JEE Mains · Chemistry · STD 12 -1. Solution and colligative properties
Liquids \(A\) and \(B\) form and ideal solution in the entire composition range. At \(350\, K\), the vapour pressures of pure \(A\) and pure \(B\) are \(7 \times 10^3\, Pa\) and \(12 \times 10^3\, Pa\), respectively. The composition of the vapour in equilibrium with a solution containing \(40\, mole\) percent of \(A\) at this temperature is
- A \(x_A = 0.37\) ; \(x_B = 0.63\)
- B \(x_A = 0.28\) ; \(x_B = 0.72\)
- C \(x_A = 0.40\) ; \(x_B = 0.6\)
- D \(x_A = 0.76\) ; \(x_B = 0.24\)
Answer & Solution
Correct Answer
(B) \(x_A = 0.28\) ; \(x_B = 0.72\)
Step-by-step Solution
Detailed explanation
\({P_A}\, = \,{\chi _A}P_A^o\, = \,{Y_A}{P_T}\) \({P_T}\, = {\chi _A}P_A^o + {\chi _B}P_B^o\, = 0.4\, \times \,7\, \times \,{10^3}\, + \,0.6\, \times \,12\, \times \,{10^3}\, = \,{10^4}\) \(0.4\, \times \,7\, \times \,{10^3}\, = \,{Y_A}\, \times \,{10^4}\) \({Y_A}\, = \,0.28\)…
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
- Which of the following statement is correct for paper chromatography ?JEE Mains 2023 Hard
- A first order reaction has the rate constant, \(k =4.6\) \(\times 10^{-3} s ^{-1}\). The number of correct statement/s from the following is/are Given : \(\log 3=0.48\) \(A.\) Reaction completes in \(1000\,s\). \(B.\) The reaction has a half-life of \(500\, s\). \(C.\) The time required for \(10\, \%\) completion is 25 times the time required for \(90 \,\%\) completion. \(D.\) The degree of dissociation is equal to \(\left(1-e^{-k t}\right)\). \(E.\) The rate and the rate constant have the same unit.JEE Mains 2023 Hard
- Which among the following molecules is (a) involved in \(\mathrm{sp}^3 \mathrm{~d}\) hybridization, (b) has different bond lengths and (c) has lone pair of electrons on the central atom?JEE Mains 2025 Easy
- The number of orbitals with \(n =5, m _{l}=+2\) is ...... . (Round off to the Nearest Integer)JEE Mains 2021 Medium
- Lanthanoid ions with \(4 f^7\) configuration are :
(A) \(\mathrm{Eu}^{2+}\)
(B) \(\mathrm{Gd}^{3+}\)
(C) \(\mathrm{Eu}^{3+}\)
(D) \(\mathrm{Tb}^{3+}\)
(E) \(\mathrm{Sm}^{2+}\)
Choose the correct answer from the options given below :JEE Mains 2025 Hard - The \(pH\) at which \(\mathrm{Mg}(\mathrm{OH})_2\left[\mathrm{~K}_{\mathrm{sp}}=1 \times 10^{-11}\right]\) begins to precipitate from a solution containing \(0.10 \ \mathrm{M}\) \(\mathrm{Mg}^{2+}\) ions is _______.JEE Mains 2024 Hard
More PYQs from JEE Mains
- Which of the following molecules(s) show/s paramagnetic behavior?
(A) \(\mathrm{O}_2\)
(B) \(\mathrm{N}_2\)
(C) \(\mathrm{F}_2\)
(D) \(\mathrm{S}_2\)
(E) \(\mathrm{Cl}_2\)
Choose the correct answer from the options given below :JEE Mains 2025 Medium - Let \(\mathrm{y}=\mathrm{y}(\mathrm{x})\) be the solution of the differential equation \(\left((x+2) e^{\left(\frac{y+1}{x+2}\right)}+(y+1)\right) d x=(x+2) d y, y(1)=1\) If the domain of \(y=y(x)\) is an open interval \((\alpha, \beta)\), then \(|\alpha+\beta|\) is equal to \(......\)JEE Mains 2021 Hard
- The eccentricity of an ellipse \(E\) with centre at the origin \(O\) is \(\dfrac{\sqrt{3}}{2}\) and its directrices are \(x = \pm \dfrac{4\sqrt{6}}{3}\). Let \(H: \dfrac{x^2}{a^2} - \dfrac{y^2}{b^2} = 1\) be a hyperbola whose eccentricity is equal to the length of semi-major axis of \(E\), and whose length of latus rectum is equal to the length of minor axis of \(E\). Then the distance between the foci of \(H\) is :JEE Mains 2026 Hard
- If the first term of an \(A.P.\) is \(3\) and the sum of its first \(25\) terms is equal to the sum of its next \(15\) terms, then the common difference of this \(A.P.\) is :JEE Mains 2020 Hard
- Let he sum of the coefficient of first three terms in the expansion of \(\left(x-\frac{3}{x^2}\right)^n ; x\ne 0, n \in N\) be 376 . Then, the coefficient of \(x^4\) is equal to:JEE Mains 2023 Medium
- Let \(\mathrm{f}: \mathrm{R} \rightarrow \mathrm{R}\) be a function defined \(f(x)=\frac{x}{\left(1+x^4\right)^{1 / 4}}\) and \(g(x)=f(f(f(f(x))))\) then \(18 \int_0^{\sqrt{2 \sqrt{5}}} x^2 g(x) d x\)JEE Mains 2024 Hard