(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 (6)
(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 (18)
(a) 60% and 40% (b) 40% and 60% (c) 50% and 50% (d) 100% and 0% Answer-d (3)
(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 …
H2 gas. The total average kinetic energy of translatory motion of its molecules 1.5×105 J is . The pressure of hydrogen in the cylinder is (a) 2×106N/m2 …
(a) P =(1/2) E (b) P = E (c) P =(3/2) E (d) P =(2/3) E Answer-d (4)
(a) Pressure will decrease (b) Pressure will remain unchanged (c) Pressure will be doubled (d) Pressure will become three times Answer-c (4)
P0 in contained is a vessel. If the masses of all the molecules are halved and their speeds are doubled, the resulting pressure P will be equal to (a) 4P0 …
(a) It loses kinetic energy (b) It sticks with the walls (c) On collision with the walls there is a change in momentum (d) It is accelerated towards the walls Answer-c (9)
(a) 1 (b) 1.5 (c) 1.53 (d) 1.33 Answer-b (24)
Cp/Cv of the mixture is (a) 1.4 (b) 1.54 (c) 1.59 (d) 1.62 Answer-d (6)
(a) One (b) Two (c) Three (d) Four Answer-c (4)
R/Cp for diatomic gas (a) 3/4 (b) 3/5 (c) 2/7 (d) 5/7 Answer-c (11)
(a) 200 cal (b) 300 cal (c) 100 cal (d) None of these Answer-b (20)
(a) (1+n)/2 (b) 1+(1/n) (c) 1+(n/2) (d) 1+(2/n) Answer-d (11)
(a) Helium (b) Hydrogen (c) Argon (d) Neon Answer-b (9)
(a) (3γ-1)/ (2γ-1) (b) 2/(γ-1) (c) (9/2)(γ-1) (d) (25/2)(γ-1) Answer-b (2)
CP and Cv of the gas is 1.98 cal/gm mole K. From this data, the value of J is (a) 4.16 J/cal (b) 4.18 J/cal (c) 4.20 J/cal (d) …
(a) 2 (b) 3 (c) 5 (d) 6 Answer-b (6)
(a) kT (b) k/T (c) T/k (d) 1/kT Answer-a (4)
(a) Monoatomic (b) Diatomic (c) Same for both (d) Can not be predicted Answer-a (5)
Cv and Cp of a gas has been reported by different students. The units are cal/gm-mole-K. Which of these sets is most reliable (a) Cv =3 ,Cp =5 …
constant volume for NH3 (a) 1.33 (b) 1.44 (c) 1.28 (d) 1.67 Answer-a (7)
(a) Cp+Cv=R (b) Cp – Cv=R (c) Cp /Cv=R (d) Cv+Cp=R Answer-b (11)
(in JK-1 mol-1) at constant volume is (R=8.3JK-1 mol-1 ) (a) 18.7 (b) 18.9 (c) 19.2 (d) None of the above Answer-a (6)
[γ=(5/3)] is mixed with one mole of diatomic gas [γ=(5/3)]. What is γ for the mixture? γ denotes the ratio of specific heat at constant pressure, to that at constant volume (a) 3/2 (b) 23/15 (c) 35/23 (d) 4/3 Answer-a …
(Cp) and at constant volume (Cv) which is correct (a) Cp of hydrogen gas is (5/2)R (b) Cv of hydrogen gas is (7/2)R (c) H2 has very small values of Cp and Cv (d) Cp – Cv = 1.99 cal/mole–K for …
(a) (3/2)R (b) (5/2)R (c) (7/2)R (d) 4R …
(a) 8475 J/kg K (b) 5186J/kg K (c) 1660 J/kg K (d) 10375 J/kg K Answer-d (42)