INTRODUCTION Civilization has been overwhelmed with fearful reports that mankind is steadily working towards self – destruction through the process of uncontrolled pollution of the environment. A casual look at our surroundings shows reckless attitude of people towards environmental preservation. Due to this development‚ regulations and standards have been set to ensure cleaner and safer environment. These regulations are enforced by agencies like National Environmental Standard and Regulation
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The structure and function of carbohydrates A carbohydrate is an organic molecule containing only Carbon‚ Hydrogen and Oxygen with the general formula Cn(H20)n. They are made up of individual molecules called monomers which are joined together by condensation reactions to make a longer chain called a polymer. Carbohydrates are categorised in to three main groups; monosaccharides‚ disaccharides and polysaccharides. Monosaccharides are single sugars and are sweet tasting soluble substances such
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Rubidium To start off this amazing element has just a little bit of history to it. At first when I heard about this element I thought it was some type of gas but it can turn it to a liquid at a certain type of liquid. But is actually a very shiny type of metal. Rubidium was discovered by Kirchoff and Bunsen in 1861 through the use of a spectroscope. Rubidium metal can be made by minimizing rubidium chloride with calcium with other substances. The cost of this metal in small quantities is approximately
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chemists as sodium bicarbonate‚ bicarbonate of soda‚ sodium hydrogen carbonate‚ or sodium acid carbonate. It is classified as an acid salt‚ formed by combining an acid (carbonic) and a base (sodium hydroxide)‚ and it reacts with other chemicals as a mild alkali. At temperatures above 300 degrees Fahrenheit (149 degrees Celsius)‚ baking soda decomposes into sodium carbonate (a more stable substance)‚ water‚ and carbon dioxide. Sodium bicarbonate was discovered by two workers at a college of medicine in
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difficult to isolate. The easiest way to get boron is by heating borax and carbon. Boron is a poor conductor of electricity at room temperature but when at high temperatures boron shows good conductivity. Boron is nonreactive to water‚ oxygen‚ acids and alkali. One of the many uses for boron is cleaning supplies and laundry detergent. Boron is found in borax‚ which is in those supplies. The borax and other borates clean and bleach by converting some water molecules into hydrogen peroxide and since the
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How does pH affect the activity of the Amylase? Abstract: In my experiment I aimed to observe how ranging pH levels will affect the rate in which amylase will break down the starch molecules. I will be measuring the time it takes for the dark liquid to disappear and leave a yellow brown liquid to be shown‚ which would show that there is no starch present in the solution because it would have broken into maltose by adding amylase. Results did not fully demonstrate what we expected in our hypothesis
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Apeejay School Kolkata (WEST BENGAL) DEPARTMENT OF CHEMISTRY This is to satisfy that Ritika Kataruka bearing Roll no _______ Studyng in class XII (Science) of this institution has successfully completed the Chemistry Project. “To Study the quantity of casein present in different samples of Milk” Based on the syllabus of C.B.S.E. council for the session 2013-2014 AISSCE under my guidance and supervision and has given satisfactory account
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Chemistry has been called the science of what things are. Its intent is the exploration of the nature of the materials that fabricate our physical environment‚ why they hold the different properties that depict them‚ how their atomic structure may be fathomed‚ and how they may be manipulated and changed. Although organic reactions have been conducted by man since the discovery of fire‚ the science of Organic chemistry did not develop until the turn of the eighteenth century‚ mainly in France at
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The lipid layer is what makes them resistant to acids and alkalis‚ as well as some other chemicals. This explains why the ascaris lumbricoides are such a resilient parasite. Adult female worms can grow up to over 12 inches long‚ and are larger than the males. The males tend to only grow up to 11.8110 inches. Adult
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element. Columns of elements help to distinguish groups in the periodic table. Elements within a group share several common properties and often have the same outer electron arrangement. Most of the elements on the periodic table are metals. The alkali metals‚ alkaline earths‚ basic metals‚ transition metals‚ lanthanides and actinides all are groups of metals. The present periodic table has room for 118 elements. Elements aren ’t discovered or created in order of atomic number. Scientists are working
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