Neet 2005 PYQ Free Mock Test

Assertion: Reversible systems are difficult to find in real world.Reason: Most processes are dissipative in nature.

Assertion: For a system of particles under central force field, the total angular momentum is conserved.Reason: The torque acting on such a system is zero.

Assertion: Air quickly leaking out of a balloon becomes cooler.Reason: The leaking air undergoes adiabatic expansion.

Assertion: It is not possible to use ${}^{35}\text{Cl}$ as the fuel for fusion energy.Reason: The binding energy of ${}^{35}\text{Cl}$ is too small.

Assertion: The number of electrons in a $p$ -type silicon semiconductor is less than the number of electrons in a pure silicon semiconductor at room temperature.Reason: It is due to law of mass action.