Physics

(a) 273°C                                        (b)  546°C (c)   0°C                                          (d)  136.5°C Answer-a (4)

(a) Independent of its pressure but directly proportional to its Kelvin temperature (b)  Directly proportional to the square roots of both its pressure and its Kelvin temperature (c)   Independent of its pressure but directly proportional to the square root of …

(a) 2 v                                        (b) 3 v (c)   0.5 v                                   (d)  v Answer-d (3)

(a)  4v                                       (b)   2v (c)   v/2                                     (d)  v/4 Answer-b (3)

(a)  – 216°C                                     (b)  – 235°C (c)   – 254°C                                    (d)  – 264°C Answer-c (15)

(a) 492 m /s                                    (b)  517 m/s (c)   546 m/s                                   (d)  33 m/s Answer-b   (36)

(a) 77°C                                          (b)  350°C (c)   273°C                                      (d)  457°C Answer-a (4)

(a)  16 : 1                                         (b)  1 : 16 (c)   4 : 1                                        (d)  1 : 4 Answer-d (5)

(a) T                                 (b)  √T (c) T2                                (d) 1/√T Answer-b (3)

(a) Twice                                         (b)  Half (c)   Four times                              (d)  One-fourth Answer-a (6)

(a) Equal to that of helium            (b)  Twice that of helium (c)   Half that of helium                  (d)  √2 times that of helium Answer-d (18)

(a) √11 :3                                          (b) 3:√11 (c)   1 : 2                        …

(a)  2                                         (b)  1.58 (c)   1.6                                      (d)  1.31 Answer-c (20)

27°C and 1.0×105 N/m2 pressure. When the temperature is 127°C and pressure is 0.5×105 N/m2  , the r.m.s. velocity in  m/sec will be (a)  (100√2)/3                                  …

(a)  Absolute zero degree temperature is not zero energy temperature (b)  Two different gases at the same temperature pressure have equal root mean square velocities (c)   The root mean square speed of the molecules of different ideal gases, maintained at …

(a) 3/λ                                       (b)  λ/3 (c) √3/λ                                     (d) √λ/3 Answer-d (6)

(a) The r.m.s. velocity of all gases is more than the escape velocity from moon’s surface (b)  Its surface is not smooth (c)   It is quite far away from the earth (d)  It does not have population and plants Answer-a …

(a)  1219°C                                      (b)  1492°C (c)   400°C                                      (d)  400 K Answer-a (12)

(a) Will increase (b)  Will decrease (c)   Will remain unchanged (d)  Depends on the other factors Answer-c (7)

(a)  270°C                                        (b)  819°C (c)   1090°C                                     (d)  100°C Answer-b (2)

(a) m0                                     (b)  m (c) √m                                    …

1.2×10-7 mm of mercury at 27°C. Its volume is 100 cm3. The number of molecules that remain in the tube is (a)  2×1016                                        (b) 3×1015 (c)  3.86×1011                          …

(a) Hydrogen                                  (b)  Oxygen (c)   Equal for both                        (d)  Nothing is definite Answer-a (8)

O2 is 400 m/sec. At the same temperature, the r.m.s. velocity for H2 molecules will be (a)  100 m/sec                                 (b)  25 m/sec (c)   1600 m/sec                             (d)  6400 …

(a) √M1/M2                                              (b) √M2/M1 (c) √(M1+M2)/(M1-M2 )                        …

(a)  212 kPa                              (b)  209 kPa (c)   206 kPa                             (d)  200 kPa Answer-b (5)

(a)  Doubled                             (b)  Halved (c)   The same                           (d)  Zero Answer-c (6)

(a)  0.140 atmosphere            (b)  0.120 atmosphere (c)  0.195 atmosphere            (d) 0.212 atmosphere Answer-c (77)

(a)  760 mm                                     (b)  758.8 mm (c)  710.8 mm                                  (d)  711.2 mm Answer-d (25)

(a)  27°C                                          (b)  127°C (c)   300°C                                (d)  400°C Answer-b (10)

(a)  x                                                   (b)  (273/373)x (c) (373/273)x                                 (d)   (100/273)x Answer-b (3)

(a)  8.5 atm                               (b)  10.8 atm (c)   11.7 atm                            (d) 17 atm Answer-c (6)

(a)   Tc =(8a)/27Rb                        (b)  Tc =(a)/2Rb (c)   Tc =(8)/27Rb                          (d) Tc =(27a)/8Rb Answer-a (8)

(a)  Four times the value at 200 K (b)  Half the value at 200 K (c)   Twice the value at 200 K (d)  Same as at 200 K Answer-c (12)

(a)  20 K                                           (b)  80 K (c)   – 73 K                                       (d)  3 K Answer-a (3)

(a) 0°C                                     (b) 0 K (c)   273°C                                (d)  100°C Answer-a (4)

(a) The average momentum of the molecules (b)  The velocity of sound in the gas (c)   The number of molecules in the gas (d)  The mean square velocity of the molecules Answer-d (5)

(a) 800 K                                         (b)  1600 K (c)   2400 K                                    (d)  3200 K Answer-d (4)

(a) Proportional to √T                 (b)  Proportional to T2 (c)   Proportional to T3               (d)  Zero Answer-a (13)

24×105 dyne/cm2 , the volume of O2 is 10 litre and mass is 20 gm. The m.s. velocity will be (a) 800 m/sec                                 (b)  400 m/sec (c)   600 m/sec                        …