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  4. Alkaline earth metal carbonates are decomposed on heating and produce residue. Thermal stability of reactant and residue will be - On moving down the group :-

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Q. Alkaline earth metal carbonates are decomposed on heating and produce residue. Thermal stability of reactant and residue will be - On moving down the group :-

The s-Block Elements

Solution:

$MCO _{3} \xrightarrow{\Delta} MO + CO _{2}$
down the group, stability of carbonate $(\uparrow)$
stability of oxide $(\downarrow)$