NIOS Class 12 Chemistry Important Paper – Paper 3

NIOS Class 12 Chemistry Important Paper – Paper 3

 

Q: What is a solution?

Answer: A mixture of two or more substances is called a solution.

Q: What is the normal boiling point?

Answer: The normal boiling point (B.P.) is the temperature at which the vapor pressure of a liquid becomes equal to one atmosphere (1 atm) or 760 Torr.

Q: What is an ideal solution?

Answer: An ideal solution is one that obeys Raoult’s Law. Such a solution is termed an ideal solution.

Q: Explain Molarity.

Answer: Molarity: The number of moles of solute dissolved in one liter of a solution is called the molarity of the solution.

Q: Explain Molality.

Answer: The number of moles of solute dissolved per kilogram of solvent is called the molality of the solution.

Q: Define Normality.

Answer: The number of gram-equivalents of solute dissolved per liter of a solutionis called the normality of the solution.

Q: State Raoult’s Law for solutions of volatile liquids.

Answer: In a solution of volatile liquids, the vapor pressure of each liquid component is directly proportional to its mole fraction.

Q: Give an example of a solution in which both the solute and the solvent are in the solid state.

Answer: (Brass)

 

NIOS Class 12 Chemistry Important Questions 2026 | Board Exam तैयारी के लिए सबसे जरूरी प्रश्न

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