AIIMS,CBSE,AIPMT, AFMC,Bio.Tech & PMT, Contact : , Mail at :- by AKB

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1 Ioni solids are haraterized y (a) low melting points () good ondutivity in solid state () high vapour pressure (d) soluility in polar solvents 2 Amorphous solids.

1 1 Ioni solids are haraterized y (a) low melting points () good ondutivity in solid state () high vapour pressure (d) soluility in polar solvents 2 Amorphous solids. (a) have sharp melting points () undergo lean leavage when ut with knife () have perfet arrangements of atoms (d) an presses small regions of orderly arrangements of atoms 3 The fore of attration etween the atoms of helium is (a) hydrogen onding () oordinate ovalent ond () ovalent ond (d) london dispersion fore 4 Whih of the following is a pseudo-solid (a) af2 () Glass () Nal (d)all 5 Diamond is a ad ondutor eause (a) It has a tight struture () It has a high density () There is no free eletron present in the rystal of diamond to ondut eletriity (d) None of the aove 6 The weakest intermoleular for a (a) dipole dipole fore () eletrostati fore etween ions () ion dipole fore (d) dipole indued dipole fore 7 In liquids intermoleular fores are (a) very weak () very strong () reasonaly strong (d) ion dipole fore 8 Values of heat of vaporization for liquids, with strong dipole dipole fores will e (a) very high () very low () reasonaly high (d) negligile 9 Instantaneous dipole indued dipole fore is also alled (a) dipole fore () london dispersion () hydrogen onding (d) none of the aove 10 Down the group polarizaility generally (a) inreases () dereases () remains onstant (d) do not follow a regular trend 11 Trend of oiling points of halogens from fluorine to iodine is that it. (a) dereases () inreases () remains onstant (d) negligile 12 Moleules of hydro arons with large hain lengths experiene (a) repulsive fores () strong attrative fore () weaker attrative fores (d) no attrative fore 13 Hydroarons whih generally have high moleular masses exist is. (a) solid form () liquid form () vapour form (d) gaseous form AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

2 14 Exeptionally low aidi strength of HF is due to (a) strong polar ond () small size of fluorine () strong hydrogen onding (d) Vander Waal s fores 15 Long hain of amino aids are oiled aout one another into spiral y. (a) ovalent ond () ioni ond () hydrogen ond (d) Vander Waal s fores 16 Evaporation of water is possile at (a) 100o () 0o () at all temperatures (d)aove 100o 17 Boiling point is low for liquid with (a) high vapour pressure at given temperature ()low vapour pressure at a given temperature () very high vapour pressure (d) very low vapour pressure 18 At equilirium rate of evaporation and rate of ondensation (a) eome very high () eome very low () an never e equal (d)eome equal 19 In an open system vapour pressure of water at 100o at sea level is (a) 700 mm of Hg () 760 mm of Hg () 670 mm of Hg (d) 1000 mm of Hg 20 Molar heat of vaporization of water is (a) kj/mol () kj/mol ()18 kj/mol (d)40.6 kj/mol 21 When external pressure is 23.7 torr oiling point of water is (a) 100o () 200o () 98o (d) 25o 22 Distillation under very redued pressure is alled (a) frational distillation () distillation () vauum destrutive distillation (d) destrutive distillation 23 Water may oil at 120o when external pressure is (a) 760 torr () 100 torr ()1489 torr (d) 700 torr 24 Amount of heat asored when one mole of solid melts into liquid form at its melting point is alled (a) molar heat of sulimation () heat of vaporization () latent heat of fusion (d) molar heat of fusion 25 Ethanol is muh more solule in water than ethyl ethanuate whih one of the following statement orretly aount for this (a) ethanol is polar moleule ut ethyl ethanoate is non polar () ethanol is non polar moleule ut ethyl ethanoate is polar () a hydrogen ond is formed etween H atom of the OH group in ethanol and O atom of water moleule d) a hydrogen ond is formed etween the H atom of the OH group in ethanol and hydogen of the water moleule AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

