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Ideal and Non-Ideal Solutions | Solutions | Class 12 Chemistry | NEET | IIT-JEE | CUET | MCQs

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📘 Important MCQs on Ideal and Non-Ideal Solutions:( 90% Excelent , 80% Good )

Which of the following statements is true for an ideal solution? a) Obeys Raoult’s Law
b) Shows positive deviation from Raoult’s Law
c) Shows negative deviation from Raoult’s Law
d) None of the above

Which of the following is a characteristic of non-ideal solutions? a) No heat change during mixing
b) Strong solute-solvent interactions
c) Deviations from Raoult’s Law
d) Mole fractions remain constant

What is the condition for a solution to be considered ideal? a) ΔHmix = 0
b) ΔVmix = 0
c) It follows Raoult’s Law at all concentrations
d) All of the above

Which of the following is NOT an example of an ideal solution? a) Benzene and toluene
b) Ethanol and water
c) n-Hexane and n-Heptane
d) Chlorobenzene and bromobenzene

A solution that shows positive deviation from Raoult’s Law has: a) Higher vapour pressure than predicted
b) Lower vapour pressure than predicted
c) No deviation in vapour pressure
d) Vapour pressure equal to Raoult’s Law predictions

In a non-ideal solution showing negative deviation, the intermolecular forces between solute and solvent are: a) Weaker than in pure components
b) Stronger than in pure components
c) The same as in pure components
d) Absent

Which one of the following solutions exhibits negative deviation from Raoult’s Law? a) Acetone and ethanol
b) Acetone and benzene
c) Chloroform and acetone
d) Ethanol and water

In an ideal solution, the enthalpy change of mixing (ΔHmix) is: a) Positive
b) Negative
c) Zero
d) Unpredictable

What is the volume change on mixing in an ideal solution? a) Increases
b) Decreases
c) Zero
d) Depends on components

Which of the following is an example of a non-ideal solution showing positive deviation from Raoult’s Law? a) Acetone and water
b) Ethanol and water
c) Carbon tetrachloride and chloroform
d) Ethanol and cyclohexane

Which of the following is true for a non-ideal solution with negative deviation? a) ΔHmix is positive
b) ΔHmix is negative
c) ΔVmix is positive
d) ΔS decreases

When two liquids are mixed and the temperature of the solution increases, the solution shows: a) Positive deviation from Raoult's Law
b) Negative deviation from Raoult's Law
c) Ideal behavior
d) Non-colligative behavior

In which type of solution is the partial vapour pressure of each component directly proportional to its mole fraction? a) Non-ideal
b) Ideal
c) Azeotropic
d) Immiscible

Which type of solution forms an azeotrope? a) Ideal solution
b) Non-ideal solution with large deviations
c) Non-ideal solution with small deviations
d) Any solution

Which of the following is NOT true for an ideal solution? a) Obeys Raoult’s Law
b) ΔHmix = 0
c) ΔVmix = 0
d) Exhibits azeotropic behavior

Which of the following pairs of liquids is expected to form an ideal solution? a) Acetone and chloroform
b) Benzene and toluene
c) Water and ethanol
d) Ethanol and cyclohexane

In non-ideal solutions with negative deviation, the vapour pressure is: a) Higher than predicted by Raoult’s Law
b) Lower than predicted by Raoult’s Law
c) Equal to the predicted value
d) Unrelated to Raoult’s Law

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