COMEDK · Chemistry · 17. Solutions
A solute \(\mathrm{X}\) is found to exist as a dimer in water. A 4 molal solution of \(\mathrm{X}\) shows a boiling point of \(101.04^{\circ} \mathrm{C}\). What is the percentage association of \(\mathrm{X}\) ? (\(\mathrm{K}_{\mathrm{b}}\) for water \(=0.52 \mathrm{~K} / \mathrm{m}\)).
- A 75
- B 80
- C 100
- D 40
Answer & Solution
Correct Answer
(C) 100
Step-by-step Solution
Detailed explanation
The elevation in boiling point is given by \(\Delta T_b = T_b - T_b^{\circ} = 101.04^{\circ} \text{C} - 100^{\circ} \text{C} = 1.04 \text{ K}\). Using the formula \(\Delta T_b = i K_b m\), where \(i\) is the van't Hoff factor, \(K_b = 0.52 \text{ K kg mol}^{-1}\), and…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- 5.0 moles of an Ideal gas at 3.0 atm pressure and \(27^{\circ} \mathrm{C}\) is compressed isothermally to half its volume by application of an external pressure of \(3.5 \mathrm{~atm}\). What is the amount of work done (in joules) on the gas?
Given: \(1 \mathrm{~L} \mathrm{~atm}=101.3 \mathrm{~J}: \mathrm{R}=0.082 \mathrm{~L} \mathrm{~atm} \mathrm{~K}{ }^{-1} \mathrm{~mol}^{-1}\)COMEDK 2024 Medium - Two gas cylinders having same capacity have been filled with \(44 \mathrm{~g}\) of \(\mathrm{H}_{2}\) and \(44 \mathrm{~g}\) of \(\mathrm{CO}_{2}\) respectively. If the pressure in \(\mathrm{CO}_{2}\) cylinder is \(1\) atmosphere at a particular temperature. The pressure in the hydrogen cylinder at the same temperature isCOMEDK 2013 Medium
- Which metal is used to make alloy steel for armour plates, safes and helmets ?COMEDK 2013 Easy
- Which among the following given reagent is widely used for detection of sulphide ion?COMEDK 2024 Easy
- In the metallurgy of aluminium, when the fused matrix is electrolysed, the overall reduction reaction isCOMEDK 2015 Medium
- The molar conductivity of the complex \(\mathrm{CoCl}_3 \cdot 4 \mathrm{NH}_3 \cdot 2 \mathrm{H}_2 \mathrm{O}\) is found to be the same as that of a \(1: 3\) electrolyte. The structural formula of the compound is :COMEDK 2024 Medium
More PYQs from COMEDK
- For a cell reaction,
\(A(s)+B^{2+}(a q) \longrightarrow A^{2+}(a q)+B(s)\); the
standard emf of the cell is \(0.295 \mathrm{~V}\) at \(25^{\circ} \mathrm{C}\). The equilibrium constant at \(25^{\circ} \mathrm{C}\) will beCOMEDK 2023 Medium - If the tangent to the curve \(x y+a x+b y=0\) at \((1,1)\) is inclined at an angle \(\tan ^{-1} 2\) with \(X\)-axis, thenCOMEDK 2022 Medium
- From the following compounds, identify the one which is most acidic.
COMEDK 2024 Medium - In Young's double slit experiment, the ratio of maximum and minimum intensities in the fringe system is \(9: 1\). The ratio of amplitudes of coherent sources isCOMEDK 2023 Medium
- Radium having mass number 200 and binding energy per nucleon 5.6 MeV , splits into two fragments Cadmium of mass number 112 and Hassium of mass number 108. If the binding energy per nucleon for Cadmium and Hassium is approximately 8.0 MeV , then the energy Q released per fission will be:COMEDK 2025 Medium
- \(0.5737373 \ldots\) is equal toCOMEDK 2013 Medium