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On heating which of the following releases CO2 easily

(a) Na2CO3 

(b) MgCO3 

(c) CaCO3 

(d) K2CO3

Answers (1)

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Stability of carbonates increases down the group with increase in the size of metal ion. Also the alkali metal carbonates are more stable than alkaline earth metal carbonates.  Hence, MgCO3 is least stable and it releases CO2 most easily. 

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avinash.dongre

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