Question

Which one thermally least stable beco3 mgco4 and caco3?

Answer 1

Answer:

Since CaCO3 has more similar ionic radii thanMgCO3, CaCO3 is more stable and takes moreenergy to decompose. caco3 is more stable thanmgco3 beacuse thermal stability of carbonates of group 2 will increase down the group with the increase in the size of cation

Answer 2

Explanation:

B.

BeCO3 < MgCO3 < CaCO3 <K2CO3

Thermal stability of carbonates increases in a group as we move from top to bottom and decreases in a period as we move from left to right. so, the correct order of thermal stability of given carbonates is:

BeCO3 < MgCO3 < CaCO3 < K2CO3

Be, Mg and Ca present in second group and K present in the first group.

Thermal stability of carbonates increases in a group as we move from top to bottom and decreases in a period as we move from left to right. so, the correct order of thermal stability of given carbonates is:

BeCO3 < MgCO3 < CaCO3 < K2CO3

Be, Mg and Ca present in second group and K present in the first group.