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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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Removal of H2O from atmospheric air using anhydrous CaCl2 is an example of which change- physical or chemical?
Physical change as CaCl2 is a hygroscopic substance which absorbs H2O without actually reacting with it.
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Removal of H2O from atmospheric air using anhydrous CaCl2 is an example of which change- physical or chemical?
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Suggest the name of a Lewis acid other than anhydrous aluminium chloride which can be used during ethylation of benzene.
The ethylation reaction of benzene involves the addition of an ethyl group on the benzene ring. Such a reaction is called a Friedel-Craft alkylation reaction. This reaction takes place in...
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Suggest name of any other Lewis acid instead of anhydrous aluminium chloride which can be used for ethylation of benzene?
anhydrous aluminium chloride FeCl3
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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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A small amount of silica gel and a small amount of anhydrous calcium chloride are placed separately in two beakers containing water vapour.
[Hint : Silica gel : Adsorption, Anhydrous CaCl2 : Absorption, as it forms Ca- Cl2.2H2O]
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