OnlineCBT
Chemistry · THERMODYNAMICS
हिन्दीConsider the following statements regarding spontaneity and entropy: (A) Natural processes proceed spontaneously in a unidirectional manner. (B) In an isolated system, the system's energy has a tendency to become more disordered or chaotic. (C) Spontaneous physical or chemical changes are always accompanied by an evolution of heat (\( \Delta H < 0 \)). (D) Entropy (\( S \)) is a thermodynamic function that serves as a measure of disorder or randomness in a system. How many of the above statements are correct?
Correct answer · Option 4
Only three
Explanation
Statements (A), (B), and (D) are correct. Statement (C) is incorrect because endothermic reactions and processes with \( \Delta H = 0 \) (e.g. gas diffusion) can also be spontaneous.
