MCQ
Choose the correct option:
  • A
    Zeroth law gives the concept of temperature.
  • B
    Temperature measures the 'hotness' of the body.
  • C
    Heat flows from higher temperature to lower temperature until thermal equilibrium is attained.
  • All of the above.

Answer

Correct option: D.
All of the above.

Heat flows from body $A$ to body $B$ because temperature of body $A$ is higher. At thermal equilibrium, $\text{T}_\text{A}'=\text{T}_\text{B}'$
$A$ in equilibrium with $C$ $A$ in equilibrium with $B$
$B$ in equilibrium with $C$

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