Q.

Correct order of thermal stability of K2CO3,CaCO3,MgCO3 & BeCO3 is

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a

BeCO3

b

K2CO3

c

MgCO3 < BeCO3

d

BeCO3

answer is A.

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Detailed Solution

As the basicity of metal hydroxides increases doum the group, thermal stability of their Carbonates increases in the same order. Group 1 compounds are more stable than group 2 compounds.
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Correct order of thermal stability of K2CO3,CaCO3,MgCO3 & BeCO3 is