PPSC Chemistry Part III Inorganic Chemistry Online Test With Answers

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PPSC Chemistry Part III Inorganic Chemistry Online Test

Sr. # Questions Answers Choice
1 When 0.01 moles of NaOH are added to a buffer solution, its pH changes from 4.745 to 4.832 WHAT IS ITS. 0.115 0.900 0.015 0.215
2 The pH Value 4.2 is of Vinegar Lemons Oranges Tomatoes
3 Glass electrode cannot be used to measure the pH of pure. Acetic acid Ethyl alcohol Gelatin All above
4 A mixture of weak acid and its salt is. Alkaline buffer Acidic buffer Neutral buffer All of above
5 Buffer solution are used to. Increase the pH Resist the pH Decrease the pH None of above
6 The most convenient and has nearest approach to a universal pH measurement pH strips pH indicator The emf method The colorimetric
7 The solution of NaOH pH -10.46 contain [OH-] 2.0 X. 10<sup>-4</sup> 4.6 X 10<sup>-4</sup> 4.6 X 10<sup>-2</sup> 4.6 X 10<sup>-3</sup>
8 The pH of the 0.0032 M H2SO4 is. 3.2 4.0 2.198 1.0
9 The pH of the 1.3 x 10-4 NH4Cl is 1.3 4.0 2.886 3.886
10 The pH of milk is 6.0 6.5 7.0 7.5
11 The pH of the tears is 7.0 7.4 7.8 8.2
12 The concentration of OH- ions in a certain household ammonia solution is 0.0025. This ammonia solution is. Basic Acidic Neutral None of above
13 The value of Kw increase with temperature because the ionization of water. Positive Negative Endothermic Exothermic
14 The ionic product equilibrium constant is. Ka Kb Kc Kw
15 pH of pure water at 25 oC. kw = 1 x 10-4 0 7 14 None of above
16 A chemical reaction resulting in a change in the electric charge on the reacting particles may be called as. Add ion reaction Redox reaction Elimination reaction Chain reaction
17 Relative order of acidity of oxy acid HCIO &gt; HCIO2 &gt; HCIO3 &gt; HCIO4 HCIO4 &gt; HCIO3 &gt;HCIO2 &gt; HCIO HCIO3 &gt; HCIO2 &gt; HCIO &gt; HCIO4 HCIO2 &gt; HCIO4 &gt; HCIO3 &gt; HCIO
18 Relative order of acidity of HF, HCl, HBr, and HI acids is HCl &gt; HBr &gt; HI &gt; HF HF &gt; HCl &gt; HBr &gt; HI HI &gt; HBr &gt; HCl &gt;HF HF &gt; HI &gt; HCl &gt; HBr
19 All the strong acids have very close pKas value and they appear to have nearly equal strengths in aqueous solutions. The phenomenon is called as. Levelling effect Differnetiating effect Levelling solvent Differnetiating solvent
20 The one in which the acceptor atom is of low positive charge, Large size and has several outer electrons which can be easily excited is a. Soft base Hard Base Soft acid Hard acid
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