3 26 The oiling point of a liquid will e (a) lower at high altitude () higher at high altitude () same at sea level and high altitudes (d) equal to atmospheri pressure 27 The proess in whih liquids an e made to oil at low temperature is alled (a) vauum distillation () destrutive distillation () distillation (d) vauum destrutive distillation 28 Why is the oiling point of methane greater than that of neon (a) a moleule of methane has a greater mass () a moleule of methane has more eletrons than a moleule of neon () the moleules of methane have stronger intermoleular fores than those of neon (d) the moleule of methane is polar ut that of neon is not 29 The amount of heat required to vaporize one mole of a liquid at its oiling point is alled (a) molar heat of vaporization () molar heat of fusion () latent heat of fusion (d) molar heat of sulimation 30 Whih of the elements in its rystalline form will have lowest enthalpy hange of vaporization (a) hlorine () argon () phosphorous (d) silion 31 rystals show variation in physial properties depending upon the diretion. The property alled (a) isomorphism () polymorphism () anisotropy (d) isotropy 32 ertain melt to a turid liquid phase with properties of liquids as well as some degree of order like solid. Suh turid liquids are alled (a) anorphous solid () vitreous solid () rystalline solid (d) liquid rystal 33 Isomorphous rystals show (a) same hemial properties () same physial properties () same rystalline form (d) same melting point 34 Existene of an element in more than form is known as (a) allotropy () isomorphism () isotropy (d) none of these 35 rystalline forms of the same, sustane an oexist in equilirium with eah other at its (a) melting point () transition temperature ()oiling point (d) none of these 36 rystal lattie of sustane an e atagorised into (a) five types () seven types () six types (d) none of these 37 ovalent solids are omposed of (a) ions () different moleules () neutral atoms (d) any of the aove 38 aron atoms of diamond are (a) sp hyridized () sp2 hyridized () sp3 hyridized (d) unhyridized 39 Moleular rystals are generally (a) hard () soft () unstale (d)stale 40 Ioni rystals are (a) hard () soft () rittle (d) amorphous AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

4 41. Whih statement orretly desries Hess's Law? a The enthalpy of all reatants in their standard states is defined as zero. d e Enthalpy hanges may only e alulated if one or more of the reatants is an element. The enthalpy hange of a reation is independent of the route taken. The enthalpy hange of a reation may only e alulated at 1 atm pressure and 25. Exothermi reations our quikly, endothermi reations our slowly. 42. Whih one of the following statements est desries the standard enthalpy of formation of any element? a The value of H f(element) depends on temperature. The value of H f(element) is zero only for elements in the solid state. The value of H f(element) is zero for any element in the standard state. d The value of H f(element) is zero only at asolute zero temperature. e The value of H f(element) depends on S for that element. 43. Under whih irumstanes would a reation e non-spontaneous at all temperatures? a d e ΔH negative and ΔS positive ΔH negative and ΔS negative ΔH positive and ΔS negative ΔH positive and ΔS positive It is impossile to tell without alulating ΔG. 44. In whih diretion will the following equilirium shift if a solution of H 3 O 2 Na is added? H 3 OOH(aq) H 3 O 2 (aq) + H + (aq) A B D shift to the right (more produts) shift to the left (more reatant) no hange annot e predited 45. In whih of the following aid / ase titrations, an we NOT determine the equivalene point in an aurate manner? a d strong aid / strong ase strong aid / weak ase weak aid / strong ase weak aid / weak ase AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

5 46. What is the expression for K a for the following reation? H 3 OOH(aq) H 3 O 2 (aq) + H + (aq) A K a = [H 3 O 2 (aq)][h + (aq)]/[h 3 OOH(aq)] B K a = 2[H + (aq)]/[h 3 OOH(aq)] K a = [H + (aq)] 2 /[H 3 OOH(aq)] D K a = [H 3 OOH(aq)]/[H + (aq)] Rank the following 1 M water solutions in order of dereasing freezing point. Nal gluose al 2 H 3 OOH Na 3 PO 4 highest freezing point lowest freezing point a Nal > gluose > al 2 > H 3 OOH > Na 3 PO 4 gluose > Nal > al 2 > H 3 OOH > Na 3 PO 4 gluose > Nal > H 3 OOH > al 2 > Na 3 PO 4 d gluose > Nal > H 3 OOH > Na 3 PO 4 > al 2 e gluose > H 3 OOH > Nal > al 2 > Na 3 PO Arrange the following speies from left to right in order of inreasing radius. Na, Mg, F, Na +, Mg 2+ a F < Mg 2+ < Na + < Mg < Na Na + < Mg 2+ < F < Mg < Na Na + < Mg 2+ < F < Na < Mg d Mg 2+ < Na + < F < Mg < Na e Mg 2+ < Mg < Na + < Na < F 49. What is the [OH ] of a solution with a ph of 9.0? a M M M d M e none of the aove 50. Whih of the following statements regarding the soluility of Mg(OH) 2 is orret? a ph has no effet on the soluility of Mg(OH) 2. Mg(OH) 2 is less solule at ph 4 than ph 7. Mg(OH) 2 is less solule in 0.1 M Mgl 2 solution than in water. d all of the aove e none of the aove AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

