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Plaster of Paris
Secure some plaster of Paris and mix a small amount with water. It must be worked quickly or it will harden whereas being mixed. Place the mixture in moulds and let it set unless very hard. Study the appearance and properties of the samples. 3 Collections of building materials Collect samples of all the dissimilar types of rock or mineral building materials available in your locality like as marble, granite, slate, limestone, brick, cement, plaster, etc. These may be added to your collection after proper labels have been close to the samples
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Chemical Evolution The question of how life came into being in the first place still remained unanswered. To find an answer to this question means looking back billions of y
Explain the Digestion of Food Salivary amylase or ptyalin acts on cooked starches (polysaccharides) and changes them into maltose as shown herewith. Boiled starch → soluble
Explain Steroids Steroids form a group of compounds which are often found in association with fats but structurally and functionally these are somewhat unrelated to most
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What is an ionic bond? By definition, an ionic bond is a chemical bond that forms between two or more oppositely charged ions. The animation above shows an ionic bond between a
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Stereo isomerism:- Stereo isomerism occurs when the same compound due to different spatial arrangement of the groups attached to its asymmetric carbon atom exists in m
100 words
Making a precision reflecting telescope It is fairly beyond the scope of this book to include the intricate details for mirror grinding and testing. Though, some teachers may w
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