Here are Important Long question for class 11 chemistry. The questions mark with * are the guess questions of 2025 exams. Please learn them at 1st preference. Short questions will be added soon, hopefully in one day.

Important Long questions.

Chapter 1

Chapter 3

1. What is ideal gas constant R, write down its units.
2. Write down applications of Dalton’s law of partial pressure. *
3. Write down the postulates of kinetic molecular theory.
4. Derive different gas laws from Kinetic theory of gasses. *
5. What is Joule Thomson effect. write down the method of liquefaction of the gas. *
6. Write down the Van der Waals equation for real gases. *
7. What is plasma write down its applications. *

Chapter 4

1. What are London forces. Write down factors affecting them.
2. Define vapor pressure of liquid. Also explained manometric method for its determination. *
3. Define the boiling point. Explain the variations of boiling point with external pressure.
4. What are liquid crystals? Give their applications. *
5. Explain crystal systems with angles and edges. *
6. Explain the structure of sodium chloride. Justify that the unit cell of sodium chloride has four formula units in it. *
7. Properties of covalent solids.
8. Water molecular crystals give their properties justify that molecular crystal are softer than ionic crystal.
9. Write down the any four properties of crystalline solid. *

Chapter 5

1. What is J.J Thomson’s experiment for determining e/m value of electron? *
2. Explain Millikan’s oil drop experiment to determine the charge on electron. *
3. Write down postulates of Bohol’s model of atom.
4. Derive the equation to calculate the radius of revolving electron in nth orbit.
5. What is spectrum? Explain atomic emission and atomic absorption spectrum. *
6. Discussed the defects of Bohr’s model of atom. *
7. Write down the quantum numbers in detail. (will be asked one or two) *

Chapter 6

1. Define ionization energy, how it changes in the periodic table. What factors are responsible for variations. *
2. Explained electron affinity, describe the factors influencing it also give its trends in periodic table.
3. Write down the postulates of valence shell electron pair repulsion (VSEPR) theory. explained with the help of different examples. (Sometimes specific examples are asked) *
4. Define and explain hybridization with its types. (Only one type or specific examples are given to explain) **
5. Draw label and explain the structure of oxygen/nitrogen on the basis of Molecular orbital theory. *
6. Draw and explain coordinate covalent bond with different examples.

Chapter 7

1. State first law of thermodynamics. And prove the following equations.

∆E = q_v and ∆H = q_p *

• Differentiate between spontaneous and non-spontaneous reactions with different examples. *
• State Hess’s law of constant heat summation. write its mathematical form.
• Explain how enthalpy of reaction is determined by glass calorimeter also draw the diagram.
• How the enthalpy of combustion is measured by bomb calorimeter also draw the diagram. *
• State the Hess’s law of constant heat summation. Calculate the lattice energy of sodium chloride by Born-Haber cycle. *

Chapter 8

1. All examples. (1-7) *
2. Exercise Question No. 19-25 (24*, 25*)

Chapter 9

1. Differentiate between ideal and non-ideal solutions. *
2. Explain water phenol system.
3. What is Raoult’s law. Give the three statements with their expressions. Also write its importance. **
4. Define elevation of boiling point and describe Landsberger’s method for the measurement of boiling point elevation. *
5. Describe Beckmann’s freezing point method for measurement of depression of freezing point (∆T_f).*
6. State solubility curves and explain continuous and discontinuous solubility curves with examples.

Chapter 10

1. Describe the construction and working of Galvanic cell.
2. Explain four industrial applications of Electrolysis. *
3. Describe the construction and working of standard hydrogen electrode (SHE). *
4. Define electrochemical series explain its applications. (A few applications can be asked) **
5. Write comprehensive note on lead accumulator with its discharging and recharging process.
6. Describe the construction and working of fuel cell give few examples. *

Chapter 11

1. Define order of reaction and explain it with the help of examples. *
2. Discuss physical methods to determine rate of reaction.
3. Write a brief note on energy of activation by using collision theory.
4. Write down the factors affecting the rate of reaction.
5. Derive Arrhenius equation to calculate energy of activation of a reaction. *
6. How Order of reaction can be measured by half-life method. *
7. Define catalysis. Explain its types with a suitable example. *
8. Define enzyme mention characteristics of enzyme catalysis.