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Chemistry · 2023 · 1 mark
CBSE 2023 · Region 2 · Set 3 · Q15
Assertion (A): The enthalpy of mixing Δ_mix H is equal to zero for an ideal solution. Reason (R): For an ideal solution the interaction between…
Assertion (A) : The enthalpy of mixing $\displaystyle \Delta_{\text {mix }} \mathrm{H}$ is equal to zero for an ideal solution.
Reason (R) : For an ideal solution the interaction between solute and solvent molecules is stronger than the interactions between solute- solute or solvent-solvent molecules.
Official answer
(C)
(A) is true, but (R) is false.
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CBSE Class 12 Chemistry past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.