Directions : Read the following information and answer the questions given below it Six students A, B, C, D, E and F are sitting in the field. A and B are from Nehru House while the rest belong to Gandhi …
Q. In a cricket season, India defeated Australia twice, West Indies defeated India twice, Australia defeated West Indies twice, India defeated New Zealand twice, and West Indies defeated New Zealand twice. Which country has lost most number of times? ਕ੍ਰਿਕੇਟ …
Directions : Study the following information and answer the questions given below it: (i) Kailash, Govind and Harinder are intelligent. (ii) Kailash, Rajesh and Jitendra are hard-working. (iii) Rajesh, Harinder and Jitendra are honest. (iv) Kailash, Govind and Jitendra are …
Directions Study the following information carefully to answer the given questions: Madan and Rohit are in the same team of hockey. Parth defeated Rohit in badminton but lost to Sachin in tennis. Nitin teams with Sagar in football and with …
T1 and T2 has an efficiency η, the new efficiency if both the source and sink temperature are doubled, will be (a) η/2 (b) η …
Directions : Read the following information carefully and answer the question given below: ਹੇਠ ਲਿਖੀ ਜਾਣਕਾਰੀ ਨੂੰ ਧਿਆਨ ਨਾਲ ਪੜ੍ਹੋ ਅਤੇ ਪ੍ਰਸ਼ਨਾਂ ਦੇ ਉਤਰ ਦਿਓ। Ravi and Kunal are good in Hockey and Volleyball. Sachin and Ravi are good in …
(a) 100 J (b) 300 J (c) 500 J (d) 700 J Answer-c (14)
(a) 227°C (b) 327°C (c) 127°C (d) 27°C Answer-c (192)
T1 and sink temperature is T2 will be (a) (T1 – T2)/ T1 (b) (T2 –T1 )/T2 (c) (T1 – T2)/ T2 …
(a) 80 K, 60 K (b) 100 K, 80 K (c) 60 K, 40 K (d) 40 K, 20 K Answer-d (12)
(a) Isothermal expansion (b) Adiabatic expansion (c) Isothermal compression (d) Adiabatic compression Answer-a (22)
3×106 cal. of heat from a reservoir at 627°C, and gives it to a sink at 27°C. The work done by the engine is (a) 4.2×106 J …
(a) Second law of thermodynamics (b) Conservation of momentum (c) Conservation of mass (d) First law of thermodynamics Answer-a (9)
(a) Prevent radiation (b) Find ideal sources (c) Reach absolute zero temperature (d) Eliminate friction Answer-c (7)
(a) 200 K (b) 400 K (c) 600 K (d) 800 K Answer-b (7)
(a) 1.73 : 1 (b) 1 : 1.73 (c) 1 : 1 (d) 1 : 2 Answer-b (6)
(a) It is impossible (b) It is possible but less probable (c) It is quite probable (d) Data are incomplete Answer-a (7)
(a) 1000 K (b) 960 K (c) 846 K (d) 754 K Answer-b (6)
(a) Isobaric (b) Isotropy (c) Enthalpy (d) Entropy Answer-d (9)
(a) 1/3 (b) 2/5 (c) 3/4 …
(a) 50% (b) 24% (c) 0.75% (d) 0.4% Answer-a (2)
T2=0°C and T1=200°C its efficiency is η1 and when T1=0°C and T2=200°C , Its efficiency is η2 , then what is η1 / η2 (a) 0.577 (b) 0.733 (c) 0.638 …
(a) 300 K (b) 400 K (c) 500 K (d) 700 K Answer-a (3)
(a) Q / 4 (b) Q / 3 (c) Q / 2 (d) 2Q / 3 Answer-b (2)
(a) Isothermal (b) Adiabatic (c) Isobaric (d) None of these Ans. a (13)
27°C has a movable piston which maintains at constant pressure in container of 1 atm. The gas is compressed until temperature becomes 127°C. The work done is (Cp for gas is 7.03 cal/mol–K) (a) 703 J …
(a) T2 =273K (b) T2 =0 K (c) T1 =273K (d) T1 =0 K Answer-b (5)
(a) 127°C (b) 227°C (c) 327°C (d) 673°C Answer-b (6)
6 × 104 J at high temperature. The amount of heat converted into work is …. (a) 4.8 × 104 J (b) 3.5 × 104 J (c) 1.6 × 104 J (d) 1.2 × 104 J Answer-d (3)
(a) Zero (b) Equal to heat given to the system (c) More than the heat given to system (d) Independent of heat given to the system Answer-b (12)
(a) In the whole cycle of the system, the loss of any type of heat energy should be zero (b) That the process should be too fast (c) That the process should be slow so that the working substance …
(a) Adiabatic process (b) Joule-Thomson expansion (c) Ideal isothermal process (d) None of the above Answer-b (13)
(a) Increases (b) Decreases (c) Remains constant (d) Becomes zero Explanation-(c) Internal energy is a state function. (10)
(a) Room is cooled (b) Room is heated (c) Room is either cooled or heated (d) Room is neither cooled nor heated Explanation-(b) In a refrigerator, the heat dissipated in the atmosphere is more than that taken from the cooling …
(a) 10 (b) 1 (c) 9 (d) 0 Answer-c (4)
(a) 1800 J/cycle (b) 1000 J/cycle (c) 2000 J/cycle (d) 1600 J/cycle Answer-d (3)
(a) ΔQ = ΔU (b) ΔW = ΔU (c) ΔQ = ΔW (d) None of these Ans. a (16)
(a) In an isobaric process, ΔP =0 (b) In an isochoric process, ΔW = 0 (c) In an isothermal process, ΔT = 0 (d) In an isothermal process, ΔQ = 0 Ans. d (30)
if T1 = 270C and T2 = 1270C , then P1/P2 will be equal to (a) 9 / 59 (b) 2 / 3 (c) 3 / 4 …
(a) Isobaric (b) Isothermal (c) Adiabatic (d) Isochoric Ans. d (7)