Organic chemistry Lesson plan Class XII CBSE Topic "distitinguish aldehydes & Ketones, primary secondary and tertiary alcohols, alcohols & phenols

A.K.GUPTAA.K.GUPTA
P.G.T.CHEMISTRY
KENDRIYA VIDYALAYA BALLYGUNGE
KOLKATA-700019
WESTBENGAL,INDIA
1AKG/KVB/Distinguish

Learning Objectives:Learning Objectives:
at the end of the lesson the pupil shall-at the end of the lesson the pupil shall-
• KnowKnow the structure of the compound from itsthe structure of the compound from its
common/IUPAC namecommon/IUPAC name
• Tollens reagent, Fehling's solution, ferric chloride,Tollens reagent, Fehling's solution, ferric chloride,
Iodoform test, Lucas reagent etc.Iodoform test, Lucas reagent etc.
• Understand-Understand-(I) reducing & non reducing property of(I) reducing & non reducing property of
aldehyde & ketone based on the structure of thealdehyde & ketone based on the structure of the
functional group.functional group.
• Difference in reactivity of 1Difference in reactivity of 1ºº,2,2ºº,3,3ºº alcohols towardsalcohols towards
nucleophilic reactions.nucleophilic reactions.
• Iodoform testIodoform test
• ApplyApply the knowledge gained to distinguish variousthe knowledge gained to distinguish various
given compoundsgiven compounds
• Develops SkillDevelops Skill to perform experiment, draw conclusionsto perform experiment, draw conclusions
predict ,the compound/functional group.predict ,the compound/functional group.

INSTRUCTIONAL AIDS USEDINSTRUCTIONAL AIDS USED
• Power point presentation, computerPower point presentation, computer
• Chalk & Black BoardChalk & Black Board
• Chemicals, test tubes sprit lamps etcChemicals, test tubes sprit lamps etc
for demonstrationfor demonstration
• Work sheetsWork sheets
etcetc

Write the structure of the followingWrite the structure of the following
compoundscompounds
Methanol Formaldehyde Benzophenone
Ethanol Acetaldehyde Pentan-2-one
Propan-1-ol Acetone Pentan-3-one
Propan-2-ol Benzaldehyde t-Butyl alcohol
Phenol Acetophenone Sec-Butyl alcohol
AKG/KVB/Distinguish 4

What is ?
1 Lucas Reagent ZnCl2 + Conc HCl
2 Tollens Reagent Ammoniacal solution of Silver
nitrate .
[Ag(NH3)2]OH
3 Fehling Solution-A Aq soln of CuSO4
4 Fehling Solution-B Alkaline soln of Rochelle salt(sod
pot tartarate)
5 Iodoform Test

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)

Tollens Test For Aldehydes

Test For Phenolic –OH Group
Sample of Phenol + Neutral FeCl3 soln
Violet colouration

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

TestTest ObservationObservation InferenceInference
Acetaldehyde
Benzaldehyde
Write the test to distinguish between
Acetaldehyde & Benzaldehyde

Propanone
Propan-2-ol
Propanone & Propan-2-ol

Methanol
Ethanol
Ethanol & Methanol

Acetophenone
Benzophenone
Acetophenone & Benzophenone

Ethanal
Propanal
Ethanal & Propanal

Benzaldehyde
Acetophenone
Benzaldehyde & Acetophenone

Propanone
Propanal
Propanone & Propanal

Penta-2-one
Pentan-3-one
Penta-2-one & Pentan-3-one

1-Propanol
2-Propanol
1-Propanol & 2-Propanol

REFERNCEREFERNCE
• Learning to teach –by Linda Shalaway
(scholastic professional books )
• Starko, A.J. Creativity in the Classroom.
White Plains, N.Y;Publishers,1995
• Modern’s ABC of Chemistry – Dr.S.P.Jauhar;
Modern Publication.
• http://www.classroom.net
• http://gsn.org
• http://scholastic.com/Instructor

Organic chemistry Lesson plan Class XII CBSE Topic "distitinguish aldehydes & Ketones, primary secondary and tertiary alcohols, alcohols & phenols

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Organic chemistry Lesson plan Class XII CBSE Topic "distitinguish aldehydes & Ketones, primary secondary and tertiary alcohols, alcohols & phenols