6 51. When ells are plaed into an isotoni solution (i.e. the solution and ell fluid have the same osmoti pressure): a no exhange of water aross the ell memrane ours. water enters the ell faster than it leaves the ell. d e A(g) + B(g) 2(g) pk a = 5.97 H N NH pk a = 1.82 HOO H 2 H NH 3 pk a = 9.17 Whih one of the following is the predominant struture at ph 7.6? N NH H N NH N NH HOO water leaves the ell faster than it enters the ell. water enters the ell at the same rate that it leaves the ell. ready exhange of solutes, ut not water, ours aross the ell memrane. 52. What is the relationship etween K and K p for the following reation? a K p = K (RT) 2 K = K p (RT) 2 K = K p d K = K p e K = K p RT 53. Histidine is an amino aid. The fully protonated form has the pk a values indiated elow. H 2 H NH 3 A H N O 2 NH H 2 H NH 3 B N NH O 2 H 2 H NH 3 HOO H 2 H NH 3 HOO H 2 D E H NH 2 AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

7 54. Arrange the following 1 M solutions in order of inreasing ph. a Hl KOH al 2 H 3 OOH Na 3 PO 4 KOH < al 2 < Na 3 PO 4 < H 3 OOH < Hl Hl < al 2 < H 3 OOH < KOH < Na 3 PO 4 H 3 OOH < Hl < al 2 < KOH < Na 3 PO 4 d Hl < H 3 OOH < Na 3 PO 4 < al 2 < KOH e Hl < H 3 OOH < al 2 < Na 3 PO 4 < KOH In answering questions 15-19, onsider the following titration urve ph Amount of solution added (ml) 55. Whih one of the following ominations does the titration urve represent? a Addition of a strong ase to a weak aid Addition of a weak ase to a strong aid Addition of a strong aid to a weak ase d Addition of a weak aid to a strong ase e Addition of a strong aid to a strong ase 56. What is the value of the pk a that an e otained from this titration urve? a d 5.3 e What is the ph of the solution at the point of maximum uffering? a d 5.3 e What is the ph of the solution at the equivalene point? a d 5.3 e 1.8 AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

8 59. Whih one of the following indiators would e most suitale for this titration? a any aid/ase indiator is suitale phenolphthalein (pk a = 9.6) resol red (pk a = 8.3) d methyl red (pk a = 5.1) e methyl yellow (pk a = 3.1) 60. How many stereoisomers are possile for the omplex [Nil 2 (en) 2 ]? en = ethylenediamine = NH 2 H 2 H 2 NH 2 a d 4 e How many stereoisomers are possile for the omplex [Ni(en) 3 ] 2+? en = ethylenediamine = NH 2 H 2 H 2 NH 2 a d 4 e What is the soluility onstant expression for Zn 3 (PO 4 ) 2? A K sp = [Zn 2+ ][PO 4 3 ] B K sp = [Zn 2+ ][2PO 4 3 ] K sp = [Zn 2+ ] 3 [PO 4 3 ] 2 D K sp = [3Zn 2+ ] 3 [2PO 4 3 ] 2 E K sp = [Zn 3+ ] 2 [PO 4 2 ] What is the soluility produt onstant expression for Ag 3 PO 4? A K sp = [Ag + ][PO 4 3 ] B K sp = [Ag + ][PO 4 3 ] 3 K sp = [Ag + ] 3 [PO 4 3 ] D K sp = [3Ag + ] 3 [PO 4 3 ] E K sp = 3[Ag + ][PO 4 3 ] AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

