Ajneesh
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Aug 24, 2022
V1 to V2 for a gas which obeys Vander Waal’s equation (V-βn)[P+(αn2/V)]=nRT (a) nRT loge [ (V2-nβ)/( V1-nβ) ]+αn2[(V1 –...
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Aug 24, 2022
V1 to V2 and then compressed to original volume V1 adiabatically. Initial pressure is P1 and final pressure is P3...
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Aug 24, 2022
(a) 4 RT (b) 15 RT (c) 9 RT (d) 11 RT Answer-d (6)
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Aug 24, 2022
(a) (2/3)Q (b) (3/5)Q...
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Aug 24, 2022
at 00C and also contains an insulated piston of negligible weight and negligible thickness at the middle point. The gas...
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Aug 24, 2022
T1, is enclosed in a cylinder fitted with a frictionless piston. The gas is allowed to expand adiabatically to a...
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Aug 24, 2022
The mass of the gas in A is mB and that in B is . The gas in each cylinder...
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Aug 24, 2022
(a) Transfer of heat by radiation (b) Electrical heating of a nichrome wire (c) Transfer of heat by conduction (d) ...
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Aug 24, 2022
(a) Positive work is done by ice-water system on the atmosphere (b) Positive work is done on the ice-water system...
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Aug 24, 2022
volume of 1671 cm3 .If the atmospheric pressure = 1.013 x 105 N/m3 and the mechanical equivalent of heat =...
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Aug 24, 2022
between 227°C and 127°C. It absorbs 6 x 104 cals of heat at higher temperature. Amount of heat converted to...
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Aug 24, 2022
at temperature 727°C and 227°C. The maximum possible efficiency of such an engine is (a) 1/2 (b) 1/4 (c) ...
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Aug 24, 2022
of – 23°C and the compressed gas in the condenser has a temperature of 27°C. The theoretical coefficient of performance...
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Aug 24, 2022
-130c . The coefficient of performance of the engine is 5. The temperature of the air (to which heat is...
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Jul 7, 2022
T1 and T2 has an efficiency η, the new efficiency if both the source and sink temperature are doubled, will...
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Jul 7, 2022
(a) 100 J (b) 300 J (c) 500 J (d) 700 J Answer-c (15)
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Jul 7, 2022
(a) 227°C (b) 327°C (c) 127°C ...
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Jul 7, 2022
T1 and sink temperature is T2 will be (a) (T1 – T2)/ T1 ...
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Jul 7, 2022
(a) 80 K, 60 K (b) 100 K, 80 K (c) 60 K, 40 K ...
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Jul 7, 2022
(a) Isothermal expansion (b) Adiabatic expansion (c) Isothermal compression (d) Adiabatic compression Answer-a (22)
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Jul 7, 2022
3×106 cal. of heat from a reservoir at 627°C, and gives it to a sink at 27°C. The work done...
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Jul 7, 2022
(a) Second law of thermodynamics (b) Conservation of momentum (c) Conservation of mass (d) First law of thermodynamics...
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Jul 7, 2022
(a) Prevent radiation (b) Find ideal sources (c) Reach absolute zero temperature (d) Eliminate friction Answer-c (8)
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Jul 7, 2022
(a) 1.73 : 1 (b) 1 : 1.73 (c) 1 : 1 ...
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Jul 7, 2022
(a) It is impossible (b) It is possible but less probable (c) It is quite probable (d) Data are...
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Jul 7, 2022
(a) 1000 K (b) 960 K (c) 846 K ...
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Jul 7, 2022
(a) Isobaric (b) Isotropy (c) Enthalpy (d) Entropy Answer-d (10)
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Jul 7, 2022
(a) 1/3 ...
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Jul 7, 2022
(a) 50% (b) 24% (c) 0.75% ...
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Jul 7, 2022
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...
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Jul 7, 2022
(a) 300 K (b) 400 K (c) 500 K ...
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Jul 7, 2022
(a) Q / 4 (b) Q / 3 (c) Q / 2 (d) 2Q / 3 Answer-b (3)
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Jul 7, 2022
(a) Isothermal (b) Adiabatic (c) Isobaric (d) None...
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Jul 7, 2022
27°C has a movable piston which maintains at constant pressure in container of 1 atm. The gas is compressed until...
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Jul 7, 2022
(a) T2 =273K (b) T2 =0 K (c) T1 =273K (d) T1...
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Jul 7, 2022
(a) 127°C (b) 227°C (c) 327°C (d) 673°C Answer-b (7)
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Jul 7, 2022
6 × 104 J at high temperature. The amount of heat converted into work is …. (a) 4.8 × 104 J...
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Jul 7, 2022
(a) Zero (b) Equal to heat given to the system (c) More than the heat given to system (d) Independent...