1) The document presents the results of a comparative study and qualitative analysis of four brands of cold drinks (Coca Cola, Pepsi, Fanta, and Sprite). 2) Chemical tests were performed and all four brands were found to contain carbon dioxide, glucose, sucrose, alcohol, and phosphate, though the amounts varied between brands. 3) Specifically, Coca Cola had the highest acidity and alcohol content, while Fanta had the lowest carbon dioxide and Sprite had the lowest glucose and alcohol.

1. COMPARATIVE STUDY AND
QUALITATIVE ANALYSIS OF
DIFFERENT BRANDS OF COLD
DRINKS AVAILABLE IN MARKET
Submitted By Supervised By
SAUMYADEEP BORA MISS BANANI KAUSHICK
B.Sc. 6th Semester Department of Chemistry
Department Of Chemistry Nowgong College, Nagaon
Nowgong College, Nagaon

2. INTRODUCTION
 A cold drink is a drink that contains carbonated water,a sweetener and a
natural or artificial flavouring.
 Cold drinks also contain Caffeine,Alcohol,Phosphate,CO2,Colorings and
Preservatives.
 The origin of cold drinks lie in the development of fruit flavoured drinks
like ‘Sharbat’, ‘Lemonade’-made of water and lemon juices sweetened with
honey without carbonated water.
 The over consumption of sugar sweetened cold drinks is associated with
obesity,hypertension,type 2 diabetes,dental caries
and low nutrient levels.
Uses of Cold drinks:-
 Cold drinks can be used as toilet cleaners.
 They can remove rust from chrome car bumpers.
 They clean corrosion from car battery terminals.
 Cold drinks can be used to remove grease from clothes.
 They can loose a rusted bolt.

3. Disadvantages of Cold drinks:-
 Cold drinks contain large amount of sugar so they cause problems in
diabetes patients.
 Cold drinks have ability to dissolve calcium so they are harmful for our
bones.
 Cold drinks contain phosphoric acid which is highly acidic.
 Cold drinks cause Hypokalemia diseases, Dental caries and Obesity.

4. OBJECTIVE
The general objective of the Project entitled
“Comparative Study and Qualitative Analysis of
Different Brands of Cold Drinks Available in Market”
was to determine the different contents present in cold
drinks.

5. MATERIALS REQUIRED
CHEMICALS REQUIRED
1. Four different cold dinks-
Coca Cola,Pepsi,Fanta,Sprite
2. Test Tubes
3. Test Tube Holder
4. Test Tube Stand
5. Stop Watch
6. Beaker
7. Burner
8. PH Paper
9. Tripod Stand
10. 10 ml Graduated Cylinder
11. China Dish
12. Wire Gauge
13. Water Bath
1. Iodine Solution
2. Potassium Iodide
3. Sodium Hydroxide
4. Fehling’s A & B Solution
5. Lime Water
6. Conc. Nitric Acid
7. Benedict’s Reagent
8. Ammonium Molybdate

6. DETECTION OF PH
EXPERIMENT:-
1-2 drops of sample of cold drinks of each brand were
taken and put on the PH paper.The change in the colour of PH
paper was noticed and was comapared with standard PH scale.
OBSERVATION:-
INFERENCE:-
All the four brands of cold drinks were found to be acidic in nature.

7. TEST FOR CARBON DIOXIDE(CO2)
EXPERIMENT:-
As soon as the bottles were opened one by one the samples were
passed through lime water. The lime water turned milky.
OBSERVATION:-
Sl. No. Name of Brand Time Taken(Sec) Conclusion
1 Coca Cola 30 CO2 is present
2 Pepsi 35 CO2 is present
3 Fanta 37 CO2 is present
4 Sprite 23 CO2 is present
INFERENCE:-
All the Cold drinks contain
dissolved CO2 in water.

8. TEST FOR GLUCOSE
The presence of Glucose was detected by the following tests-
1)BENEDICT’S REAGENT TEST
Small samples of each cold drniks were taken in separate test tubes and
a few drops of Benedict’s reagent were added. The test tubes were heated
for few seconds.The formation of Reddish colour confirms the presence of
glucose.
OBSERVATION:-
INFERENCE:-
All the samples gave positive test for glucose with Benedict
reagent.Hence all the samples contain glucose.

9. 2)FEHLING’S SOLUTION TEST
Small samples of each brand of cold drniks were taken in separate
test tubes and a few drops of Fehling’s A & B solution were added in
equal amount. The test tubes were heated in a water bath for 10 minutes.
Appearance of Reddish –Brown ppt. confirmed the presence of glucose.
OBSERVATION:-
INFERENCE:-
All the samples gave positive test for glucose with Fehling’s A & B
solution.Hence all the samples contain glucose.

10. TEST FOR SUCROSE
EXPERIMENT:-
5 ml samples of each brand of cold
drinks were taken in separate china dishes
and were heated very strongly until changes
occurs.Black coloured residue left
confirmed the presence of sucrose in cold
drinks.
OBSERVATION:-
INFERENCE:-
All the samples gave black coloured residue hence they contain
sucrose.

11. TEST FOR ALCOHOL
EXPERIMENT:-
Small samples of each cold drinks were taken in separate test tubes
and Iodine solution followed by KI and NaOH solution were added to
each test tubes. Then the test tubes were heated in hot water bath for 30
minutes. Appearance of yellow coloured ppt. confirmed the presence of
Alcohol in cold drinks.
OBSERVATION:-
INFERENCE:-
All the samples gave positive test for alcohol. Hence all the samples
contain alcohol.

12. TEST FOR PHOSPHATE
EXPERIMENT:-
Small samples of each cold drinks were taken in separate test
tubes and Ammonium Molybdate followed by Conc. HNO3 acid
solution were added to each test tubes. Then the test tubes were heated
in water bath for sometimes. Apperance of canary-yellow ppt.
confirmed the presence of phosphate ions in cold drinks.
OBSERVATION:-
INFERENCE:-
All the samples gave positive test for phosphate. So all of them
contain phosphate.

13. After conducting several tests it was
observed that all the samples
gave positive result for the
corresponding tests and which can be
represented in the table as-
Hence all the four samples are acidic and contain CO2,
glucose, sucrose, alcohol and phosphate. But the
amount of these compounds vary in each sample.
Sl. No. TESTS RESULT
1 Detection of PH Acidic in nature
2 Test for CO2 CO2 is present
3 Test for Glucose Glucose is present
4 Test for Sucrose Sucrose is present
5 Test for Alcohol Alcohol is present
6 Test for Phosphate Phosphate is present

14. CONCLUSION
1) All cold drinks are acidic in nature.Coca Cola is most
acidic while Fanta is least acidic among the four brands
taken.
2) Sprite has more dissolved CO2 and Fanta has less
dissolved CO2 among the four brands.
3) Fanta contains maximum amount of glucose and Sprite
contains minimum amount of glucose.
4) Though all the four samples contain sucrose but the
amount of sucrose varies in each brand of clod drinks.
5) Coca Cola contains highest amount of alcohol where as
Sprite contains lowest amount of alcohol.
6) The amount of phosphate ion is highest in Coca Cola
while the amount of phosphate ion is lowest in Sprite.

15. THANK
YOU…