9 64. How would the onentration of P 2+ (aq) ions in equilirium with PI 2 (s) e affeted if the onentration of I (aq) ions were douled? a no hange inreased y a fator of 2 dereased y a fator of 2 d dereased y a fator of 4 e dereased y a fator of Whih one of the following is a oordination isomer of the omplex salt, trans-[rl 2 (OH 2 ) 4 ]Br? A B D E is-[rl 2 (OH 2 ) 4 ]Br trans-[rbrl(oh 2 ) 4 ]l trans-[r Br 2 (OH 2 ) 4 ]l trans-[rbr 2 (OH 2 ) 4 ]l trans-[r(oh 2 ) 4 l 2 ]Br 66. Whih one of the following equations desries the enthalpy of omustion of gluose. a d 6 H 12 O 6 (s) 6(s) + 6H 2 O(l) 6 H 12 O 6 (s) 2 2 H 5 OH(l) + 2O 2 (g) 6 H 12 O 6 (s) 6(s) + 3O 2 (g) + 6H 2 (g) 6 H 12 O 6 (s) + 3O 2 (g) 6O 2 (g) + 6H 2 (g) e 6 H 12 O 6 (s) + 6O 2 (g) 6O 2 (g) + 6H 2 O(g) Questions refer to the voltai ell shown elow. Voltmeter Ni Salt Bridge u 1.0 M Ni M u 2+ AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

10 67. What is the overall reation ourring in this ell? a There will e no spontaneous reation. Ni 2+ (aq) + u(s) Ni(s) + u 2+ (aq) u 2+ (aq) + Ni(s) u(s) + Ni 2+ (aq) d u 2+ (aq) + Ni 2+ (aq) + 4e u(s) + Ni(s) e u(s) + Ni(s) u 2+ (aq) + Ni 2+ (aq) + 4e 68. What would e the value of E ell at equilirium? a 0.58 V 0.34 V 0.24 V d 0.10 V e 0.00 V 69. What is the reading on the voltmeter when the half ells are first onneted? a d e 0.58 V 0.34 V 0.24 V 0.10 V 0.00 V 70. Whih eletrode is the anode and to whih eletrode do the eletrons flow? a The Ni eletrode is the anode; eletrons flow to the athode. The u eletrode is the anode; eletrons flow to the athode. The Ni eletrode is the anode; eletrons flow to the anode. d The u eletrode is the anode; eletrons flow to the anode 71. Rank the following series of atoms in order of INREASING eletronegativity. N O F P As a N < O < F < P < As F < O < N < P < As As < P < N < O < F d As < P < N < F < O e F < N < O < As < P AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

11 72. A reation has an ativation energy of 40 kj mol 1 and an overall energy hange of 100 kj mol 1. In eah of the potential energy diagrams shown elow, the horizontal axis is the reation oordinate and the vertial axis is potential energy in kj mol 1. Whih potential energy diagram est desries this reation? 4 0 a r e a t a n t s p r o d u t s r e a t ants produts reatants p r o d u t s d e r e a t a n t s p r o d u t s r e a t ants produts 73. What is the missing partile for the following nulear deay proess? 137 s 137 Ba +? a d e 1 n 0 0 1α 0 1α 0 1β 0 1β 74. What isotope is produed y the α-deay of 222 Rn? 86 A B D E 222 At Po Rn Fr At Whih one of the following statements aout reation rate is false? a Reation rate is the speed at whih the reation proeeds. Reation rate is governed y the energy arrier etween reatants and produts. Enzymes an aelerate the rate of a reation. d Reation rates are not sensitive to temperature. AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

12 76. What isotope is produed y the α-deay of 99 T? 43 A None - 99 T undergoes 43 β deay B D E 99 Mo N Ru Rh What is the oxidation state of Rh in the omplex K 3 [Rh(N) 6 ]? A +I B D 0 E 78. What is the oxidation state of T in K 2 [TO(ox) 2 ]? ox is the oxalate anion, 2 O 4 2. A B +II +III +IV D +V E +III +VI III +VI 79. A solid pharmaeutial dispersed in a arrier gas is an example of whih one of the following? a a gel a foam an emulsion d an aerosol 80. How many isomers are possile for the square planar omplex [PtI 2 (NH 3 ) 2 ]? a d 4 e 5 AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

13 81. Whih of the following statements is false? a. ondensed states have muh higher densities than gases.. Moleules are very far apart in gases and loser together in liquids and solids.. Gases ompletely fill any ontainer they oupy and are easily ompressed. d. Vapor refers to a gas formed y evaporation of a liquid or sulimation of a solid. e. Solid water (ie), unlike most sustanes, is denser than its liquid form (water). 82. Whih physial state/ property is inorretly mathed? a. liquids and solids - rigid shape. gases - easily ompressed. gases and liquids - flow d. solids - higher density than gases e. liquids - inompressile 83. An open-tue manometer is used to measure the pressure in flask. The atmospheri pressure is 756 torr and the Hg olumn is 10.5 m higher on the open end. What is the pressure in the flask? a mmhg. 861 m Hg. 861 torr d. 649 torr e mm Hg 84. The volume of a sample of a gas is 405 ml at 10.0 atm and 467 K. What volume will it oupy at 4.29 atm and the same temperature? a L. 189 ml. 174 ml d ml e. 944 ml 85. Asolute zero is the temperature at whih a. a graph of V versus 1/P intersets the 1/P-axis.. gaseous helium liquefies.. the straight line graph of V versus T intersets the T-axis. d. a graph of P versus 1/V intersets the 1/V-axis. e. none of the aove 86. A sample of nitrogen oupies 5.50 liters under a pressure of 900. torr at At what temperature will it oupy 10.0 liters at the same pressure? a d. 269 e. 370 AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

