Zeroth Law of Thermodynamics — Prelims Questions

Which of the following statements correctly describes the Zeroth Law of Thermodynamics?

A thermometer (T) is placed in contact with a beaker of water (W) and reaches thermal equilibrium. Later, the same thermometer is placed in contact with a metal block (M) and shows the same reading as it did with the water. What can be concluded from this observation based on the Zeroth Law of Thermodynamics?

Which of the following concepts is directly established by the Zeroth Law of Thermodynamics?

Consider three systems, X, Y, and Z. If system X is in thermal equilibrium with system Y, and system Y is in thermal equilibrium with system Z, then according to the Zeroth Law of Thermodynamics:

Which of the following is NOT a direct consequence or implication of the Zeroth Law of Thermodynamics?

Two objects, P and Q, are in thermal contact and no net heat flows between them. Object Q is then brought into thermal contact with object R, and again, no net heat flows. What can be definitively stated about objects P and R?