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 Which of the following has highest ionization energy. Oxygen Argon Barium Caealum
2 The noble gas which was discovered first in the sun and then on the earth is. Helium Neon Argon Xenon
3 Helium is used in weather balloons and airships instead of H2 becuse it is. Lighter than hydrogen Incombustible More abundant than hydrogen Radiactive
4 The oxidation number Xe in XeOF2 is 0 +2 +4 +3
5 Helium oxygen mixture is used by deep sea divers in preference to nitrogen oxygen mixture, because. Helium is much less soluble in blood than nitrogen Nitrogen is much less soluble in blood than helium Due to high pressure deep under the sea, nitrogen and oxygen react to give poisonous nitric oxide. Nitrogen is highly soluble in wateer
6 The noble gas used or treatment of cancer is Helium Argon Radon Krypton
7 The oxidation state of Pt in Xe+ [Pt F6] is +4 +5 +6 None of these
8 The first noble gas compound was XeO3 XeF4 XeF6 Xe +[PtF6]
9 Noble gases are used in discharge tubes to give different colours. Raddish orange glow is due to. Ar Ne Xe Kr
10 Pick out the incorrect statement for Xe F6 XeF6 is hydrolyzed practically to form XeOF4 It reacts with SiO2 to form Xe F4 On complete hydrolysis, it forms XeO3 It acts as F acceptor when treated with alkali metal fluoride, but cannot act as F donor to form complexes.
11 Pick out the incorrect statement for XeF4 XeF4 disproportionate violently with water It is used as fluorinating agent It has octahedral structure for geometry It oxidizes I to I<sub>2</sub>
12 Which is incorrect statement for Xe F2. It has linear structure. It is hydrolyzed rapidly in aqueous solution of a base It oxidizes Cl and I to Cl2 and I 2 respectively It cannot act as F donor
13 The 'shape' of molecule ." Xe F6 is. Pentagonal bipyramidal Regular octahedral Distorted octahedral Square planar
14 Compounds formed when noble gasses get entrapped in the cavities of crystal lattices of certain organic and inorganic compounds are called. Interstitial compounds Hydrates Clathrates Picrates
15 Which of the following statements is not correct about noble gases. Their ionization energies are very high Their electron affinities are nearly zero They do not form any chemical compounds They are not easily liquefied
16 The increase in boiling points of noble gases from He to Xe is due to the Decreases in ionization energy Increases in polarizability Increase in electron affinity Increase in atomic volume
17 Noble gases are sparingly soluble in water owing to. Dipole -dipole interactions Dipole -induced dipole interactions Hydrogen bonding Induced dipole -instantaneous dipole interactions
18 Which one of the following noble gas is obtained by radioactive disintegrastion Kr Br Rn Xe
19 For the respiration of sea divers mixture is used. He &amp; O2 Ar &amp; O2 Ne &amp; O2 Kr &amp; O2
20 Helium is used for The preservation of food Filling electrical transformer Pressuring agent in rockets All of above
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