For an ideal solution,the correct option is

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(C) An ideal solution is defined as a solution that obeys Raoult's law over the entire range of concentration.For an ideal solution,the enthalpy of mi

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$\Delta_{mix} H = 0$ at constant $T$ and $P$

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(C) An ideal solution is defined as a solution that obeys Raoult's law over the entire range of concentration.For an ideal solution,the enthalpy of mixing is zero,i.e.,$\Delta_{mix} H = 0$.Also,the volume of mixing is zero,i.e.,$\Delta_{mix} V = 0$.However,the entropy of mixing $(\Delta_{mix} S)$ is always greater than zero for any mixing process,and the Gibbs free energy of mixing $(\Delta_{mix} G)$ is always less than zero for a spontaneous process.

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