Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Chemical and Phase Equilibria question

2023 · Q18
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /IIT JAM
  3. /Chemistry
  4. /Chemical and Phase Equilibria
  5. /2023 · Q18

Chemical and Phase Equilibria question

2023 · Q18

IIT JAMChemistryChemical and Phase EquilibriaMCQ+2 / −0.67
The vapor pressure of a dilute solution of a non-volatile solute and the vapor pressure of the pure solvent at the same temperature are PPP and P∗P^*P∗, respectively. P∗−PP∗ is equal to\frac{P^* - P}{P^*} \text{ is equal to}P∗P∗−P​ is equal to (Assume that the vapor phase behaves as an ideal gas)
  1. A
    molality of the solution
  2. B
    mole fraction of the solvent
  3. C
    weight fraction of the solute
  4. D
    mole fraction of the solute
View written solutionFree

Correct answer: D

PreviousNext

More from Chemical and Phase Equilibria

  • The volume of water (in mL) required to be added to a 100 mL solution (aq. 0.1 M) of a weak acid (HA) at 25 °C to double its degree of dissociation is [Given: Ka​ of HA at 25 °C = 1.8×10−5]2023 · MCQ
  • The following diagram is obtained in a pH-metric titration of a weak dibasic acid (H₂A) with a strong base. The point that best represents [HA⁻] = [A⁻²] is Includes diagram2023 · MCQ
  • The standard Gibbs free energy change for the reaction H_{2}O (g) → H_{2} (g) + ½ O_{2} (g) at 2500 K is +118 kJ mol^{-1}. The equilibrium constant for the reaction is [Given: R = 8.314 J K^{-1} mol^{-1}]2022 · MCQ
  • The pH of an aqueous buffer prepared using CH_{3}COOH and CH_{3}COO^{-}Na^{+} is 4.80. The quantity [CH3​COOH][CH3​COO−]−[CH3​COOH]​ is ​. *(round off to…2022 · Numerical
  • At constant temperature, 6.40 g of a substance dissolved in 78 g of benzene decreases the vapor pressure of benzene from 0.125 atm to 0.119 atm. The molar mass of the substance is ​ g mol^{-1}. *(round off to one…2022 · Numerical
  • A buffer solution is prepared by mixing 0.3 M NH₃ and 0.1 M NH₄NO₃. If K_b of NH₃ is 1.6 × 10⁻⁵ at 25 °C, then the pH (rounded off to one decimal place) of the buffer solution at 25 °C is ​.2021 · Numerical
  • A dilute solution prepared by dissolving a nonvolatile solute in one liter water shows a depression in freezing point of 0.186 K. This solute neither dissociates nor associates in water. The boiling point of the solution in K (rounded off…2021 · Numerical
  • A pure substance **M** has lesser density in solid state than in liquid state. The ΔSfusion​ of **M** is +25 J K−1 mol−1. The CORRECT representative Pressure-Temperature diagram for the fusion of…2021 · MCQ