Download complete chemistry project topics PDF for university, polytechnic and college of education, abstarct, HND, BSC research materials. This 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. Chemistry Project 12th - Download as Word Doc .doc /.docx), PDF File .pdf), Text File .txt) or read online.
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An experienced chemistry professor used to say that it took about one Don't worry, our list of chemistry science and engineering projects still has lots of. Projects are available in PDF format inside archive.(Acrobat Reader). ▫ All projects are contributed by students, click here if you want to send yours. Chemistry. PDF | On Nov 8, , Alvino Rock and others published FOOD PRESERVATION CHEMISTRY PROJECT REPORT.
Chemistry project for Class 12 1. Department of Chemistry Kendriya Vidyalaya Khagaria. The report is found worthy of acceptance as final project report for the subject Chemistry of Class XII. He has prepared the report under my guidance. Gupta Sir for guiding me immensely through the course of the project. He always evinced keen interest in my work. My sincere thanks go to Shri Yeshdeep Rohilla, Our principal sir, for his co-ordination in extending every possible support for the completion of this project.
Last but not the least; I would like to thank all those who had Helped directly or indirectly towards the completion of this project.
XII Science 7. Certificateby Teacher. Certificateby Examiner. Objectives of the Project. Introduction Every Health book insists on the chewing of food. The act of chewing stimulates the excretionof saliva. Saliva mixes up with the food and helps its digestion. That is, the enzyme ptyalin or amylase present in human saliva hydrolyzes the big moleculesof food into many molecules.
For example starch into mono-saccnaricies maltose and glucose; proteins into amino acids and fats into fatty acids and glycerol. Thus saliva not only helps in digestion of food but convert it into energy generating substances. Further, enzymes and their activity are very sensitive to temperature and ph. Even a slight variationin these two factors, can disturb the action of enzymes.
In other words, digestion of food by salivary amylase is also effected by pH and temperature and can be verified experimentally. For example, hydrolysis of starch can be verified by testing it with iodine solution. Starch forms blue coloured complex with iodine. If no starch is present in a system it will not give blue colour with iodine. Now take about 20ml of lupe warm water in the mouth and gangle for about three minutes so that saliva mixes up well with it.
Spit this into a beaker. Filter, if there is any suspended impurity clear filtrate is saliva solution and contains enzyme ptyalin. Dilute the paste by adding 50ml water and boil for about 5 minutes. Add 2ml of saliva solution into it.
Mix the solutions well by shaking the tube carefully and start a step watch. Note the colour produced, if any.
Record the time and blue colour intensity. That is whole of the starch has got digested or hydrolysed.
Chemistry Experiment 2 Procedure: Note the intensity of blue coloured form. Conclusion Starch get hydrolysed by saliva amylase Chemistry Experiment 3 Procedure: You just clipped your first slide! Limca 4. Fanta contain glucose, alcohol, sucrose, phosphate and carbon dioxide.
All soft drinks are acidic in nature. On comparing the pH value of different brands Coca Cola is the most acidic and Limca is least acidic of all the four brands taken. High sugar content in soft drinks leads to weight gain. The high amount of sugar consumed through soft drinks lead to the development of bacteria that attack the teeth thus aggravating dental problems. PHOSPHATE High level of phosphorus in soft drinks can be especially hazardous because the kidneys are less able to excrete excess phosphorus, causing depletion of vital calcium.
Excess phosphorus is therefore, one of the major contributing factors to the development of osteoarthritis.
Phosphoric acid in soft drinks easily dissolves tooth enamel. The phosphoric acid and carbon dioxide combination makes soft drinks highly acidic. This reacts with the acids already present in the stomach to create a more acidic environment.
The phosphoric acid in soft drinks reacts with the hydrochloric acid in the stomach, causing indigestion, gas and bloating. Throughout the digestive system, that starts from the mouth and ends up at the anus liver, gallbladder and pancreas play the role of accessory organs only the stomach can resist an acidic environment up to pH 2.
But before the acidity of soft drink reaches the stomach it passes through all the other organs involved in the digestive system thus causing an abnormal acidic environment. Hence the linings of the mouth, pharynx and oesophagus are highly sensitive to acids. Flag for inappropriate content. Related titles.
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