2nd Year NotesChemistry class 12th

2nd Year Chemistry Important Questions

2nd Year Chemistry Important Questions On Newsongoogle By Bilal Articles

Chapter # 12

  1. Describe one method each for the preparation of ethane and ethyne. How would you establish that benzene is a polymer of acetylene?
  2. Or
  3. Starting from ethane, outline the reactions for preparation of the following compounds
  1. Ethylene dibromoethane
  2. Ethyne
  3. Ethane
  4. Ethylene glycol
  5. Formaldehyde

Chapter # 13

  1. Write three methods of preparation of benzene
  2. Describe the structure of benzene on the basis of resonance methods
  3. Explain the structure of benzene in the light of atomic orbital treatment

Chapter # 14

  1. Define the following with example:
  1. Coordination number
  2. Coordination sphere
  3. Ligands
  4. Chelates

Chapter # 15

  1. What are SN reactions? Differentiate between SN1 and SN2 reactions Or
  2. Write a note on SN2 reaction

Chapter # 16

  1. Convert the following:
  2. Propyne into acetone
  3. Ethyne into oxalic acid
  4. Acetic acid into methane
  5. 1-propanoline 1-chloro
  6. 2-propanol
  7. Propene into 2-bromopropane
  8. Ethane into ethyne

Chapter # 17

  1. Explain reforming of petroleum with the help of suitable example

Chapter # 18

  1. Define Friedel Crafts reactions. Give mechanism with an example of Friedel-Craft’s acylation reaction
  2. Describe the Friedel-Crafts acylation of benzene with mechanism
  3. Write a note on Friedel-Craft’s reaction

Chapter # 19

  1. How steel can be manufactured by Bessemer’s process?
  2. Explain Bessemer’s process?
  3. What is the difference between wrought iron and steel?
  4. Explain Bessemer’s process for preparation of steel
  5. Explain open hearth process for the manufacture of steel

Chapter # 20

  1. Discuss acid rain. How does it affect our environment?

Chapter # 21

  1. Write down the mechanism of the reaction between acetic and ethanol Or
  2. Write down the mechanism of conversion of acetic acid to
  1. Acetyl chloride
  2. Acetamide

Chapter # 22

  1. What do you mean by Smog? Discuss its types and give conditions for formation of smog Or
  2. What is smog? Give condition for the formation of a smog

Chapter # 23

  1. Discuss various periods in the modern periodic table
  2. Discuss the position of hydrogen in group IV-A of periodic table
  3. Justify position of hydrogen at the top of group IA and VIIA in the periodic table

Chapter # 24

  1. What products are formed when the following compounds are treated with ethyl magnesium bromide, followed by hydrolysis in the presence of an acid?
  1. HCHO
  2. CH3CHO
  3. (CH3)2CO
  4. C/CN
    Write methods for purification of water; explain the process of disinfection of water by chlorine

Chapter # 26

  1. What is Grignard reagent? And how it can be prepared?
  2. Explain structure and reactivity and give reaction of Grignard reagent?

Chapter # 27

  1. Define cement? Give its compounds and how it can be manufactured

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