properties and changes of properties in matter


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Properties
Bleaching powder is a yellowish white powder and smells strongly of chlorine. It is soluble in water. The lime present is always left behind as an insoluble salt. For this reason it is also called chloride of lime. Bleaching powder is oxidised to chlorine when exposed to air. When bleach..
Properties
1) Ammonium sulphate is a colourless crystalline solid. 2) It is soluble in water to a great extent. The solubility of this salt in water is 78 g at 30 o C. 3) When dissolved in water it absorbs heat and causes coolin..
Properties
1) Ammonium carbonate is a colourless crystalline solid. 2) It is soluble in water. 3) When exposed to the atmosphere, it undergoes dissociation and hence smells of ammoni..
Properties
formation of beryllium chloride from beryllium hydride It is an amorphous white solid stable upto 250C. After this temperature it begins to evolve hydrogen gas. It is moderately stable in air or water but is rapidly hydrolyzed by acids giving H 2 . ..
Properties
Some physical characteristics of carbon dioxide are given below M.P B.P. Density (273K) CO bond length D Hf 216.4 K 194.5 K 1.977 g/L 116.3pm -393.5kJ/mol(5.2 atm) (Sublimes) CO 2 is a colorless gas with a faint pungent smell. It is about 1.5 times heav..
Properties
action of quicklime with water Calcium oxide (quicklime) is a white amorphous solid. On heating, quicklime (CaO) glows at high temperatures. This glow of white dazzling light is called lime light. Quicklime melts at 2870 K (2597C). On exposure to the atmosphere, it absorbs moisture and carbon dioxide to finally give calcium c..
Properties
Calcium carbonate is a white fluffy powder. It is almost insoluble in wate..
Properties
 setting of Plaster of Paris It is a white powder. When mixed with water (1/3 of its mass), it evolves heat and quickly sets to a hard porous mass within 5 to 15 minutes. During setting, a slight expansion (about 1%) in volume occurs so that it fills the mould completely and takes a sharp impression. The process of setting oc..
Properties
action of calomel on heat 1) It is a white powder which is insoluble in water. 2) Hg 2 Cl 2 on heating dissociates into HgCl 2 and Hg...
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