Doubts
Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents
Sign in to save progress →
Doubts
Sign in

Heat and Thermodynamics question

2020 · 6 Sep · Shift 1 · Q42
Guest · try one question or challengeGuest · try one question or challenge
  1. PYQ Library
  2. /JEE Main
  3. /Physics
  4. /Heat and Thermodynamics
  5. /2020 · 6 Sep · Shift 1 · Q42

Heat and Thermodynamics question

2020 · 6 Sep · Shift 1 · Q42

JEE MainPhysicsHeat and ThermodynamicsMCQ+4 / −1
Molecules of an ideal gas are known to have three translational degrees of freedom and two rotational degrees of freedom.The gas is maintained at a temperature of T. The total internal energy, U of a mole of this gas, and the value of γ(=CpCv)\gamma \left( { = {{{C_p}} \over {{C_v}}}} \right)γ(=Cv​Cp​​) are given, respectively by:
  1. A
    U = 52RT{5 \over 2}RT25​RT and γ=75\gamma = {7 \over 5}γ=57​
  2. B
    U = 5RT and γ=65\gamma = {6 \over 5}γ=56​
  3. C
    U = 5RT and γ=75\gamma = {7 \over 5}γ=57​
  4. D
    U = 52RT{5 \over 2}RT25​RT and γ=65\gamma = {6 \over 5}γ=56​
PreviousNext

More from Heat and Thermodynamics

  • Initially a gas of diatomic molecules is contained in a cylinder of volume V1 at a pressure P1 and temperature 250 K. Assuming that 25% of the molecules get dissociated causing a change in number of moles. The pressure of the resulting gas…2020 · Numerical
  • Three rods of identical cross-section and lengths are made of three different materials of thermal conductivity K1 , K2 and K3 , respecrtively. They are joined together at their ends to make a long rod (see figure). One end of the long rod… Includes diagram2020 · MCQ
  • In a dilute gas at pressure P and temperature T, the mean time between successive collisions of a molecule varies with T as :2020 · MCQ
  • A litre of dry air at STP expands adiabatically to a volume of 3 litres. If γ = 1.40, the work done by air is : (31.4 = 4.6555) [Take air to be an ideal gas]2020 · MCQ
  • Two moles of an ideal gas with CV​CP​​=35​ are mixed with 3 moles of another ideal gas with CV​CP​​=34​. The value of CV​CP​​ for the mixture is :2020 · MCQ
  • A non-isotropic solid metal cube has coefficients of linear expansion as : 5 × 10-5/oC along the x-axis and 5 × 10-6/oC along the y and the z-axis. If the coefficient of volume expansion of the solid is C × 10-6/oC…2020 · Numerical
  • M grams of steam at 100oC is mixed with 200 g of ice at its melting point in a thermally insulated container. If it produced liquid water at 40oC [heat of vaporization of water is 540 cal/g and heat of fusion of ice is 80 cal/g] the value…2020 · Numerical
  • Under an adiabatic process, the volume of an ideal gas gets doubled. Consequently the mean collision time between the gas molecule changes from τ1​ to τ2​. If Cv​Cp​​=γ for this gas then a good…2020 · MCQ