(a) 1 : 10 (b) 1 : 15 (c) 1 : 20 (d) 1 : 25 Ans. c (5)
(a) Energy is released (b) Energy is absorbed (c) The surface area of the bigger drop is greater than the sum of the surface areas of both the drops (d) The surface area of the bigger drop is smaller than …
(a) Less than 1 eV (b) A few keV (c) 50-60 eV (d) 13.6 eV Answer-a (11)
(a) 137°C (b) 127°C (c) 100°C (d) 105°C Answer-a (8)
(a) Becomes zero (b) Becomes maximum (c) Becomes minimum (d) Remains constant Answer-a (8)
(a) (1/2)PV (b) (3/2)PV (c) (5/2)PV (d) 3PV Answer-b (7)
(a) 16 : 1 (b) 1 : 8 (c) 8 : 1 (d) 1 : 1 Answer-d (20)
(a) Double (b) Half (c) One fourth (d) Four times Answer-d (4)
H2 and He gases. Which of the following statements are corrects (a) The average translational kinetic energies of H2 molecules and He atoms are same (b) The average energies of H2 molecules and He atoms are same (c) H2 molecules have greater …
(a) Total number of molecules (b) Average kinetic energy (c) Root mean square velocity (d) Mean free path Answer-b (11)
(a) Kinetic energy (b) Potential energy (c) Vibrational energy (d) Density Answer-a (4)
(a) (nkT)/N (b) (nkT)/(2N) (c) (nkT)/2 …
O2 (molar mass 32) molecules at a particular temperature is 0.048 eV. The translational kinetic energy of N2 (molar mass 28) molecules in eV at the same temperature is (a) 0.0015 (b) 0.003 (c) 0.048 …
6.21×10-21 J . Its average kinetic energy at 227°C will be (a) 52.2×10-21 J (b) 5.22×10-21 J (c) 10.35×10-21 J …
E1 . If the temperature is increased to 327°C, then kinetic energy would be (a) 2E1 (b) (1/2)E1 …
(a) (3/2)RT (b) (2/3)RT (c) (1/2)RT …
(a) All are correct (b) I and IV are correct (c) IV is correct (d) None of these Answer-d (7)
(a) 54°C (b) 300 K (c) 327°C (d) 108°C Answer-c (6)
(a) 100 J (b) 3000 J (c) 450 J (d) 150 J Answer-d (23)
(a) (3RT)/(2N) (b) (3RT)/(2M) (c) (3RT)/2 …
(a) 2490 joules (b) 2490 ergs (c) 830 joules (d) 124.5 joules Answer-a (10)
(a) 40°C (b) 80°C (c) 313°C (d) 586°C Answer-c (8)
(a) 3 RT (b) (5/2) RT (c) (3/2) RT (d) (1/2) RT Answer-b (4)
(a) Is proportional to the square root of the absolute temperature of the gas (b) Is proportional to the absolute temperature of the gas (c) Is proportional to the square of the absolute temperature of the gas (d) Does not …
(a) Halved (b) Unchanged (c) Doubled (d) Increased by factor √2 Answer-c (16)
(a) (3/2)RT (b) (1/2)KT (c) (1/2)RT …
(a) The number of molecules in the gas (b) The pressure of the gas only (c) The temperature of the gas only (d) None of the above is enough by itself Answer-c (12)
(a) Potential energy (b) Kinetic energy (c) Both (a) and (b) (d) None of the above Answer-b (7)
(a) 3 : 2 (b) 2 : 3 (c) 2 : 21 (d) 4 : 9 Answer-b (9)
(a) 1 : 16 (b) 1 : 8 (c) 1 : 4 (d) 1 : 1 Answer-d (9)
5×10-14 erg for H2 . The mean kinetic energy of the O2 at 227°C and 150 cm pressure will be (a) 80×10-14 erg (b) 20×10-14 …
(a) P/4 (b) P/2 (c) P/8 (d) P Answer-b (5)
H2 are double than that of O2 , then ratio of kinetic energy of hydrogen and that of oxygen at 300 K is (a) 1 : 1 …
U1 and U2 respectively. U1:U2 is (a) 5 : 3 (b) 3 : 5 (c) 1 : 1 (d) 5 : 7 Answer-c …
(a) 480 J (b) 4980 J (c) 2490 J (d) The information is incomplete Answer-c (9)
(a) P=(3/2)EV (b) V=(3/2)PE (c) PV=(3/2)E (d) PV=(2/3)E Answer-d (6)
(a) 2mV (b) mV (c) – mV (d) Zero Answer-a (22)
(a) 60% and 40% (b) 40% and 60% (c) 50% and 50% (d) 100% and 0% Answer-d (4)
(a) 1/ρ 2 (b) 1/ρ (c) ρ2 …
0°C is 3180 metres/second. The pressure on the hydrogen gas is (Density of hydrogen gas is 8.99×10-2 kg/m3 , 1 atmosphere =1.01×105 N/m2 (a) 1.0 atm (b) 1.5 atm (c) 2.0 atm …