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Question: Thermal stability of \[BaC{O_3}\] , \[CaC{O_3}\] and \[MgC{O_3}\] is: A. \[BaC{O_3} > CaC{O_3} > M...

Thermal stability of BaCO3BaC{O_3} , CaCO3CaC{O_3} and MgCO3MgC{O_3} is:
A. BaCO3>CaCO3>MgCO3BaC{O_3} > CaC{O_3} > MgC{O_3}
B. BaCO3>MgCO3>CaCO3BaC{O_3} > MgC{O_3} > CaC{O_3}
C. CaCO3>MgCO3>BaCO3CaC{O_3} > MgC{O_3} > BaC{O_3}
D. MgCO3>CaCO3>BaCO3MgC{O_3} > CaC{O_3} > BaC{O_3}

Explanation

Solution

Thermal stability is the ability of the compound to resist breaking and mixing with the water body. It depends on the bonds of the compound. Stronger is the bond more is the thermal stability.

Complete step by step answer:
Thermal stability is defined as the ability of a fluid to resist breaking down under heat stress. It is the stability of the water body and its resistance to mixing. It depends on the structure of the substance which depends on the bonds between atoms. Stronger is the bond, more is the thermal stability.
The compounds given in the options are of second group elements. The first element in the group is Magnesium followed by calcium and after leaving one element we have Barium. As the atomic number increases down the group, the difference in the stability of metal cation and the oxide anion increases. So, the stability of decomposition product metal oxide decreases as close packing is not possible. Hence, the stability of carbonate increases. Therefore, the thermal stability of carbonates increases down the group. Therefore, the order of stability is BaCO3>CaCO3>MgCO3BaC{O_3} > CaC{O_3} > MgC{O_3} .

**So, the correct option is A.

Additional Information: **
In additional information some properties of the elements mentioned can be discussed. We know the basic atomic number and group number of elements. So we will discuss their uses.
First is magnesium, it is mainly used in construction and medicine. It is used to treat skin related problems and also attention deficit hyperactivity disorder. It is also found in vegetables especially leafy vegetables like whole grain, seeds and nuts. It is also used in flashbulbs.
Calcium is a vital part of our body. Our bones and teeth require calcium. It is also used in steelmaking because it readily reacts with oxygen and sulphur. Also, used in food industry and pharmaceutical industry.
Barium compounds are used to make paint, bricks, tiles, glass and rubber. Its compounds are also used by oil and gas industries to make drilling mud.

Note:
There are various properties that affect the reaction of any compound and element. One property leads to the other. So understanding every property is important.