Question:
The correct sequence of thermal stability of the following carbonates is
The correct sequence of thermal stability of the following carbonates is
Updated On: Jul 13, 2024
- ${BaCO3 < CaCO3 < SrCO3 < MgCO3}$
- ${MgCO3 < CaCO3 < SrCO3 < BaCO3}$
- ${BaCO3 < SrCO3 < CaCO3 < MgCO3}$
- ${MgCO3 < SrCO3 < CaCO3 < BaCO3}$
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The Correct Option is B
Solution and Explanation
Thermal stability of Alkaline earth metals carbonates increases down the group.
because down the group polarizing power of cation decreases. So thermal stability increases.
Hence, Thermal stability order :
${MgCO3 < CaCO3 < SrCO3 < BaCO3}$
because down the group polarizing power of cation decreases. So thermal stability increases.
Hence, Thermal stability order :
${MgCO3 < CaCO3 < SrCO3 < BaCO3}$
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Concepts Used:
Group 2 Elements
The group two or alkaline earth metals are s-block elements with two electrons in their s-orbital. They are alkaline earth metals. They are named so because of the alkaline nature of the hydroxides and oxides.
Alkaline earth metals are characterized by two s-electrons. This group of elements includes:
- Beryllium (Be)
- Magnesium (Mg)
- Calcium (Ca)
- Strontium (Sr)
- Barium (Ba)
- Radium (Ra)
Elements whose atoms have their s-subshell filled with their two valence electrons are called alkaline earth metals. Their general electronic configuration is [Noble gas] ns2. They occupy the second column of the periodic table and so-called as group two metals also.