सराव कुरु याः ओलखा पाहू मी कोण आणि माझा समावेश कोणत्या णेषण प्रकारात दुराल ? 9 मी तुमच्या लहान आतड्यामध्ये रामोजी प्रत्यक्ष अन्नाचे शोषण कराल
विज्ञान विषय
मी तुमच्या लहान आतड्यामध्ये राहतो आणि प्रत्येक क्षणाची शोषण करतो मी कोण
Answers
Explanation:
Hint: Calcium carbonate is also known as limestone. It is also a dietary supplement and is used when the calcium intake is not enough. When calcium carbonate is heated in a test tube, it involves a colourless and an odourless gas and also a white precipitate.
Complete step by step answer:
Calcium carbonate is a substance found in rocks such as minerals calcite and aragonite. It is a chemical compound with the chemical formula CaCO3 .
It is the main component of pearls and the shells of marine organisms, snails and even eggs. It is also an active ingredient in agricultural lime and is generally created when calcium ions in hard water react with carbonate ions to create lime scale. Calcium carbonate also has medicinal uses. It is used as a calcium supplement or as an antacid but its excessive consumption can be hazardous and can cause poor digestion.
The chemical properties of calcium carbonate includes the reaction of CaCO3 with an acid and the thermal decomposition of calcium carbonate.
(A). When CaCO3 reacts with an acid to produce carbon dioxide. The reaction equation is:
CaCO3(s)+2H+(aq)→Ca2+(aq)+CO2(g)+H2O(g)
(B). When CaCO3 is heated, it releases carbon dioxide CO2 known as thermal decomposition or also calcination.
The reaction equation is:
CaCO3(s)→CaO(s)+CO2(g) .
When CaCO3 is heated, the calcium oxide called quicklime and carbon dioxide as a gaseous product is formed.
Hence, when CaCO3 is heated it decomposes to give calcium oxide and carbon dioxide.
So, the correct answer is Option B,C .
Note: CaCO3 also reacts with water and with CO2 to form calcium bicarbonate
The reaction involved is:
CaCO3(s)+CO2(g)+H2O(l)→Ca(HCO3)2(aq)
This reaction is important in the erosion of carbonate rock and ions that even lead to hard water.