LESSON PLANNAME OF TEACHER: A.K.GUPTA

 

SUBJECT: Chemistry  

TOPIC: Distinction Test of Organic Compounds 

SUBTOPIC: Distinction of –i. aldehydes & ketonesii. 1º,2º & 3º alcohols iii. Alcohol & phenol

  COMPETENCY DESIRED :  at the end of this lesson the pupil should be able to distinguish the following compounds by suitable chemical test-

i. aldehydes & ketonesii. 1º,2º,3º alcohols iii. Alcohol & phenol

  INTRODUCTION TO THE LESSON:  CBSE Guidelines for Units 10-13 (Unit10-Haloalkanes & Haloarenes Unit11-Alcohols Phenols & Ethers  Unit12-

Aldehydes Ketones & Carboxylic Acids Unit 13– Organic Compounds Containing Nitrogen)The questions in CBSE Examination should include questions on-

 Nomenclature 2 Marks Reasoning 6 Marks Distinguish between the compounds 3 Marks Name Reactions 2 Marks Reaction Mechanism 2 Marks Word Problems (conversions) covering properties and reactions of functional groups 5 MarksThese various types of the question asked from the chapters belonging to Organic Chemistry are interrelated as shown- Nomenclature Reasoning               Distinguish between the compounds Word Problems Conversions Properties & reactions of functional groups

The knowledge & understanding of the chemical tests to distinguish the pair of compounds shall develop the skill & competency to answer the other types of questions also. USE OF TLM & TEACHING METHODOLOGY:

Demonstration Power point CD Use of different methods to match different purposes and outcomes-informing, describing, explaining,

watching, questioning, Worksheet- for Peer & Self assessment– to explore misconception, to provide immediate support in the 

class room

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DATE:27/01/2014 CLASS:XIIA PERIOD:1st   DURATION:40 Minutes

CONTENT:1. What is ?

Reagent Chemical Composition Use

1 Lucas Reagent ZnCl2 + Conc HCl 2 Tollens Reagent Ammoniacal solution of Silver nitrate ,

[Ag(NH3)2]OH3 Fehling Solution-

AAq soln of CuSO4

4 Fehling Solution-B

Alkaline soln of Rochelle salt(sod pot tartarate)

5 Ferric chloride FeCl32. What is Iodoform test?Compounds having O OH ║ │ R─C-CH3 Or R ─C –CH3 │ H Structure on reaction with mixture of NaOH & I2 give yellow coloured ppt of iodoform (CHI3)

3.What is the test of Phenolic –OH Group?Sample of Phenol + Neutral FeCl3 solnà Violet colouration4.Test for 1º,2º,3º Alcohol-

Test Observation 3º Alcohol  + Lucas Reagent (ZnCl2 + Conc HCl ) Turbidity appears immediately 

2º Alcohol  -do-  Turbidity appears after some time 

1º Alcohol  -do-  Turbidity does not appear 

Let’s check our understanding –(To be discussed in class room)Write the test to distinguish between i. Acetaldehyde & Benzaldehydeii. Ethanol & Methanoliii. Ethanol & Phenoliv. Acetophenone & Benzophenonev. Ethanal & Propanalvi. Benzaldehyde & Acetophenonevii. Propanone & Propanalviii. Penta-2-one & Pentan-3-oneix. 1-Propanol    &   2-Propanol ASSIGNMENT- work sheet 1 and 2

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  Teacher’s Signature 

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