The correct sequence of thermal stability of the following...

The correct sequence of thermal stability of the following carbonates is:

Options

A $BaC{O}_{3} < CaC{O}_{3} < SrC{O}_{3} < MgC{O}_{3}$
B $MgC{O}_{3} < CaC{O}_{3} < SrC{O}_{3} < BaC{O}_{3}$
C $BaC{O}_{3} < SrC{O}_{3} < CaC{O}_{3} < MgC{O}_{3}$
D $MgC{O}_{3} < SrC{O}_{3} < CaC{O}_{3} < BaC{O}_{3}$

Correct answer

B. $MgC{O}_{3} < CaC{O}_{3} < SrC{O}_{3} < BaC{O}_{3}$

Step-by-step solution

Carbonates of alkaline earth metals are insoluble in water, and all the carbonates decompose on heating. Beryllium carbonate is unstable and can be kept only in the atmosphere of

C{O}_{2} .

The thermal stability increases with increasing cationic size.

BeC{O}_{3} < MgC{O}_{3} < CaC{O}_{3} < SrC{O}_{3} < BaC{O}_{3}

So the correct option is B.

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