Chapter 2: Solutions

Focusing on Chapter 2: Solutions from the Class 12 CBSE NCERT Chemistry textbook, here are some of the most frequently asked questions:

1. Differentiating Molarity and Molality: Explain the difference between molarity and molality of a solution.

2. Calculating Mass Percentage: Calculate the mass percentage of benzene (C₆H₆) and carbon tetrachloride (CCl₄) if 22 g of benzene is dissolved in 122 g of carbon tetrachloride.

3. Understanding Azeotropes: What are azeotropes? Provide an example.

4. Effect of Non-Volatile Solute on Vapour Pressure: How is the vapour pressure of a solvent affected when a non-volatile solute is dissolved in it?

5. Calculating Mole Fraction: Calculate the mole fraction of water in a solution containing an equal number of moles of water and ethanol (C₂H₅OH).

6. Understanding Reverse Osmosis: What is meant by 'reverse osmosis'?

7. Henry's Law Application: What concentration of nitrogen should be present in a glass of water at room temperature? Assume a temperature of 25°C, a total pressure of 1 atmosphere, and a mole fraction of nitrogen in air of 0.78. [Given: Henry's law constant (K_H) for nitrogen = 8.42 × 10⁻⁷ M/mm Hg]

8. Positive Deviations from Raoult's Law: What is meant by positive deviations from Raoult's law? Give an example. What is the sign of Δ_mixH for positive deviation?

9. Osmotic Pressure Definition: Define osmotic pressure of a solution. How is the osmotic pressure related to the concentration of a solute in a solution?

10. Colligative Properties Explanation: What are colligative properties? How do they depend on the number of solute particles in a solution?

These questions cover key concepts from the chapter and are often emphasized in exams. For detailed solutions and additional practice, you may refer to the provided links.