Page 2 : D PAPES, g-BLOCK ELEMENTS (I), 513, 3 In how many of the following number of lone pairs at, 13 The geometry of XeOF, is, (a) pyramidal, (c) octahedral, IRPMT, central atom is zero, XeO,, XeO,F, Xeo,.XeO,F,, XeF,?, (a) 2, (b) T-shaped, ad o so, ack o, (d) tetrahedral, (b) 3, (d) Zero, 4 Which of the following rare gas is the abundazt in air?, (b) Ne, (d) Kr, (AIIMS), 14 The noble gas compound prepared by Bartlett was, (a) XeO,, (c) KrF, (e) 4, eed clot, (b) XePF,, (d) XeF,, RPMT, (a) He, (c) Ar, LAPMER), 15 The noble gas which can diffuse through nubber and glass, casily is, (a) Xe, RPMT, 2018, SA gas X is used in filling balloons for meteorological, observations, It is also used in gas-cooled nuclear reactors., Here, the gas Xis, (a) neon, (c) krypton, 6 Xenon hexafluoride reacts with silica to form a xenon, compound X. The oxidation state of xenon in X is UIPMER), (a) + 2, 2017, 7 Consider the following reactions, (b) Ne, (c) Ar, (d) He, 16 Which is moncatomic?, (a) Sulphur, (c) Phosphorus, 17 Molecules of a noble gas do not possess vibrational energy, because noble gases, [MP PMT), (b) Helium, (d) Chlorine, dre p, (b) argon, (d) helium, AIMS), (KCET), (a) are monoatomic, (b) is chemically inert, (e) has completely filled shells, (d) is diamagnetic, 18 Which one has the highest boiling point?, (a) H,, 19 Argon was discovered by, (a) Rayleigh, (c) Both (a) and (b), 2009, (b) + 4, (c) + 6, (d) 0, on , s, dissivns, UCECE), KI,, 0,is, (b) Xe, (c) CH,, (d) He, Excess, (CMC), Xe+ F, (b) Ramsay, (d) Frankland and Lockeyer, hest raida, 15 mixture, scoc, 60 am, 1:20 mixture, Here, X, Y and Z respectively, are, (a) XeF, XeF,, XcF,, (c) XeF,. XeF, XeF,, (AIIMS), 20 The coloured discharged tubes for a sdvertisement mainly, contain, (b) XeF, XeF,, XeF,, (d) XeF, XeF,, Xef,, IManipai, (d) argon, nebod fun, olysis af n, e of Ca N, (a) xenon, (b) helium, (c) neon, 2014, 21 The forces acting between noble gas anoms are Manipal), (a) van der Waals' forces, 8 Among the following inert gas elements, the element that, (b) ion-dipole forces, shows highest chemical reactivity is, (a) Ne, (c) London-dispersion forces (d) magnetic forces, 22 The mumber of pn-dn 'pi' bonds present in Xe0, and, XeO, molecules, respectively, (a) 3, 4, (EAMCET), (b) Ar, (c) He, (d) Xe, LEAMCET), 2011, (b) 4, 2, (c) 2, 3, (4) 3, 2, 9 In Ramsay and Rayleigh's isolation of noble gases from air,, the nitrogen of the air is finally converied into, (a) NANO, only, (c) NANO, only, 10 Number of nan-bonding electron pair on Xe in XeF, .XeF, and XeF, respectively will be, (a) 6, 4, 2, 2010, 11 Argon possesses, (a) translational motion only, (b) translational + rotational motion, (e) translational + vibrational motion, (d) translational + rotational + vibrational motion, 12 The noble gas was first time discovered by, (a) Cavendish, (c) Rayleigh, 23 Argon is used, (a) to obtain low temperature, (b) in high temperature welding, (c) in radiotherapy for the treatment of cancer, (d) in filling airships, 2008, OKCET, (KCET), (b) NO and NO,, (d) NaNO, and NANO,, (Guj CET), (b) 1, 2, 3, (c) 3, 2, 1 (d) 0, 3, 2, 24 What is the correct order of occurrence (% by weight) in air, of Ne, Ar and Kr?, (AFMC, (b) Ar> Ne > Kr, (d) Ne > Kr> Ar, (a) Ne > Ar> Kr, (c) Ar > Kr> Ne, 25 In the separation of noble gas mexture from air by Ramsay, Rayleigh's first method, the substances used for th, removal of N, and O, respectively, are, (MHT CET), C D, (Punjab PMET, (b) Mg and Cu, (d) KOH solution, Ae in c, (a) Cu and Mg, (c) C and CaC,, (Manipal), (b) William Ramsay, (d) Frankland

