কাজ
সাধারণ সর্দি-কাশির কারণে জ্বর, জ্বর সৃষ্ট ফ্লু-এর মতো অসুস্থতা, মাথাব্যথা, সাধারণ সর্দি-কাশির কারণে ব্যথা, ফ্লু-এর মতো অসুস্থতার কারণে ব্যথা, ব্যাথা, মাসিক, রিউম্যাটিক ব্যথা, বেদনা, পেশী, দাঁতে ব্যথা চিকিৎসায় নির্দেশিত হয়।
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What is calcium carbonate (caco3)commonly known as?
Calcium Carbonate (CaCO3) commonly known as Limestone, Marble, Chalk.
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What is calcium carbonate (caco3)commonly known as?
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Write equations for the reactions of (i) iron with steam (ii) calcium and potassium with water
(i) Iron react with steam to form the metal oxide and hydrogen. 3Fe(s) + 4H2O(g) → Fe3O4(s) + 4H2(g) (ii) The reaction of calcium with water is exothermic but the heat evolved...
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Write equations for the reactions of (i) iron with steam (ii) calcium and potassium with water
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In the Modern Periodic Table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38.
Answer : The element with atomic number 12 has same chemical properties as that of calcium. This is because both of them have same number of valence electrons (2).
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Explain the significance of sodium, potassium, magnesium and calcium in biological fluids.
Solution: Significance of sodium and potassium in biological fluids: K+ and Na+ cations are present in the red blood cells. The ratio of K+ to Na+ ions in mammals such as human beings, rabbits, rats and horses is 7:1.
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Name a suitable technique of separation of the components from a mixture of calcium sulphate and camphor.
The process of sublimation is used to separate a mixture of camphor and calcium sulphate. In this process, the sublimable compound changes from solid to vapour state without passing through...
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Bone matrix is rich in (a) fluoride and calcium (b) calcium and phosphorus (c) calcium and potassium (d) phosphorus and potassium
(b) calcium and phosphorus
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Write the chemical formula of the following: (a) Magnesium chloride (b) Calcium oxide (c) Copper nitrate (d) Aluminium chloride (e) Calcium carbonate
(a) Magnesium chloride →MgCl2 (b) Calcium oxide →CaO (c) Copper nitrate →Cu(NO3)2 (d) Aluminium chloride →AlCl3 (e) Calcium carbonate →CaCO3
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On heating calcium carbonate gets converted into calcium oxide and carbon dioxide. (a) Is this a physical or a chemical change?
(a) Chemical change (b) Acidic and basic solutions can be prepared by dissolving the products of the above process in water CaO+H2O →Ca(OH)2 (basic solution) CO2 + H2O→H2 CO3 (acidic solution)
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