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important long questions of chemistry 2nd year chapter wise

Important long questions of Chemistry 2nd year


Important Long questions Ch 1To Ch 16

  1. What is orbital hybridization? Explain SP-hybridization of carbon.
  2. Explain any four features of organic compounds.
  3. How will you distinguish Ethane, Ethene, and Ethyne?
  4. Describe the acidic behavior of phenol. How does phenol react with alkali to give salt?
  5. Explain the following properties for transition elements (i) Paramagnetism (ii) Colour
  6. Write a note on Cannizzaro’s reaction.
  7. How will you distinguish between primary, secondary, and tertiary alcohol, explain with reactions?
  8. How bleaching powder is prepared by Hasenclever’s method? Give its reaction with HCl and NH3.
  9. Explain the following properties with reference o phenol. (i) Esterification (ii) Sulphonation
  10. Write down the mechanisms of reaction of acetic acid with thionyl chloride and Ammonia?
  11. Explain with equation how alkenes can be prepared from i. Acids ii. Grignard’s reagents
  12. Discuss the oxides of chlorine.
  13. Describe Birkeland and Eyde’s process for the manufacture of Nitric acid.
  14. How does Acetaldehyde react with the following reagents? i) HCl ii) DHI iii) NaOH iv)NaHSO3   NaBH4/H2O
  15. Write reaction equation for reaction of ethanol with: (i) NH2-OH (ii) NH2-NH2 (iii) H2N – NH C6H5 (iv) 2 , 4 – DNPH  
  16. Define isomerism. Explain geometrical isomerism with an example.
  17. Explain Beckmann’s method for preparation of Bleaching Powder?
  18.  How does ethyl alcohol react with the following reagents: i) Conc. H2 SO4 ii) Na iii) CH3 COOH iv)SOCl2
  19. Explain the periodic trends in the following properties. i) Atomic radius ii) Electron affinity
  20. How sulphuric acid is manufactured by contact process on an industrial scale?
  21. Prepare Glyoxal, Acrylonitrile, Ethane, and Ethanal from Acetylene.
  22. Write the mechanism of Nitration and Alkylation of Benzene.
  23. How is nitric acid prepared Industrially? Give all equations involved?
  24.  What is fermentation? How ethyl alcohol can be prepared by this method from molasses?
  25. Convert acetic acid into i) Methane ii) Acetyl chloride
  26. Give two reactions in each case in which the C-O and O-H bond of alcohol is broken.
  27. Draw a structural formula for the following compounds: (i) n – chlorobenzene acid (ii) 2, 4 , 6 – Trinitrotoluene (iii) P –Dibenzylbenzene (iv) p – Nitro aniline 
  28. Write laboratory and industrial preparation of acetaldehyde.
  29. Write down two methods for preparing phenol. How phenol reacts with: a) Zn b) Br2 water
  30. Write two similarities and two dissimilarities of hydrogen with IV-A group elements.
  31. How will you make the following conversions? (a) n-propyl bromide into propane (b) Ethane into methane (c)Propanoic acid into ethane (d) 2-Butyne into cis-2-Butene
  32. What are haloform reactions? How iodoform test is useful?
  33. Using ethyne as a starting material how would you get acetaldehyde, acetone, and ethyl alcohol?
  34. Explain the type of bonds and shapes of the following molecules using the hybridization approach.CH3 − CH3, CH2 = CH2, CH ≡ CH, HCHO, CH3Cl
  35. Describe the trend of metallic character in groups and periods and discuss the impact of atomic size on it?
  36. Discuss the electrochemical theory for corrosion?  
  37. Write chemical reactions of H3BO3?
  38. What is nitration of benzene? Give the mechanism of the reaction.
  39.  Define Nucleophilic substitution reaction and discuss the salient features of SN1 reactions. 
  40.     How is phenol prepared from i) Chlorobenzene      ii) Sodium salt of benzene sulphonic acid
  41.  What is an organic compound? Explain the importance of Wohler’s work in the write a short note on the cracking of hydrocarbons.
  42. Predict the major products of bromination of the following compounds along with reaction conditions. i)  Nitrobenzene ii) Benzaldehyde iii) Bromobenzene iv) Phenol    
  43.   Discuss briefly the two possible mechanisms of β-elimination reactions. 
  44. Define hybridization of orbitals. Explain the structure of methane with sp3 hybridization.
  45.  Write the chemical reaction of phenol with the following: i) NaOH ii) Zn iii) CH3COCl iv) H2
  46. Discuss the system of nomenclature used for oxyacid of halogens. Support your answer with exercise.

Important short questions of Chemistry 2nd Year



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