Shilpa

O2  gas (molar mass 32) at a temperature T. The pressure of the gas is P. An identical vessel containing one mole of He gas (molar mass 4) at temperature 2T has a pressure of (a) P/8        …

(a) It obeys Boyle’s law (b) It follows PV = RT (c) Internal energy depends on temperature only (d) It follows Vander-Waal’s equation Answer-d (12)

(a) Varies inversely as its mass (b)   Varies inversely as the square of its mass (c)   Varies linearly as its mass (d)   Is independent of its mass Answer-c   (8)

m1,m2 and m3 and the number of molecules in their respective containers are N1,N2  and N3 . The gas pressure in the containers are P1,P2  and P3 respectively. All the gases are now mixed and put in one of the …

(a)   P / 2                                        (b)   P (c)   2P                                            (d)   4P Answer-c (7)

(a)   2                                               (b)   4 (c)   1/4                                          (d)   1/2 Answer-d (6)

(a)  1092 K                                            (b)   273 K (c)   546°C                                             (d)   273°C Answer-d (2)

O2 is (a)   PV = 8RT                                         (b)   PV = RT/4 (c)   PV = RT                                           (d)   PV = RT/2 Answer-b (6)

(a) Number of molecules      (b)     Atomic number (c) Mass number                    (d) Number of moles Answer-d (4)

1500 m3 of helium at 27°C  and 4 atmospheric pressure. The value of helium at -3°C  temperature and 2 atmospheric pressure will be (a) 1500 m3                   (b) 1700 m3 (c) 1900 m3                   (d) 2700 m3 Answer-d (7)

(a) 2 times                         (b) 4 times (c) (1/4) times                   (d) (1/2) times Answer-c (12)

27°C temperature and 30 atmospheric pressure is allowed to expand to the atmospheric pressure. If the volume becomes 10 times its initial volume, then the final temperature becomes (a) 100°C                        (b) 173°C (c) 273°C                        (d) – 173°C Answer-d (7)

0°Cand 2 atm pressure will be (a) 0.56 litre                   (b) 1.2 litres (c) 2.4 litres                   (d) 5.6 litres Answer-a (3)

27°C and its temperature is raised to 52°C. The mass of the gas that has to be released to maintain the temperature of the gas in the flask at 52°C and the pressure remaining the same is (a) 2.5 g                         …

27° is heated till its pressure and volume are doubled. The final temperature attained by the gas is (a) 927°C                        (b) 900°C (c) 627°C                        (d) 327°C Answer-a (4)

(a) Einstein                    (b) Newton (c) Maxwell                    (d) Raman Answer-c (5)

If Cb and Ca are the velocities of sound in this gas before and after expansion respectively, then Ca is equal to (a)  2Cb                                 …

(a) 50 ml                              (b) 100 ml (c) 200 ml                           (d) 500 ml Answer-b (8)

(a)   PV=(5/32)RT                 (b)   PV=5RT (c)   PV=(5/2)RT                        (d)  PV=(5/16)RT (Where R is the gas constant) Answer-a (2)

(a) 0.4%                        (b) 0.2% (c) 0.1%                         (d) 0.8% Answer-a (3)

500m3 of helium at 27°C and 1 atmosphere pressure. The volume of the helium at – 3°C temperature and 0.5 atmosphere pressure will be (a)  500m3                              (b) 700m3 (c)  900m3                   …

(a) A constant (b) Approx. equal to the universal gas constant (c) Directly proportional to its temperature (d) Inversely proportional to its temperature Answer-c (11)

(a) mkT                                (b) P/kT (c) P/kTV                           (d) Pm/kT Answer-d (4)

(a) 100 cc                             (b) 400 cc (c) 2.5 cc                              (d) 104 cc Answer-c (11)

(a)  The nature of the gas used in the experiment (b) The magnitude of g in the laboratory (c) The atmospheric pressure (d) The quantity of the gas enclosed Answer-d (3)

(a)    1 : 1                                (b) 1 : 2 (c) 2 : 1                                   (d) 4 : 1 Answer-d (2)

1.64×10-3 atmospheres and temperature 200 K having the volume 1 cc are (a) 6.02×1016                          (b) 2.63×1016 (c) 3.01×1019                         (d) 12.04×1019 Answer-a (8)

(a) 2 cal/K                            (b) 10 cal/K (c) 0.2 cal/K                        (d) 200 cal/K Answer-a (6)

(a)  4 gm                               (b) 4.21 gm (c) 1.13 gm                           (d) 10 gm Answer-c (74)

(a) 0.29 J/K-gm                    (b) 4.2 J/K–gm (c) 8.3 J/K-gm                       (d) 16.5 J/K-gm Answer-a (77)

(a) Which obeys Vander Waal’s equation (b) Which obeys gas equation at every temperature and pressure (c) The molecules of which are having potential energy (d) Which is a inert gas Answer-b (5)

(a) Isothermal change          (b) Adiabatic change (c) Isobaric change              (d) Any type of change Answer-d (6)

(a) 400 K                             (b) 127 K (c) 200 K                              (d) 25 K Answer-a (3)

(a)    700 ml                            (b) 600 ml (c) 500 ml                               (d) 400 ml Answer-a (4)

(a) 5%                            (b) 5.26% (c) 4.26%                       (d) 4.76% Answer-d (2)

(a) 0.07                          (b) 0.25 (c) 0.5                            (d) 0.75 Answer-a   (7)

(a) 250 K                              (b) 250°C (c) 2500 K                          (d) 25°C Answer-a (5)

T0 at sea level and another 1 cc sample of air at a height where the pressure is one-third atmosphere. The absolute temperature T of the sample at that height is (a) Equal to T0/3 (b) Equal to 3/T0 (c) …

(a) The molecules of a gas are in continuous random motion (b) The molecules continuously undergo inelastic collisions (c) The molecules do not interact with each other except during collisions (d) The collisions amongst the molecules are of short duration …