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 salt is colourless. Zn salt Co salt Ni salt Mn salt
2 Which of the following sulphide is yellow in colour. HgS PbS CdS SnS
3 Which of the following chloride is soluble in hot water. Hg2Cl2 AgCl PbCl2 All above
4 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
5 Which of the following group reagent is used for III group of basic radical. Dilute HCl H2S + HCl NH4OH + NH4Cl NH4OH + H2S
6 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
7 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>
8 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>
9 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+
10 Which of the following is not an acid radical Cl- Br- K+ I-
11 Which of the following species is not a basic radical. Ag+ Cl- Ba2+ K+
12 Which of the following is not a physical test. Colour test Flame test Beed test Wet test
13 Yellow green flame is observed with Calcium salt Barium salt Strontium salt Sodium salt
14 Dull red flame is observed with Calcium salt Barium salt Strontium salt Sodium salt
15 Yellow colour of the flame is observed with Calcium salt Barium salt Sodium salt Potassium salt
16 Which of the following methods is used in qualitativ eanalysis. Physical method Chemical method Instrumental method All above
17 Which of the following combination is used to make buffer. NaOH and HCl KOH and H2SO4 CH3COOH and CH3COONa CH3COOH and NH4OH
18 The pH of 0.01 N NaOH is. 12 13 14 11
19 The pH of 0.001 N HCl is 1 2 3 4
20 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
21 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
22 When to a solution of weak electrolyte a strong electrolyte with a common ion is added, the dissociation of weak electrolytes is suppressed . This is known as. Stark effect Salt effect Common ion effect Zeman effect
23 In second group of inorganic qualitative analysis, the S2-ions does not form precipitate with which of the following ions. <sup>Hg2+</sup> Cu<sup>2+</sup> Ai<sup>3+</sup> Cd<sup>3+</sup>
24 Which of the following statement is not correct regarding dissociation constant (Ka)? It is a measure of the tendency of an acid to split up into ions The greater the value of Ka, more is the dissociation It is determined by conductimetric method It is not a proper parameter for weak acids
25 Which of the following is not strong electrolytes. HCl H2SO4 HNO3 CH3COOH
26 Which of the following substance is not weak electrolyte. CH3COOH NH4OH Oxalic Acid NaCl
27 In order to increase the rate of the reaction one should. Increase the concentration of products Decrease the concentration of reactants Decreases the concentration of products Both C and D statement are correct
28 If a chemical reaction in equilibrium is subjected to a change the reaction tends to more in such a direction that the effect of the change would be neutralized This is a statement of. Law of mass action Le Chatlier's principle Henery's law Correspondence principle
29 The equilibrium constant value for a chemical reaction is 5 x 1020which of the following statement is true with respect to this value. Reaction will be reversible Reaction will proceed in backward direction Reaction is at equilibrium Reaction will proceed in the forward direction
30 The rate of a chemical reaction is proportional to the product of the active mean of the reactants, This is a statement of. Law of dynamic equilibrium Le Chatlier's principle Law of mass action Solubility product principle
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