Question

Consider four objects,
A,
B,
C,
and D. It is found that A
and B
are in thermal equilibrium. It is also found that C
and D
are in
thermal equilibrium. However,
A
and C
are not
in thermal
equilibrium. One can conclude that
(A)
B
and D
are in thermal equilibrium.
(B)
B
and D
could be in thermal equilibrium,
but might not
be.
(C)
B
and D
cannot be in thermal equilibrium.
(D)
the zeroth law of thermodynamics does not apply here,
because there are more than three objects.​

Answer 1

Answer:

(C) B and D Cannot be in thermal equilibrium

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Answer 2

Given that,

Four objects A, B. C and D. It is found that A and B are in thermal equilibrium. It is also found that C and D are in thermal equilibrium.

But A and C are not in thermal equilibrium.

Thermal equilibrium :

When no heat flows between two objects that means both objects are in thermal equilibrium.

The system follows the zeroth law of thermodynamics it means system is thermal equilibrium.

Thermal equilibrium system is defined as when the temperature of the system is uniform.

If A, B and C, D are in thermal equilibrium but A and C are not in thermal equilibrium.

Hence, B and D cannot be in thermal equilibrium.

(C) is correct option.