MCQ
Asseertion: Thermodynamics processes in nature are irreversible.
Reason: Dissipative effects cannot be eliminated.
  • A
    Assertion and reason both are correct statements and reason is correct explanation for assertion.
  • B
    Assertion and reason both are correct statements but reason is not correct explanation for assertion.
  • C
    Assertion is correct statement but reason is wrong statement.
  • D
    Assertion is wrong statement but reason is correct statement.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Assertion (A): A force act upon the earth revolving in a circular orbit about the sun. Hence work should be done on the earth.
Reason (R): The necessary centripetal force for the circular motion of the earth, comes from the gravitational force between earth and the sun.
Assertion (A): If $\vec{A}$ is parallel to $\vec{B}$ then $\vec{A} \times \vec{B}$ is a null vector.
Reason (R): The magnitude cross product of two vectors is given by, $|\vec{A} \times \vec{B}|= AB \sin \theta$.
Assertion (A): Mass and energy are not conserved separately, but are conserved as a single entity called mass energy. 
Reason (R): Mass and energy conservation can be obtained by Einstein equation for energy.
Assertion: It is not possible for a system, unaided by an external agency to transfer heat from a body at lower temperature to another body at a higher temperature.
Reason: According to Clausius statement “No process is possible whose sole result is the transfer of heat from a cooled object to a hotter object.”
Assertion (A): In projectile motion, the vertical velocity of the particle is continuously decreased during its ascending motion.
Reason (R): In projectile motion near earth surface, downward constant acceleration is present in vertical direction.
Assertion (A): The force of attraction due to a hollow spherical shell of uniform density, on a point mass situated inside it is zero.
Reason (R): Various region of the spherical shell attract the point mass inside it in various directions. These forces cancel each other completely.
Assertion (A): Power developed in circular motion is always zero.
Reason (R): Work done in case of circular motion is zero.
Assertion: In an isochoric process, work done by the gas is zero.
Reason: In a process, if initial volume is equal to the final volume, work done by the gas is zero.
Assertion: An artificial satellite is moving in a circular orbit of the earth. If the gravitational pull suddenly disappears, then it moves with the same speed tangential to the original orbit.
Reason: The orbital speed of a satellite decreases with the increase in radius of the orbit.
Assertion (A): State variables are required to specify the equilibrium state of the system.
Reason (R): Pressure is an intensive state variable.