What is calcium carbonate (caco3)commonly known as?
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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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Hard calcium carbonate structures are used as skeleton by (a) Echinodermata (b) Protochordata (c) Arthropoda (d) Nematoda
(a) Echinodermata
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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 down the names of compounds represented by the following formula: (i) Al2(SO4)3 (ii) CaCl2 (iii) K2SO4 (iv) KNO3 (v) CaCO3
(i) Al2(SO4)3→ Aluminium sulphate (ii) CaCl2→ Calcium chloride (iii) K2SO4→ Potassium sulphate (iv) CaCO3→ Calcium carbonate
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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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Mention the role of following : (a) SiO2 in the metallurgy of Cu. (b) CaCO3 in the metallurgy of F
[Hint : (a) Flux (b) CaCO3 decomposed to CaO, which acts as flux. (c) Reducing agent ...
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If water contains dissolved calcium hydrogen carbonate, out of soaps and synthetic
Synthetic detergents are preferred for cleaning clothes. When soaps are dissolved in water containing calcium ions, these ions form insoluble salts that are of no further use. However, when synthetic detergents...
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Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime.
(B) (ii) and (iii) Slaking of lime is accompanied by liberation of heat, hence it is an exothermic reaction. Calcium hydroxide is an alkali and its aqueous solution (i.e., lime water)...
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Marble contains ,(A) calcium hydroxide (B) calcium chloride (C) calcium carbonate (D) calcium oxide
(C) calcium carbonate Marble contains calcium carbonate and its chemical formula is CaCO3.
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