Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?

(i) MgCO₃

(ii) CaCO₃

(iii) SrCO₃

(iv) BaCO₃

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Payal Gupta | Contributor-Level 10

8 months ago

This is a multiple choice type question as classified in NCERT Exemplar

Correct option (iv)

BaCO₃ will be the most thermal stable. The size of Ba²⁺ is very large due to which it has low Polarising power and cannot polarise the oxygen atom. As the positive ions gets larger on moving down the group, the

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Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally? (i) MgCO3 (ii) CaCO3 (iii) SrCO3 (iv) BaCO3

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