NEET Chemistry: Solutions — Practice Set 14

Q1. What is the osmotic pressure of a 0.015 M solution of a non-electrolyte at 27°C? (\( R = 0.0821 \, \text{L atm mol}^{-1} \text{K}^{-1} \))

Q2. What is the mole fraction of a solute if the vapor pressure of a solution is 22 mm Hg and that of pure solvent is 25 mm Hg?

Q3. What is the mass of water required to prepare 300 g of a 5% by mass solution of a solute?

Q4. A 0.2 M solution of Na₂CO₃ (assuming complete dissociation) has an osmotic pressure of 1.968 atm at a certain temperature. What is the temperature? (\( R = 0.0821 \, \text{L atm mol}^{-1} \text{K}^{-1} \))

Q5. A solution contains 30 g of a solute in 120 g of water. If the mass percentage of the solute is increased to 25% by evaporating water, what mass of water remains?

Q6. A solution contains 6 g of a solute (molar mass = 120 g/mol) in 300 mL of solution. What is the molarity?

Q7. What is the volume of water required to prepare 200 mL of a 0.5 M solution using 4 g of NaOH (molar mass = 40 g/mol)?

Q8. What is the mass of urea (molar mass = 60 g/mol) required to prepare 2 kg of a 0.5 molal aqueous solution?

Q9. A gas has a Henry’s law constant of 400 bar. If its partial pressure is 8 bar, what is the mole fraction in the solution?

Q10. A gas has a Henry’s law constant of 120 bar. If its mole fraction in a solution is 0.025, what is its partial pressure?

Chemistry — Solutions

Set 14 of 20

15:00

Sign in to save your score and view detailed explanations

Sign In Free
1Question 1 of 10
Medium

What is the osmotic pressure of a 0.015 M solution of a non-electrolyte at 27°C? (\( R = 0.0821 \, \text{L atm mol}^{-1} \text{K}^{-1} \))