PPSC Chemistry Full Book Test With Answers

image
image
image

PPSC Chemistry Full Book Test

Sr. # Questions Answers Choice
1 The hybridization of S in SO2 is. sp sp2 sp3 dsp2
2 B.P of heavy water is equal to that of ordinary water greater than that of ordinary water Less than that of ordinary water equal to that of distilled water
3 When a lead a storage battery is discharged . SO2 is evolved PbS is consumed Pb is formed H2SO4 is consumed
4 Pick out the incorrect statement for SO2 It turns filter paper moistened with acidified K2Cr2O7 It turns starch iodate paper blue It does not react with chlorine in presence of charcoal It decolourises acidified KMnO4 solution.
5 Oxalic acid when heated withe conc. H2SO4 it gives out. H2O and CO2 CO and CO2 CO2 and H2S Oxalic sulphate
6 Which among the following is a Talse statement. SO3 is obtained by the catalytic oxidation of SO2 SO3 has trigonal planar geometry in gaseous state SO3 in nauseous state has all S-O bonds equivalent SO3 gas shows more solubility in water than in H2SO4
7 What is the following is incorrect. Water is more polar than H2S H2O2 is a planar molecule Heavy water is produced by the exhauative electrolysis of water made acidic H2O2 act both as oxidising as well as reducing agent in acidic medium
8 Pick out the incorrect statement regarding ozone. O3 is an unstbale dark blue diamagnetic gas The central oxygen in O3 is sp3 hybridized It cause the tailing of mercury It does not react with KOH
9 Which of the following is not true of ozone. It is a strong electilizing agent It attacks organic compounds containing carbon carbon double bond Its molecular is linear and has two different O-O bond lengths It is more powerful oxidising agent at molecular oxygen
10 Which of the following reactions is employed to produce ozone in the laboratory. Exposure of air to UV light Reaction of F2 with H2O at low temperature Reaction SO2 with H2O2 Passage of silent electric discharge through oxygen
11 O2 molecule is. Fermagnetic Forromagnetic Paramagnetic Diamagnetic
12 Black and white photographic film contain small grains of. Silver bromide Silver cholride Silver iodide Any of above
13 Perdisulphuric acid is. Marshal acid Caro acid None of above Any of above
14 H2SO4 is used In the preparation of aqua regia In the purification of gold and silver In the dental filling None of above
15 The specific gravity of H2SO4 is 1.37 1.84 1.17 1.57
16 The contact process is mainly used when acid is required for the manufactures of. Explosives Fine chemicals Lead accumulators All above
17 The H2SO4 obtained by the contact process having purity 70% 74% 78% 82%
18 Gases and dust particles are removed from H2SO4 by Tydal effect Drying tower Absorption tower Contact converter
19 The commonly used catalyst in the manufacture of H2SO4 Fe2O3 with a little CuO v2O5 Platinized asbestos and MgSO4 All above
20 H2SO4 is manufactured by The lead chamber process The contact process Both A and B The Ostwald's process
21 H2SO4 acts as gent Reducing Oxidizing Both A and B None of above
22 A thionic acid H2S2O3 H2S2O6 H2S2O8 H2S2O7
23 Is a peroxy acid H2SO5 H2S2O6 H2SO4 H2S2O7
24 SO3 exists in form a -so3 b-SO3 gama SO3 All above
25 The structure of SO2 is Linear Angular V-shaped Planner
26 SO2 acts as Lewis base Lewis acid Botha A and B None of above
27 The formula of sulphur sesquioxide SO4 S2O7 S2O3 SO3
28 Molecule of oxygen is Diamagnetic Paramagnetic Both A and B None of above
29 Oxygen and sulphur exist in state Free Combined <sub>Both free &amp; combined</sub> None of above
30 Electronegativity of oxygen is. 2,5 3,5 2,4 2.1
Download This Set

Is this page helpful?

×