Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Most Important Selected Qs for JEE AdvancedChemistrySolutions

The vapour pressure of a solution of 5 g of non-electrolyte in 100 g of water at particular temperature 2985 Nm ⁻² . The vapour pressure of pure water at that temperature is 3000 Nm ⁻² . The molecular weight the solute is

Options

  1. A180
  2. B90
  3. C270
  4. D200

Correct answer

A. 180

Step-by-step solution

aligned & W₂=5 ~g , ~W ₁=100 ~g & P ₃=2985 Nm ⁻² & P ^0=3000 Nm ⁻² & M ₂=? & P ^0-P_s P^0 = W₂ M₂ M₁ W₁ & M₂= W₂ M₁ P^0-P_s P^0 W₁ = 5 18 ( 3000-2985 3000 ) 100 & M₂=180 aligned

Practice Solutions on Quantrex Academy →

More from Solutions

In a solvent S , a compound B is partially dissociated into C and D as given below: B 2 C + 2 D B , C and D are non-volatile in nature. The molar mass of B is 10 times the molar ma 2026Passage: Two volatile liquids A and B form an ideal solution. Consider a 5 molal solution of B in A inside a closed container having a total vapour pressure of 100 mm Hg at 300 K. 2026Passage: Two volatile liquids A and B form an ideal solution. Consider a 5 molal solution of B in A inside a closed container having a total vapour pressure of 100 mm Hg at 300 K. 2026Given below are two statements: Given: Molar mass of C, H, O, Cl are 12, 1, 16 and 35.5 g mol ⁻¹ , respectively. Statement I: In 30 % (w/w) solution of methanol in CCl ₄ (at T K), 2026Which of the following statements are not correct? A. For water, magnitude of K_b is more than the magnitude of K_f . B. The elevation in boiling point of water when a non-volatile 2026Given below are two statements : Statement I : H₂ O molecules move from the chamber 1 to chamber 2 . Statement II : The osmotic pressure of a solution prepared by dissolving 50 mg 2026When 0.25 moles of a non-volatile, non-ionizable solute was dissolved in 1 mole of a solvent the vapor pressure of solution was x % of vapor pressure of pure solvent. What is x % ? 202620 g hemoglobin in a 1 L aqueous solution (A) at 300 K is separated from pure water by semi permeable membrane. At equilibrium the height of solution in a tube dipped in a solution 2026 Full Solutions list All Most Important Selected Qs for JEE Advanced PYQs