(a) Increase continuously (b) Decreases continuously (c) First increases and then decreases (d) First increase and then becomes constant Answer-c (4)
CO2 mixture at 27°C. If R = 8.31 J/mole kelvin, then the pressure in the vessel in N/m2 will be (approx.) (a) 5×105 (b) 5×104 (c) 106 …
(a) The internal energy changes in all processes (b) Internal energy and entropy are state functions (c) The change in entropy can never be zero (d) The work done in an adiabatic process is always zero (19)
(a) 100 J (b) 3000 J (c) 450 J (d) 150 J Answer-d (17)
(a) Transfer momentum to the walls (b) Momentum becomes zero (c) Move in opposite directions (d) Perform Brownian motion Answer-a (25)
(a) Volume (b) Temperature (c) Pressure (d) Work Ans. d (4)
is Cp=3.4 x 103 cal/kg 0c and at constant volume is Cv= 2.4 x103 cal/kg 0c. If one kilogram hydrogen gas is heated from 10 0c to 200c at constant pressure, the external work done on the gas to maintain …
(a) The temperature will decrease (b) The volume will increase (c) The pressure will remain constant (d) The temperature will increase Ans. a (7)
(a) Pressure and volume (b) Volume and temperature (c) Temperature and pressure (d) Any one of pressure, volume or temperature Ans. d (12)
(a) Q=W=0 and ΔEint =0 (b) Q=0,W>0 and ΔEint =-W (c) W=0,Q>0, and ΔEint = Q (d) W>0,Q<0 and ΔEint =0 Ans. a (8)
(a) ΔQ= ΔU + ΔW (b) ΔQ= ΔU – ΔW (c) ΔQ= ΔW-ΔU (d) ΔQ= – ΔW-ΔU Ans. b (6)
(a) 260 J (b) 150 J (c) 110 J (d) 40 J Ans. d (8)
(a) 260 J (b) 150 J (c) 110 J (d) 40 J Ans. d (7)
(a) Remains constant (b) Becomes zero (c) Increases (d) Decreases Ans. a (6)
(a) 100 J (b) 300 J (c) 419 J (d) 24 J Ans. b (7)
(a) ΔQ (b) ΔW (c) ΔQ + ΔW (d) ΔQ-ΔW Ans. d (7)
(a) System can do work (b) System has temperature (c) System has pressure (d) Heat is a form of energy Ans. d (7)
(a) 166 cal (b) 333 cal (c) 500 cal (d) 400 cal Ans. c (3)
(a) Specific volume (b) Pressure (c) Temperature (d) Density Ans. c (11)
(a) 100 R (b) 150 R (c) 300 R (d) 500 R Ans. c (8)
(a) Initial state only (b) Final state only (c) Both initial and final states only (d) Initial state, final state and the path Ans. d (9)
(a) 654 Joule (b) 156.5 Joule (c) – 300 Joule (d) – 528.2 Joule Ans. a (6)
(i) P1 , V to 2P1 , V (ii) P1, V to P, 2V. Then work done in the two cases is (a) Zero, Zero (b) Zero, PV1 (c) PV1 , Zero (d) PV1, P1 V1 Ans. b (11)
(a) -50 joules (b) 20 joules (c) 30 joules (d) 50 joules Ans. d (5)
(a) Momentum (b) Energy (c) Mass (d) Temperature Ans. b (5)
(a) Decreases (b) Increases (c) Remains constant (d) Depends on the molecular motion Ans. c (19)
(a) – 50 J (b) 20 J (c) 30 J (d) 50 J Ans. b (6)
(a) Q + W (b) Q – W (c) Q (d) (Q – W)/2 Ans. b (2)
area 0.05 m2. Increase in its potential energy will be (T = 0.2 N/m) (a) 5 x 10-2J (b) 2 x 10-2j (c) 3 …
(a) 24πR2S (b) 48 πR2S (c) 12πR2S (d) 36πR2S Ans. a (5)
(a) dQ = dU + PdV (b) dQ = dU x Pdv (c) dQ = (dU + dv)P (d) dQ = PdU + dV Ans. a (10)
(a) r (b) 0 (c) Infinity (d) 1/2r Ans. c (13)
(a) 3 J (b) 6.5 J (c) 1.5 J (d) 4 J Ans. a (7)
(a) 192π x 10-4 J (b) 280π x 10-4 J (c) 200π x 10-3 J (d) None of these Ans. a (12)
(a) 1:21/3 (b) 21/3:1 (c) 2 : 1 (d) 1 : 2 Ans. b (10)
the increase in surface energy. (Surface tension of mercury is 0.465 J/m2 ) (a) 23.4 μJ (b) 18.5 μJ (c) 26.8 μJ …
(a) 0.56×104 J (b) 1.3×102 J (c) 2.7×102 J …
6.21×10-21 J and 484 m/s respectively. The corresponding values at 600 K are nearly (assuming ideal gas behaviour) (a) 12.42×1021 J,968 m/s (b) 8.78×1021 J,684 m/s (c) 6.21×1021 J,968 m/s …
how much work will have to be done (Surface tension of water =7.2 x10-2 N/m) (a) 7.2 x 10-6 Joule (b) 1.44 x 10-5 Joule (c) 2.88 x 10-5 Joule (d) 5.76 x 10-5 Joule …
(a) Released (b) Absorbed (c) Both (a) and (b) (d) None of these Ans. a (12)
