not a basic radical. Ag+ Cl- Ba2+ K+
11 Which of the following is not a physical test. Colour test Flame test Beed test Wet test
12 Yellow green flame is observed with Calcium salt Barium salt Strontium salt Sodium salt
13 Dull red flame is observed with Calcium salt Barium salt Strontium salt Sodium salt
14 Yellow colour of the flame is observed with Calcium salt Barium salt Sodium salt Potassium salt
15 Which of the following methods is used in qualitativ eanalysis. Physical method Chemical method Instrumental method All above
16 Which of the following combination is used to make buffer. NaOH and HCl KOH and H2SO4 CH3COOH and CH3COONa CH3COOH and NH4OH
17 The pH of 0.01 N NaOH is. 12 13 14 11
18 The pH of 0.001 N HCl is 1 2 3 4
19 It has been observed that if one goes on adding KNO3 solution to a precipitate of AgCl the solubility of these precipitates goes on increasing with increasing concentration of K+ and NO3= ions which are not common to AgCl This is due to which effect. Divers ion effect Uncommon ion effect Activity effect All above
20 It is known that AgCl is insoluble in HNO3 but dissolves readily in NH4OH solution .Which of the following statement is not correct. Ag ion reacts to form complex with NH4OH solution The concentration of Ag ion decreases Ionic product is less than the solubility product Ionic product is greater than solubility product
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