COMPARATIVE STUDY AND QUALITATIVE ANALYSIS OF DIFFERENT BRANDS OF COLD DRINKS AVAILABLE IN MARKET.

1702 Words Nov 2nd, 2013 7 Pages
COMPARATIVE STUDY AND QUALITATIVE ANALYSIS OF DIFFERENT BRANDS OF COLD DRINKS AVAILABLE IN MARKET. CHEMISTRY PROJECT On Content of Cold Drinks Available in the Market Poison vs. Nutrition AIM COMPARATIVE STUDY AND QUALITATIVE ANALYSIS OF DIFFERENT BRANDS OF COLD DRINKS AVAILABLE IN MARKET. CERTIFICATE It is hereby to certify that, the original and genuine investigation work has been carried out to investigate about the subject matter and the related data collection and investigation has been completed solely, sincerely and satisfactorily by Navi Arora of CLASS XII A, Mother Divine Sr. Sec. Public School (Rohini), regarding his project titled “Content of Cold Drinks Available in the Market”. Teacher’s signature Acknowledgement It would be …show more content…
The change in the color of pH paper was noticed and was compared with the standard pH scale. OBSERVATION SERIAL NO NAME OF DRINK COLOUR CHANGE PH VALUE 1 COCA COLA PINK 1-2 2 SPRITE ORANGE 3 3 LIMCA PINKISH 3-4 4 FANTA LIGHT DRINK 2-3 INFERENCE Soft drinks are generally acidic because of the presence of citric acid and phosphoric acid. pH values of cold drink of different brands are different due to the variation in amount of acidic contents. TEST FOR CARBON DIOXIDE EXPERIMENT As soon as the bottles were opened, one by one the sample was passed through lime water. The lime water turned milky. OBSERVATON SR. NO NAME OF THE DRINK TIME TAKEN (SEC.) CONCLUSION 1 COCA COLA 26.5 CO2 IS PRESENT 2 SPRITE 21 CO2 IS PRESENT 3 LIMCA 35 CO2 IS PRESENT 4 FANTA 36 CO2 IS PRESENT INFERENCE All the soft drinks contain dissolved carbon dioxide in water. The carbon dioxide (CO2) dissolves in water to form carbonic acid, which is responsible for its tangy taste. CHEMICAL REACTION INVOLVED Ca(OH)2 (s) + CO2(g) ———–àCaCO3 (s) + H2O(s) TEST FOR GLUCOSE Glucose is a reducing sugar acid. Its presence is detected by the following test:- 1. BENIDICTS’S SOLUTION TEST:- A small sample of cold drink of different brands was taken in a test tube and a few drops of Benedict’s reagent were added. The test tube was heated for few seconds. Formation of reddish color…

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