14 87. Snoopy is inflated for the May's Thanksgiving parade with 50,000 L of He at 25 and 1.2 atm. What is the perent derease in Snoopy's volume if the temperature drops to 4 efore the parade? Assume onstant pressure. a % %. 7.1 % d. 21 % e. 1.2 % 88. A gas sample oupies 1.00 L at 120. and 1.00 atm. What volume will it oupy at STP? a L L L d L e L 89. A sample of propane, 3 H 8, oupies 1.73 ml when the pressure is 320 torr at 30. What is the volume at STP? a. 656 ml. 499 ml L d L e. 808 ml 90. What volume will grams of O 2 oupy at STP, if it ehaves ideally? a L L L d L e L 91. Ten (10.0) moles of a gas are ontained in a 10.0 L ontainer at 273 K. alulate the pressure of the gas. a atm atm atm d atm e atm 92. A gaseous ompound is 30.4% nitrogen and 69.6% oxygen y mass. A 5.25-gram sample of the gas oupies a volume of 1.00 liter and exerts a pressure of 1.26 atmospheres at What is its moleular formula? a. NO. NO 2. N 3 O 6 d. N 2 O 4 e. N 2 O A 10.0-L flask ontains mole of H 2, mole of He and mole of Ne at What is the total pressure in the flask? a atm atm atm d atm e atm AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

15 94. A mixture of gas onsists of 5.0 g H 4, 5.0 g 2 H 2, and 5.0 g 2 H 4. What are the mole frations of eah? X H4 X 2H2 X 2H4 a d e A 5.00 L ontainer ontains H 4, H 2, and Xe at 35 with a total pressure of 1.81 atm. If there are equal moles of eah gas, what is the partial pressure of H 2? a atm atm atm d atm e atm 96. A 10.0-L flask ontains mole of H 2, mole of He and mole of Ne at What is the partial pressure of the Ne? a atm atm atm d atm e atm 97. What is the pressure exerted y a mixture of 1.0 g H 2 and 5.0 g He when onfined to a volume of 5.0 liters at 20.? a atm. 8.4 atm atm d atm e. 6.5 atm 98. What is the mole fration of O 2 in a mixture of 2.00 g He, 12.0 g O 2, and 17.0 g N 2? a d e A mixture of 16.0 g of He, 21.0 g of N 2, and 16.0 g of O 2 at 25 is in a 75.0-L ontainer. What are the mole frations of eah of these three gases? X He X N X O a d e Whih one of the statements elow aout the following reation is false? H 4 (g) + 2O 2 (g) O 2 (g) + 2H 2 O(g) a. Every methane moleule that reats produes two water moleules.. If 16.0 g of methane reat with 32.0 g of oxygen, the maximum amount of O 2 produed will e 22.0 g.. If 11.2 liters of methane reat with an exess of oxygen, the volume of O 2 produed at STP is (44/16)(11.2) liters. d. If 16.0 g of methane reat with 64.0 g of oxygen, the omined masses of the produts will e 80.0 g. e. If 22.4 liters of methane at STP reat with 64.0 g of oxygen, 22.4 L (STP) of O 2 an e produed. AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

16 d d d d a a a d d d d a a a d a a B D A E D A D E D D B D B E E A A A D B D A B D B 81. E 82. A E D E 89. A 90. A 91. E 92. D E 95. A 96. A 97. B 98. B 99. D 100. AIIMS,BSE,AIPMT, AFM,Bio.Teh & PMT, ontat : , Mail at :- iiokaare@gmail.om,,ompiled y AKB

CHEM1109 Example Multiple Choice Questions

CHEM1109 Example Multiple Choice Questions HM09 xample Multiple hoice Questions The following multiple choice questions are provided to illustrate the type of questions used in this section of the paper and to provide you with extra practice. It