Page 3 : 514, CHAPTERWISE & TOPICWISE MEDICAL SOLVED PAPEPS, 26 Which of the following statements about noble gases are, correct?, 35 The formation of O [PF, is the hasis for the forma, I. XeO, is an explosive tetrahedral molecule., II. In Fisher Ringe's method, a mixture of CaCI, and, CaC, is used to remove N, and O,, II. He and Ne are chemically inert due to lack of, d-orbitals and high icnisation potential., IV. At 173 K, He and Ne are adsorbed on activated, charcoal., The correct answer is, of xenon thuorides. This is because, 1. O, and Xe have comparable sizes, II, Both O, and Xe are gases., 1I1. O, and Xe have comparable ionisation energies, IV. O, and Xe have comparable electronegativities, (a) I and II, 36 XeF, reacts with water at-80'C to give, (a) XeOF, (c) XeO,, (b)I and II (c) Il and III (d) tl and IV, G CTm, (EAMCET), (b) XeOF,, (a) I and II, (c) II, II and IV, 27 Helium is used in balloons in place of hydrogen because it, (b) Il and III, (d) I, II, Il and IV, (d) XeO,Fe, 2005, 37 Which of the following is planar?, (a) XeF, (c) XeO,F,, 38 Match the following Columns., is, (KCET), UK Cm, (a) incombustible, (b) lighter than hydrogen, (d) more abundant than hydrogen, (b) XeO,F, (d) XeF,, (c) radioactive, 2007, Kerala CER), 28 Which of the following gas mixture is used by the divers, inside the sea?, Columa II (Application, Columa I (Substance), LAFMC, (a) O, + He (b) 0, Xe (c) 0, + Ar (d) O, + N, 29 Which of the following radioactive elements is inert gas?, Chlorinating agen, 2 Inert atmosphere (metalrg), 3 Cryogenics, 4. Advertising signs, A Helium, 1., B. Argon, C. Neon, (a) Ra, (b) Rn, (c) Pu, (d) Po BHUI, D. PO,, E PCI,, 30 Noble gases are adsorbed by, (a) anhydrous calcium chloride., (b) feric hydroxide., (c) conc. H, SO,, (d) activated coconut charcoal., 31 The noble gas mixture is cooled in a coconut bulb at 173 K., The gases that are not adsorbed are, (a) Ne and Xe, (c) Ar and Kr, (AMU), 5. Dehydrating agent, B, (a) 3, (b) 3, 2., A., D., 4., 5n, 2., (e) 3, 4., 4., (KCET), (d) 5, (e) 5, 2., 3., 3., (b) He and Xe, 4., (d) He and Ne, 39 D, line observed in the yellow region of the Sun's, 2006, spectrum is due to, (a) sodium, (c) krypton, 40 Which of the following is not correct?, (a) Xe0, has four o and four e-bonds,, (b) The hybridisation of Xe in XeF, is p'd, (c) Among noble gases, the occurrence (per cent by, weight) of argon is highest in air, (d) Liquid helium is used as cryogenic liquid, 41 Which of the following is the most polarised?, Haryana PM, 32 Which of the following is not obtained by direct reaction of, (BHU), (d) Xef,, (b) neon, constituent elements?, (d) helium, (a) XeF,, (b) XeF,, (c) Xeo,, (EAMCIT, 33 Which incrt gas show abnomal behaviour on, liquefication?, (a) Xe, (UP CPMT), (b) He, (c) Ar, (d) Kr, 34 In clatherates of xenon with water, the nature of bonding, between xenon and water molecule is, (MHT CET), (a) đipole-induced dipole interaction, (b) coordinate, (c) bydrogen bonding, IDUMET), (a) Kr, (b) He, (e) Ar, (d) Xe, (d) covalent, బర్ సిప్టమ్స్లో క్రమమైన వద్ధతిలో నమోదు, d contained in the computer printout, outer systems in the ordinary course, ఎంలో కంప్యూటర్ పిద్టప్స్ పరిగ్గా వచిచేయుచున్నవి, కార్డుల యధ్యార్థతను ప్రభావితం చేసే ఏనిధమైన, the computer was operating properly., oblems that affect the accuracy of the, computer systems., బ నా విశ్వాసం మేరకు ఏరియైనవి., est of my knowtedge and belief.