JEE Main Chemistry question

Chemistry The s-Block Elements JEE Main

Not in JEE Main or NEET syllabus

The following compounds have been arranged in order of their increasing thermal stabilities. Identify the correct order: (I), (II), (III), (IV)

(A)I < II < III < IV
(B)IV < II < III < ICorrect
(C)IV < II < I < III
(D)II < IV < III < I

Answer: (B)

Solution

Thermal stability of a carbonate increases with the electropositive character (and ionic size) of the metal, since a more electropositive, larger cation polarizes the carbonate ion less

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Question ID VK-133591