Q47.A molecule M associates in a given solvent according to the equation M ⇌(M)n . For a certain concentration of M, the van't Hoff factor was found to be 0.9 and the fraction of associated molecules was 0.2. The value of n is: (1) 3 (2) 5 (3) 2 (4) 4
What This Question Tests
This question requires applying the formula for the van't Hoff factor in the case of molecular association to calculate the aggregation number 'n'.
Concepts Tested
Formulas Used
i = 1 - α + α/n
📚 NCERT Sections This Tests
1.3 — Define The Following Terms:
Chemistry Class 11 · Chapter 1
1.3 Define the following terms: (i) Mole fraction (ii) Molality (iii) Molarity (iv) Mass percentage.
1.32 — Calculate The Depression In The Freezing Point Of Water When 10 G Of
Chemistry Class 11 · Chapter 1
1.32 Calculate the depression in the freezing point of water when 10 g of CH3CH2CHClCOOH is added to 250 g of water. Ka = 1.4 × 10–3, Kf = 1.86 K kg mol–1. 1.33 19.5 g of CH2FCOOH is dissolved in 500 g of water. The depression in the freezing point of water observed is 1.00 C. Calculate the van’t Hoff factor and dissociation constant of fluoroacetic acid.
2.7 — Define Conductivity And Molar Conductivity For The Solution Of An Electrolyte.
Chemistry Class 11 · Chapter 2
2.7 Define conductivity and molar conductivity for the solution of an electrolyte. Discuss their variation with concentration.
📋 Question Details
- Chapter
- Solutions
- Topic
- Van't Hoff factor for association
- Year
- 2013
- Shift
- 22 Apr Online
- Q Number
- Q47
- Type
- Numerical
- NCERT Ref
- Class 12 Chemistry Ch 2: Solutions
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