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Nature of carbonates of alkaline earth metals -
Insoluble in neutral medium but soluble in acid medium thermal stability
-
Reaction of carbonate of alkaline earth metals on heating -
Decompose to give
and oxide
- wherein
Formation of carbonates of alkaline earth metals -
When
is passed through solution of alkaline metal hydroxides
- wherein
Thermal stability of carbonates increases in a group as we move from top to bottom & decreases in a period as we move from left to right.
Option 1)

Option 2)
Option 3)