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The most important Chemistry chapter 6 short questions for Class 11. The 1st-year chapter 6 of Chemistry is related to chemical bonding. These questions are for the Punjab TextBook Board and can be used within all of Punjab where this syllabus is taught.

Students are advised to prepare these questions in order to perform the best in the board examination.

Chemistry Chapter 6 Short Questions for Class 11

1. Differentiate between exothermic and endothermic reactions.
2. What do you mean by “enthalpy of a system”?
3. Differentiate clearly between entropy (S) and Gibbs free energy (G).
4. Distinguish clearly between standard enthalpy of reaction and standard enthalpy of formation.
5. Define the following enthalpies and give one example of each.
   (i) standard enthalpy of solution (ii) standard enthalpy of hydration (iii) standard enthalpy of atomization (iv) standard enthalpy of combustion
6. Explain why the lattice enthalpy of an ionic compund is typically a large negative value.
7. What factors influence the magnitude of the lattice enthalpy?
8. Explain why the enthalpy of hydration is always an exothermic process for gaseous ions. What are the main interactions responsible for the release of energy during hydration?
9. For the reaction CH₄ + 2O₂ → CO₂ + 2H₂O, identify all the bonds that need to be broken all the bonds that need to be formed to carry out a bond energy calculation of ΔH.
10. For a reaction to be spontaneous, what is the required sign of the Gibbs free energy change (ΔG)? Under what conditions of enthalpy change ($\mathrm{\Delta }H$) and entropy change ($\mathrm{\Delta }S$) will a reaction always be spontaneous?
11. The enthalpy of solution can be either positive or negative. Explain what a positive $\mathrm{\Delta }{H}_{sol}$ and a negative $\mathrm{\Delta }{H}_{sol}$​ indicate about the energy changes during the dissolution process.
12. Consider two ions with similar charges but different sizes, or similar sizes but different charges. Explain how the concept of charge density can be used to predict which ion will have a more exothermic enthalpy of hydration and why.
13. Define electron affinity. Give example.
14. What is calorie content?
15. What is meant by lattice energy? Give example.
16. What do you know about entropy?
17. The sign of change in free energy (ΔG) of a process can be used to predict the spontaneity of that process. How?
18. Differentiate between endothermic and exothermic reactions.
19. Define
    (i) standard enthalpy of reaction with one example (ii) enthalpy of a system with one example
20. Define enthalpy of formation (ΔH_f^o). Give two examples.
21. State, with one example, enthalpy of combustion.
22. Define enthalpy of neutralization. Why is enthalpy of neutralization of strong acid and strong baseis always -57.5kJ mol^-1?
23. Define Hess’s law of constant heat summation.
24. Differentiate between atomization energy and lattice energy.
25. Define heat capacity of a body. Give its mathematical expressions.

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