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 · 5 Sep · Shift 1 · Q56
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 · 5 Sep · Shift 1 · Q56

Heat and Thermodynamics question

2020 · 5 Sep · Shift 1 · Q56

JEE MainPhysicsHeat and ThermodynamicsMCQ+4 / −1
Number of molecules in a volume of 4 cm3 of a perfect monoatomic gas at some temperature T and at a pressure of 2 cm of mercury is close to? (Given, mean kinetic energy of a molecule (at T) is 4 ×\times× 10–14 erg, g = 980 cm/s2, density of mercury = 13.6 g/cm3)
  1. A
    5.8 ×\times× 1018
  2. B
    4.0 ×\times× 1016
  3. C
    5.8 ×\times× 1016
  4. D
    4.0 ×\times× 1018
PreviousNext

More from Heat and Thermodynamics

  • Three different processes that can occur in an ideal monoatomic gas are shown in the P vs V diagram. The paths are labelled as A → B, A → C and A → D. The change in internal energies during these process are taken as EAB, EAC… Includes diagram2020 · MCQ
  • Nitrogen gas is at 300oC temperature. The temperature (in K) at which the rms speed of a H2 molecule would be equal to the rms speed of a nitrogen molecule, is ​. (Molar mass of N2 gas 28 g).2020 · Numerical
  • In an adiabatic process, the density of a diatomic gas becomes 32 times its initial value. The final pressure of the gas is found to be n times the initial pressure. The value of n is :2020 · MCQ
  • Two different wires having lengths L1 and L2, and respective temperature coefficient of linear expansion α 1 and α 2, are joined end-to-end. Then the effective temperature coefficient of linear expansion is :2020 · MCQ
  • 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(=Cv​Cp​​)…2020 · MCQ
  • 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