Question

A system X is neither in thermal equilibrium with Y nor with Z. The systems Y and Z:

• A. must be in thermal equilibrium.
• B. cannot be in thermal equilibrium.
• C. may be in thermal equilibrium.
• D. cant be in thermal equilibrium.

Answer 1

The correct option is C may be in thermal equilibrium.

By zeroth law of thermodynamics, there are three parts to the system.

Let's say $x,y,z$

It is given that in the question is, $A$ system $Y$ is neither in thermal equilibrium with $Y$ nor with $Z$.

But, their is possibility by Zeroth law of theromodynamics that $Y$ and $Z$ may be in thermol eqyuilibrium.

$\therefore$ Correct option is C.