PPSC Chemistry Full Book Test With Answers

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PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 The correct order of reactivity among I , Ii, and III IS. i > ii >iii i > iii > ii II > III > I III > II > I
2 When steam is passed over red bot coke The product formed is Hydrogen and carbon dioxide Mixture of hydrogen and carbon monoxide Mixture of hydrogen and oxygen Heavy hydrogen
3 Which of the following is an allotrops of hydrogen. 0- H2 P-H2 Both A and B None of these
4 Lithum silicide reacts with concentrated hydrochlric acid to give lithium chlride along with. H2 and SI Si H 4 gas Disilane gas Si3H8
5 Aluminium reacts with boiling water to liberatedi hydrogen gas along with the formation of. Aluminium oxide Aluminium hydroxide Aluminium suboxide Aluminium superoxide
6 Which of the following species has highest bond energy. H2 T2 D Cl
7 The three isotopes of hydrogen differ from one another in Atomic number Number of protons Nuclear charge Nuclear mass
8 Hydrogen at the moment of its generation is generally called. Protium Nascent hydrogen Atomic hydorgen Heavy hydrogen
9 Which process of adsorption of hydrogen on palladium is known as. Syneresis Occlusion Diffusion Erosion
10 Which type of elements form ionic hydrides. Transitionelements Metalloids Elements with high electronegativity Elements with high electropositivity.
11 Which pair of species can undergo chemical reaction with each other. CO+ NO LiH and H2O CO2 and HCl CaH2 and SI H4
12 Which metal can produce dihydrogen gas by reaction with dil H2SO4 Ag Fe Cu Pt
13 Atomicity of which of the following pair of elements is not same as hydrogen. Phosphorus, Nitrogen Nitrogen, Argon Nitrogen, iodine Iodine, sulphur
14 Which isotope of hydrogen is radioactive in nature. Protium and deuterium Tritium only Tritium and deuterium Only deuterium
15 According to recent view which is the correct representation of hydrated proton in aqueous solutions. H+ H9O3+ H9O4+ H2O+
16 Which of the following gas is lightest. Dihydrogen Helium Dinitrogen Dioxygen
17 According to systematic nomenclature which hydrogen compound is sulphane. HF Si H4 SF4 H2S
18 In which property listed below hydrogen does not resemble alkali metals. Tendency to form cation Nature of oxide Combination with halogens Reducing character.
19 The name hydrogen was proposed by. Lavoisier Rutherford Henry Cavandish Scheele
20 In which of the following characteristics does hydrogen resemble halogens. Hydrogen is the lightest gas H atoms contains one electron each Hydrogen forms ionic hydrides with alkali metals Hydrogen has three isotopes.
21 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
22 The pH Value 4.2 is of Vinegar Lemons Oranges Tomatoes
23 Glass electrode cannot be used to measure the pH of pure. Acetic acid Ethyl alcohol Gelatin All above
24 A mixture of weak acid and its salt is. Alkaline buffer Acidic buffer Neutral buffer All of above
25 Buffer solution are used to. Increase the pH Resist the pH Decrease the pH None of above
26 The most convenient and has nearest approach to a universal pH measurement pH strips pH indicator The emf method The colorimetric
27 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>
28 The pH of the 0.0032 M H2SO4 is. 3.2 4.0 2.198 1.0
29 The pH of the 1.3 x 10-4 NH4Cl is 1.3 4.0 2.886 3.886
30 The pH of milk is 6.0 6.5 7.0 7.5
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