Q56.If a compound AB dissociates to the extent of 75% in an aqueous solution, the molality of the solution which shows a 2. 5 K rise in the boiling point of the solution is ___ molal. (Rounded-off to the nearest integer) [Kb = 0. 52K kg mol−1].
What This Question Tests
This question involves calculating the molality of a solution given its boiling point elevation, Kb, and the degree of dissociation of the solute, requiring the use of the van't Hoff factor.
Concepts Tested
Formulas Used
ΔTb = i × Kb × m
i = 1 + (n-1)α
📚 NCERT Sections This Tests
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.
1.34 — Vapour Pressure Of Water At 293 K Is 17.535 Mm Hg. Calculate The Vapour
Chemistry Class 11 · Chapter 1
1.34 Vapour pressure of water at 293 K is 17.535 mm Hg. Calculate the vapour pressure of water at 293 K when 25 g of glucose is dissolved in 450 g of water.
2.8 — The Conductivity Of 0.20 M Solution Of Kcl At 298 K Is 0.0248 S Cm–1. Calculate
Chemistry Class 11 · Chapter 2
2.8 The conductivity of 0.20 M solution of KCl at 298 K is 0.0248 S cm–1. Calculate its molar conductivity.
📋 Question Details
- Chapter
- Solutions
- Topic
- Elevation in Boiling Point
- Year
- 2021
- Shift
- 25 Feb Shift 2
- Q Number
- Q56
- Type
- Numerical
- NCERT Ref
- Class 12 Chemistry Ch 2: Solutions
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