PPSC Chemistry Part III Inorganic Chemistry Online Test With Answers

image
image
image

PPSC Chemistry Part III Inorganic Chemistry Online Test

Sr. # Questions Answers Choice
1 The high oxidizing power of halogens is favored by. Low heat od dissociation of X2 A high electron affinity of the atom A higher hydration energy of the ion All of above
2 Has the highest value of electronegativity F Cl Br I
3 All halogens exist as covalent molecules. Monoatomic Daitomic Triatonic Tetra atomic
4 Group VII A of periodic table consist of elements. 4 <div>5</div> 6 7
5 A boy accidently splashes a few drops of conc. H2SO4 on his cotton shirt. A few minutes later, the splashed part blacken and holes appear.This is because the sulphuric acid. Heats up the cotton so that it burns Dehydrates the cotton Causes cotton to react with oxygen of the air Removes the elements of water from cotton
6 Pick out the ideal conditions needed for the manufacture of H2SO4 by contact process. Low temperature high pressure and high concentration of reactants Low temperature , low concentration of reactants and low pressure High temperature high pressure and high concentration of reactants Low temperature, low pressure and high concentration of reactants.
7 Hypo is used in photography to. Reduce AgBr to metallic silver Remove silver a silver salt Remove undecomposed silver bromide as soluble complex Remove reduced silver
8 Which of the following represent the fuming sulphuric acid H2S2O4 H2S2O3 H2S2O6 H2S2O7
9 Which of the following compounds is must acdic. H2O H2S H2Se H2Te
10 Which one of the following has the highest boiling point. H2O H2S H2Se H2Te
11 The hybridization of S in SO2 is. sp sp2 sp3 dsp2
12 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
13 When a lead a storage battery is discharged . SO2 is evolved PbS is consumed Pb is formed H2SO4 is consumed
14 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.
15 Oxalic acid when heated withe conc. H2SO4 it gives out. H2O and CO2 CO and CO2 CO2 and H2S Oxalic sulphate
16 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
17 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
18 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
19 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
20 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
Download This Set

Is this page helpful?

×