CHEMISTRY LABORATORY

Paper Code: 
CHY 503
Credits: 
2
Contact Hours: 
60.00
Max. Marks: 
100.00
Objective: 

Course Objectives:

This course will enable the students to –

  • make the students understand the core concepts of green synthesis.
  • provide the knowledge about various spectral techniques.
  • develop quantitative skills for different analytical purposes.

 

Course Outcomes (COs):

Course Outcomes

Teaching Learning Strategies

Assessment Strategies

  
 

On completion of this course, the students will be able to –

CO74:  learn the use of green chemistry principles and processes in laboratory reactions as a benign approach.

CO75: compare the advantages of green procedures over conventional synthesis.

CO76:    assign structures to simple molecules on the basis of infra-red and nuclear magnetic resonance spectroscopy.

CO77: estimate the different functional groups i.e. hydroxyl (monohydric, dihydric, trihydric and phenols) and amino by different methods.

CO78:  estimate the saponification value of different saturated and unsaturated oil.
  • Demonstrations
  • Viva
  • Interactive lectures

 

 

 

 

 
  • Lab experiments
  • Records
  • Viva
  • Group discussions
  • Quiz

 

 

  
 

 

Unit I: 

Theoretical background of Green Chemistry                                  6 Hrs

History, need and goal,  green chemistry and sustainability and background of green chemistry.
Twelve basic principles of green chemistry with their explanation and examples

Synthesis (Green /Conventional)                                                   30 Hrs

a) Aromatic Electrophilic Substitution
i) Acetylation – Acetylation of aniline/salicylic acid.
ii) Nitration - Preparation of 4-nitrosalicylic acid
iii) Bromination - Preparation of p-bromoacetanilide

b) Aldol Condensation:Synthesis of dibenzal propanone
c) Rearrangement: Benzil-Benzilic acid rearrangement
d) Pechmann Condensation for Coumarin synthesis: Clay catalysed solid state synthesis of 7-hydroxy -4- methyl coumarin
e) Diazotization/coupling: Preparation of methyl orange

Spectroscopy                                                         16 Hrs                                  

Interpretation of IR and NMR spectra of simple organic compounds (ethanol, 1-propanol, 2-propanol, methylethanoate, ethyl acetate,stilbene, ethyl acetate, propanone etc).

Quantitative Analysis                                                                   8 hrs

a) Estimation of glucose by Fehling’s /Benedict solution
b) Estimation of saponification value of the given oil.

 

 

Essential Readings: 
  • Vogel’s Textbook of Practical Organic Chemistry, Fifth Edition; B.S. Furniss, A.J. Hannaford, P.W.D. Smith, A.R. Tatchell; Pearson Education, New Delhi, 2003.
  • Monograph on Green Chemistry- Laboratory Experiments- Laboratory Task Force Committee, DST

 

References: 

SUGGESTED READINGS:

  • University Practical Chemistry, Second Edition; P.C. Kamboj, Vishal Publishing House,New Delhi; 2019.

 

e-RESOURCES:

 

Scheme of Examination

  1. The duration of examination will be 4 hrs.
  2. The following exercise will be set in the examination

Quiz based on the theoretical background of green chemistry            10 marks

Organic Synthesis                                                                          18 marks

Organic Estimation                                                                         16 marks

Spectral Analysis                                                                            14 marks

Viva                                                                                              12 marks

Total                                                                                                  70 marks

  1. Organic Synthesis:

The exercise carries 18 marks. Organic preparation will be allotted by lottery. The yield, crystallization and recording of melting point will be given due consideration while awarding marks.

  1. Organic Estimation:

The exercise carries 16 marks. Four marks shall be awarded for preparatory work, setting an apparatus, neat and methodical work. Any modifications will not involve any departure from the basic principles over which experiments are prescribed in the syllabus.

Twelve marks will be awarded for correct observation, use of correct formula, calculation and result within permissible limits.

  1. Theory and procedure                                                               3 marks
  2. Correct observation and proper recording                                3 marks
  3. Use of correct formula and calculation                                      3 marks
  4. Result                                                                                         3 marks

The permissible limit will be decided by the examiner as it varies with the nature of experiment.

  1. Spectral Analysis: Two spectra (Eight marks each) (one IR and one NMR) will be given experiment.

Viva:  Oral questions shall generally be asked over the work assigned to the candidate. The purpose is to find out as to what extent the candidate has understood the basic principles of chemistry.

 

Academic Year: 
2022-2023
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