NEET Chemistry: Solutions — MCQ Test 18

Q6. A solution of a gas in water has a mole fraction of 0.03 at a partial pressure of 4.5 bar. If the temperature increases and the Henry’s law constant becomes 200 bar, what is the new partial pressure?

Q7. The solubility of a gas in water follows Henry’s law with a constant of 150 bar. If the gas’s partial pressure decreases from 6 bar to 3 bar, by what factor does its solubility decrease?

Q8. The osmotic pressure of a solution containing 5 g of a solute in 1 L of solution at 27°C is 2.46 atm. What is the molar mass of the solute? (\( R = 0.0821 \, \text{L atm mol}^{-1} \text{K}^{-1} \))

Q9. A 0.15 M solution of a solute in 500 mL of water has an osmotic pressure of 1.476 atm at 27°C. If the solute dissociates into 2 ions, what is the degree of dissociation? (\( R = 0.0821 \, \text{L atm mol}^{-1} \text{K}^{-1} \))

Q10. A solution of two volatile liquids has vapor pressures of 200 mm Hg and 300 mm Hg for pure components. If the total vapor pressure is 240 mm Hg, what is the mole fraction of the second component in the vapor phase?

NEET Chemistry — Solutions

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A 0.6 M solution of NaCl (molar mass = 58.5 g/mol) has a density of 1.05 g/mL. What is the molality of the solution if 200 mL is prepared?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Chemistry preparation, focusing specifically on the chapter Solutions. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Solution, Molality, Prepared, Volatile, Pressure, and Fraction.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. A 0.6 M solution of NaCl (molar mass = 58.5 g/mol) has a density of 1.05 g/mL. What is the molality of the solution if 200 mL is prepared?

  • A. 0.58 mol/kg
  • B. 0.591 mol/kg
  • C. 0.6 mol/kg
  • D. 0.62 mol/kg

Q2. A non-volatile solute lowers the vapor pressure of water from 20 mm Hg to 19.8 mm Hg. What is the mole fraction of the solute?

  • A. 0.005
  • B. 0.02
  • C. 0.01
  • D. 0.1

Q3. A gas has a Henry’s law constant of 300 bar at 25°C. If 0.01 mole of the gas is dissolved in 500 g of water at 6 bar, what is the molality of the solution?

  • A. 0.015 mol/kg
  • B. 0.018 mol/kg
  • C. 0.02 mol/kg
  • D. 0.025 mol/kg

Q4. A solution of a non-volatile solute in water boils at 100.52°C at 1 atm. What is the molality of the solution? (\( K_b = 0.52 \, \text{K kg mol}^{-1} \))

  • A. 0.5 mol/kg
  • B. 0.75 mol/kg
  • C. 1.0 mol/kg
  • D. 1.5 mol/kg

Q5. A gas has a Henry’s law constant of 50 bar. If its mole fraction in a solution is 0.04, what is its partial pressure above the solution?

  • A. 2 bar
  • B. 1 bar
  • C. 4 bar
  • D. 0.8 bar

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