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CBSE Class 12 Chemistry 2019 Delhi Set 2 Solved Paper

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Question : 4
Total: 10
SECTION - B

Write two differences between an ideal solution and a non-ideal solution.
Solution:  
   Ideal solution  Non-ideal solution
 Raoult's Law  Solutions which obey Raoult's law over the entire range of concentrations.  Do not obey Raoult's law over the entire range of concentrations.
 Î”mix H  The enthalpy of mixing of the pure components to form a solution is zero.Δmix H=0  The enthalpy of mixing of pure components to form a solution is not zero. Δmix H>0
 Î”mix V  The volume of the mixing is also zero, Δmix V=0.
That means the total volume of the solution is equal to the sum of the volume of the two components.		  The volume of the mixing is not zero, Δmix V≠0.
The total volume of the solution is not equal to the sum of the volume of the two components.
 Intermolecular interactions  In pure components, A and B, the intermolecular attractions between solutesolute interactions and solvent-solvent interactions are almost similar to the solute-solvent interaction.  In pure components, A and B, the intermolecular attractions between solute-solute interactions and solvent-solvent interaction are not similar to the solute-solvent interaction.
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