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CHEMISTRY, , we, , , , , For: JER(Main & Ady ance), Medical,, Topic: STATES OF MATTER, , Multiple choice questions with only, one correct answer., , The critical volumes of four gases \,, B.C. D are respectively 0.025 10.312, L,0.245 L, 0.4321, the gas with high, , est value of vander waal constant b is, , (aA (b)B, , (c)C (dD, , Which of the following sets consists, of gases with same rate of diffusion ?, (a) H,, D.. He, , (b)CO,, NC ),,CH,, , (c)CO,,N,0, CH,, , (d)N., CO,, C,H,, , Equal masses of ethane and hydrogen, are mixed in an empty container at, 25°C. The fraction of total pressure, exerted by hydrogen is :, , (a)1:2 (b) Ls 1, , (c) 1:16 (d) 15:16, , The two gas cylindefs having same capacity have been filled With 442 of H, , and 44g of CO, respectively. If the, pressure in the cylinder of CO, is | atmosphef€ at a particular tempreature, the pressure iin the hydrogen cylinder, at the same tempreature is :, , (a) | atm (b) 2 atm, , (c) 44 atm (d) 22 atm, , The rate of diffusion of methane is, twice that of X, The molecular mass o!, X is:, , (a) 64 (b) 32, , (c) 40 (d) 80, , The average kinetic energy of an ideal, gas per molecule in $.1. unit at 25° ¢, , will be :, , , , Laxmi Cold Storage C, Mob :, , , , , , , ampous, Op, 9939607302, 9570038843, , XE& XH, By: B.D. SINGH, ' ', , (8) 61.7«10" 7 {, (C) 6.17x10% (d), \ gas will approach ided, (a) Low temperature, law p ', (b) Low temperattire high pr, (c) High tempreature, low pre, (d) High tempreature. high ;, 8. The volume of 2.82 of carbon m, ide at?7"Cand.0.0821 atm i, (a) 30D, (c) 0.3L, , (b) 31, (d) 1.51, , 9,” At What temperature RMS of SO., , same a§ that O, at 303 K ?, {a)403 K (b) 303 K, (c) 606 K (d) 273K, , 10. When the temperature is increased surface tension of water is, (a) Increases (b) Decreases, (c) Remains constant, (d) Shows irregular behaviour, , 11. Which of the following graphs represent Boyle’s law ?, , *| A |, , (a) P| (b) PV, V> p>, , a} |, (c) P| (d)PVvi \__, miry p>, , 12. The units of constant a in vander waal’s, equation is :, (a) dm} atm mol?, (b) dm atm mol", (c) dm? ate! mol, (d) atm mor", , 13. Atlow pressure, the vanderwaal’s equation is reduced to:, , , , , , ahapur Hatt, Patna - ©, , , , p- AY

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PNy _ 2?, RT RT, bp, RI, , (a) Z, , (b) fn }, (c) a, RT, , PN, d)Z m, () RT RI, , 14. Which set of conditions represents, , a, , easiest way to liquefy a gas ?, (a) Low temperature and high pressure, (b) High temperature and low pressure, (c) Low temperature and low pressure, (d) High temperature and high pressure, 15. Vander waal’s equation of state is, obeyed by real gases. Forn moles ofa, real gas, the expression will be, , , , (a) Pp. y y = |=Rr, , I n—-b, b)=nkRT, , (c) p+ \(av —b)=nRT, , ey, b)(r+5) i(v, (, , , , (d) (n+ 2F\w ~ nh) oma, , 4, , , , , , , , , , , 16. The unit of coefficient o i” 8, (a) Poise (b) Ns, (c) Both (d) Rone of these, 17. The d of gaS is 1.964 gdm° at, 27 Hg the gas is :, (a) » (b) C,H,, (c) CO, (d) Xe, 18. The kinetic energy of any gas molecule, at OC is, (a) 5.66x107') (b) 2408 J, ()2J (d)2 Cal, 19. According to kinetic theory of gases., for a diatomic molecule :, _ (a) The pressure exerted by the gas is, al to the mean velocity of the, , ze Campous, Opf, 1939607302, , |, , , , , , , , (b) The pressure exerted by the gas is, proportional to the root Mean square, velocity of the molecule, (c) The root mean square ve locity of, the molecule is inversely proportior, to the temperature, (d)The mean trans lational kinet, ergy of the molecule is proportior, the absolute temperature, 20, Which gas shows ree il behaviour, (a)8gO,at ST P occupies)5.6 |, (b) 1 @ H, in 0.540 flask exerts a pr, sure of 24. 63 atm at 300K, (c) | mol NEL, at 300K and | atn, cupies volume 22. 4}, (d)5.6LofCO, at STP is equal to | lg, 21. 1,1 gre three isotherms respectivel, at Ty T, and 1 Temperature will be |, , order :, , (ame! =T; t, , tb) <T,<T, PF |\ {, fc), > T,>T, | —, wr >5,=T1, >, , =., , Which of the following are correct, RMS velocity of O, gas at 127, , (a) 4.835710? ms" (b) 2.43, (c) $.245=10'ms, , 10° ms, , (d) 4.8357x10'ms ,, , _ If | litre of a gas A at 600 mm and 0.5, litre of gas B at 800 mm are taken ina, 2-litre bulb, the resulting pressure is :, (a) 1500 mm (b) 1000 mm, (c) 2000 mm (d) 500 mm, , _ The values of vander Waals constant” a’, , for the gases O,, N,, NH, and CH, are, , 1.36, 1.39, 4.17 and 2. 253 L? 2 atm mole?, , respectively. The gas which can most, , easily be liquefied is :, , (a)O, (b)N,, , (c) NH, (4) CH,, , The ratio between the rms velocity of, , H, at 50 K and that of O, at 800 Kis:, , (a) 4 (b)2, , (c) 1 (d) 1/4, , ). Musallahapur Hatt, ees, , R 9570038843