The statement that ‘heat cannot flow by itself from a body at a lower

The statement that ‘heat cannot flow by itself from a body at a lower temperature to a body at a higher temperature’, is known as

[amp_mcq option1=”Zeroth law of thermodynamics” option2=”First law of thermodynamics” option3=”Second law of thermodynamics” option4=”Third law of thermodynamics” correct=”option3″]

This question was previously asked in
UPSC NDA-2 – 2017
The correct answer is Second law of thermodynamics.
The statement that ‘heat cannot flow by itself from a body at a lower temperature to a body at a higher temperature’ is one of the standard formulations (specifically, the Clausius statement) of the Second Law of Thermodynamics. It describes the natural direction of heat flow.
The Zeroth law of thermodynamics defines thermal equilibrium and establishes temperature as a property. The First law of thermodynamics is a statement of the conservation of energy, relating heat, work, and internal energy. The Third law of thermodynamics deals with the entropy of a system at absolute zero temperature.