Question

In case of association, abnormal molar mass of solute will: 

• A. increase
• B. decrease
• C. remain same
• D. first increase and then decrease
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Hint:

In case of association, the abnormal molar mass tends to decrease due to the aggregation of solute molecules.

Answer 1

The Correct Option is C

Step 1: Understanding association. In case of association, solute molecules aggregate, resulting in a reduction in the number of particles in the solution. This causes the molar mass to appear lower than the expected value. 

Step 2: Conclusion. Thus, the abnormal molar mass decreases in case of association, corresponding to option (B). \vspace{10pt}