Assertion :In an ideal solution, $Δ_{m i x} H$ is zero. Reason: In an ideal solution, A-B interactions are lower than A-A and B-B interactions.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is C Assertion is correct but Reason is incorrect
On the basis of Raoult’s Law, liquid-liquid solutions can be of two types.

They are: Either Ideal Solutions or Non-ideal Solutions.

A – A intermolecular forces of attraction

B – B intermolecular forces of attraction

A – B intermolecular forces of attraction

The solution is said to be an ideal solution, only when the intermolecular forces of attraction between A – A, B – B and A – B are nearly equal.

The enthalpy of mixing of two components should be zero, that is, $Δ_{m i x} H = 0$ .

This signifies that no heat is released or absorbed during mixing of two pure components to form an ideal solution.

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Assertion :In an ideal solution, ΔmixH is zero. Reason: In an ideal solution, A-B interactions are lower than A-A and B-B interactions.

Assertion :In an ideal solution, $Δ_{m i x} H$ is zero. Reason: In an ideal solution, A-B interactions are lower than A-A and B-B interactions.