CBSE Class 11 Chemistry Sample Paper Set 17

1. Round up the following upto three significant figures: 

    a) 34.216         b) 10.4107            c) 0.04597            d) 2808

2. What is the difference between vapour and gas? 

3. The size of isoelectronic species: F^-, Ne and Na⁺ are affected by ___________. 

4. Which of the following statements is incorrect in relation to I.E? 

    a) I.E increases for each successive electron.

    b) The greatest increase in I.E is experienced on removal of electrons from core noble gas configuration.

    c) End of valence electron is marked by a big jump in I.E.

    d) Removal of electron from orbitals bearing lower ‘n’ value is easier than from orbital having higher ‘n’ value.

5. Gases have characteristic critical temperature which depends on the magnitude of intermolecular forces between the gas particles. Critical temperatures of ammonia and carbon dioxide are 405.5 K and 304.10 K respectively. Which of these gases will liquefy first when you start cooling from 500 K to their critical temperature? 

6. Explain why sodium chloride pieces are harder than sodium metal. 

7. State Charle’s law. 

8. For an isolated system ΔU = 0, what will be ΔS? 

9. Write the structures of two homocyclic and two heterocyclic compounds 

10. Define absolute zero. Can this temperature be attained in actual practice? Give reasons

11. What are silicones?

12. What is quick lime? What happens when we add water to it? 

13. Arrange the following elements in order of increasing bond strengths – Cl₂, F₂, N₂, O₂ 

14. Explain homologous series.

15. Which has largest no. of atoms – a) 1g Au _(s) b) 1g Na (s) c) 1g Li(s)  d) 1g Cl_{2 (s)}  

16. Discuss the role of catalyst in the electrophilic reaction in benzene 

Please refer to attached file for CBSE Class 11 Chemistry Sample Paper Set 17