Chemistry-1.docx 20231114 185144 0000
Chemistry-1.docx 20231114 185144 0000
Chemistry-1.docx 20231114 185144 0000
JEYPORE, KORAPUT
School Affiliation No. 1530297
Chemistry Project on
COMPARATIVE STUDY OF THE RATE OF FERMENTATION OF THE FOLLOWING
MATERIALS:WHEAT FLOUR,GRAM FLOUR,POTATO JUICE,CARROT JUICE,ETC
Submitted by : Submitted to :
CONTENT
ACKNOWLEDEMENT
CERTIFICATE
OBJECTIVE
INTRODUCTION
THEORY
MATERIALS REQUIRED
PROCEDURE
OBSERVATION
CONCLUSION
ACKNOWLEDGEMENT
First of all I would like to thank the almighty for showering his blessing upon me in
all these days. I would also like to express my deepest gratitude to my Chemistry
teacher Mr. P.Kalidas for his unending support and guidance to complete this
project.
I would also like to express tons thanks and gratitude towards our Hon’ble principal
sir Shri Saudagar Kuar who gave this wonderful opportunity to work on his amazing
project ‘COMPARATIVE STUDY OF THE FERMENTATION OF FOLLOWING
MATERIALS:WHEAT FLOUR,GRAM FLOUR,POTATO JUICE,CARROT JUICE,ETC ’.
.
Secondly, I would also like to thank my parents and friends who helped me a lot in
finalizing this project in the given time frame.
Lastly, I would like to thank all my supporters, who motivated me to fulfil this project
in the given time frame.
CERTIFICATE
This is to certify Mr. Subhankar Pattnaik student of standard 12th, English section B
has successfully completed his Chemistry project on ‘COMPARATIVE STUDY OF
THE RATE OF FERMENTATION OF FOLLOWING
MATERIALS:WHEATFLOUR,GRAMFLOUR,POTATOJUICE,CARROTJUICE,ETC’.
For the academic session 2023-2024 under the guidance of Mr. P.Kalidas, PGT
Chemistry.
OBJECTIVE
INTRODUCTION
Wheat flour, gram flour, rice flour and potatoes contain starch as the
major constituent. Starch present in these food materials is first brought
into solution.in the presence of enzyme diastase, starch undergo
fermentation to give maltose. Starch gives blue-violet colour with iodine
whereas product of fermentation starch do not give any characteristic
colour. When the fermentation is complete the reaction mixture stops
giving blue-violet colour with iodine solution. By comparing the time
required for completion of fermentation of equal amounts of different
substances containing starch the rates of fermentation can be compared.
The enzyme diastase is obtained by germination of moist barley seeds in
dark at 15 degrees Celsius. When the germination is complete the
temperature is raised to 60 degrees Celsius to stop further growth. The
seeds are crushed into water and filtered. The filtrate contains enzyme
diastase and is called malt extract.
MATERIALS REQUIRED
Conical flask
Test tube
Funnel
Filter paper
Water bath
1 % Iodine solution
Yeast
Wheat flour
Gram flour
Rice flour
Potato
Aqueous NaCl solution
PROCEDURE
• Take 5 gms of wheat flour in 100 ml conical flask and add 30 ml of distilled
water.
• Boil the contents of the flask for about 5 minutes
• Filter the above contents after cooling, the filtrate obtained is wheat
flour extract.
• To the wheat flour extract. taken in a conical flask. Add 5 ml of 1% aq. NaCl
solution.
• Keep this flask in a water bath maintained at a temperature of 50-60
degree Celsius. Add 2 ml of malt extract.
• After 2 minutes take 2 drops of the reaction mixture and add to diluted
iodine solution.
• Repeat step 6 after every 2 minutes. When no bluish colour is produced
the fermentation is complete.
• Record the total time taken for completion of fermentation.
• Repeat the experiment with gram flour extract, rice flour extract, potato
extract and record the observations
OBSERVATION
CONCLUSION
Rice flour takes maximum time for fermentation and wheat flour takes the
minimum time for fermentation.
BIBLIOGRAPHY
http://neerajminichemistry.weebly.com
https://www.scribd.com