Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET2012ChemistrySolutions

The weight in grams of a non-volatile solute (mol. wt. 60) to be dissolved in 90 ~g of water to produce a relative lowering of vapour pressure of 0.02 is

Options

  1. A4
  2. B8
  3. C6
  4. D10

Correct answer

C. 6

Step-by-step solution

Relative lowering of vapour pressure, aligned p^ -p_s p^ & =x_A & = w_A m_A w_A m_A + w_B m_B aligned (where, w_A and m_A are the mass and molar mass of solute and w_B and m_B are the mass and molar mass of water.) aligned 0.02 & = x 60 x 60 + 90 18 0.02 & = x 60 x 60 +5 1 0.02 & = x 60 +5 x 60 50 & =1+ 5 60 x 49 & = 300 x x & = 300 49 =6 ~g aligned

Practice Solutions on Quantrex Academy →

More from Solutions

Identify the law which is stated as "For any solutions, the partial vapour pressure of each volatile component in the solution is directly proportional to its mole fraction". 2026The system that forms maximum boiling azeotrope is: 2026When 1 mole of benzene is mixed with 1 mole of toluene, the vapours will contain 2026A 5% solution (by mass) of cane sugar in water has a freezing point of 271 K. The freezing point of a 5% solution (by mass) of glucose in water is: [freezing point of pure water: 2 20260.02M solution of sucrose is isotonic with 0.008M solution of sodium sulphate. What is the percentage dissociation of the electrolyte? 2026What is the percentage dissociation of 0.8ml of Acetic acid (density is 1.04g/ml) which is dissolved in 1.2L of water if the observed Depression in freezing point is 0.0228 K? ( K_ 2026Identify the correct statement 2026An aqueous solution of an unknown solute "X" is prepared by adding 4.0g of it into 2.0moles of water. What is the mass percent of "X" in the aqueous solution? 2026 Full Solutions list All AP EAMCET PYQs