Chemistry – Important Question Bank for (PSEB) Punjab HSC 2016 Examination

1. K₂PtCl₆ is a well known compound where a corresponding Ni Compound is not known? Why are the ionisation energies of 5d transition elements greater than those of 3d & 4d elements.

2. Give IUPAC Name of K₃ [ C_o (C₂O4)₃]. Why [Cr(NH₃)₆] ³ + is paramagnetic while [Ni(CN)₄] ² – is diamagnetic?  Explain.

3. Why do d & f block elements show variable oxidation state? Why do they show magnetic behaviour? Explain it with the example of Mn(25) and Cu(29)

4. What is Lanthanoid contraction? Give consequences of Lanthanoid contraction with suitable example.

5. Explain Mutarotation with example. How will you differentiate between reducing & Non reducing sugars?

6. Explain dehydrogenation of primary & secondary alcohols

7. Differentiate between oil & fats. Give their uses .

8. Explain addition polymerization and condensation polymerization with suitable.

9. example.

(a) How will you prepare aniline from Nitrobenzene

(b) why do amines dissolve in mineral acids

10. Differentiate between Nucleosides & Nucleotides.

11. Why aliphatic amines are stronger bases than aromatic amines? why do primary amines have higher boiling point than tertiary amines?

12. Describe the following with one example in each case

1. Tranquillizers
2. Anti fertility drugs

13. Describe the following terms

(i) Gene

(ii) Genetic code

(iii) Codon

14. Describe Aldol condensation. Aldehydes are more reactive than ketones. why?

15. Give reason for the higher boiling point of ethanol in comparison to methoxy methane.

16. Explain with reaction oxidation of primary & secondary alcohols.

17. Compare the acidic strength of phenol & carboxylic acid.

18. Benzaldehyde is less reactive than acetaldehyde towards nucleophilic addition reaction. Why?

19. How will you distinguish between phenol & Ethanol.

20. Why is carbon nitrogen bond length in aromatic amines shorter than in aliphatic amines?

21. Discuss between formic acid & Acetic acid

22. What are disaccharides? Give an example & write chemical formulas

23. Give preparation and one use of Teflon.

24. Explain Saponification with example

25. Define isoelectric point of L-amino acids.

26. Convert Benzene to Benzoic acid.

27. Name the disease caused by deficiency of Vitamin B₁.

28. Define Harmonies with example.

29.Define Molarity.

30. Define Molality

31. What is Doping?

32. What are Ferromagnetic Substances?

33. What is Inert pair effect?

34. Complete the following reaction

35. C₆H₆ + RCOCl[ anhydrous]

[    AlCl₃       ]

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