1.

Increasing order of thermal stability is :

Answer»

`BeCO_(3)ltMgCO_(3)ltCaCO_(3)ltK_(2)CO_(3)`
`K_(2)CO_(3)ltMgCO_(3)ltCaCO_(3)ltBeCO_(3)`
`BeCO_(3)ltMgCO_(3)ltK_(2)CO_(3)ltCaCO_(3)`
`MgCO_(3)ltBeCO_(3)ltCaCO_(3)ltKCO_(3)`

ANSWER :A


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